1995-2007 Hummer H1 Service & Repair Manual

2001 SERVICE MANUAL COMMERCIAL HUMMER ® AM GENERAL CORPORATION 408 South Byrkit Avenue P.O. Box 728 Mishawaka, Indiana 46546-0728 AM General Number 5745279 Copyright © 2000 All Rights Reserved. Printed in U.S.A. TABLE OF CONTENTS General Information 1 Engine 2 Fuel, Emissions and Exhaust 3 Cooling System 4 Transmission/Transfer Case 5 Wheels and Tires/ Central Tire Inﬂation System 6 Brake System 7 Steering System 8 Axles/Suspension and Frame 9 Body 10 Heating/Ventilation/ Air Conditioning (HVAC) 11 Electrical 12 Accessories 13 Index 14

________________________________________________________________________________ 1-1 ® 5745279 Section 1 General Information, Lubrication and Maintenance TABLE OF CONTENTS Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12 About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Bolt Identification and Torque Limits (Dry*) . . . . . . . . . . . . . . . 1-13 Bolt Identification and Torque Limits (Wet*) . . . . . . . . . . . . . . . 1-14 Carbon Monoxide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Component Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 Emission Control information Label . . . . . . . . . . . . . . . . . . . . . . 1-3 Engine Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 EPA Noise Emission Control Information Label . . . . . . . . . . . . . 1-5 Essential Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31 Fluid Capacities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10 Hummer Service Hotline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Lubrication and Maintenance Items. . . . . . . . . . . . . . . . . . . . . . 1-25 Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21 Miscellaneous Essential Tools . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33 Paint and Trim Colors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16 Recommended Fuel/Fluids/Lubricants/Capacities . . . . . . . . . 1-24 Replacement Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16 Safety Certification Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Scheduled Maintenance Chart . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22 Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34 Towing, Lifting, Jump Starting . . . . . . . . . . . . . . . . . . . . . . . . . 1-17 Transfer Case Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 Transmission Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 U.S./Metric Conversions and Equivalents . . . . . . . . . . . . . . . . 1-15 Vehicle Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11 Vehicle Identification Number (VIN) . . . . . . . . . . . . . . . . . . . . . . 1-5 Vehicle Weights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10 SAFETY SUMMARY Individuals who decide to perform their own repairs should have proper training and limit repairs to components which will not affect the safety of the vehicle or its occupants. When replacement parts are required, it is strongly recommended that they are purchased through an authorized HUM- MER dealer. It is essential that replacement parts meet or exceed manufacturer’s specifications. Vehicle performance and personal safety may be impaired if other than original fac- tory components are installed. The installation of nonapproved accessories or conversions is not recommended as they could affect the vehicle’s driving characteristics and personal safety. AM General Corporation will not be liable for personal injury or damage to property re- sulting from the installation of nonapproved accessories or conversions to the HUMMER. Following the safety precautions as prescribed throughout this manual may greatly reduce the risks of personal injury and damage to the vehicle. However, it is unlikely that AM General Corporation will account for all possibilities. Warnings, cautions, and notes are used throughout this service manual to assist service personnel in the performance of maintenance actions. These statements are designed as reminders for trained and experienced service personnel. WARNINGS — Indicate potential safety hazards and must be followed to avoid personal injury. Warnings appear as follows: CAUTIONS — Indicate potential equipment damage, and must be followed to avoid damage to components or systems. An example of a caution is shown below: NOTES — Indicate methods or actions that may simplify vehicle maintenance or help maintain vehicle performance. An example of a note is shown below: WARNING: To avoid injury, do not remove surge tank filler cap before depressurizing cooling system when engine temperature is above 190° F (88° C). CAUTION: To avoid starter damage, do not operate starter continuously for more than 15 seconds. Wait 10 to 15 seconds between periods of operation. NOTE: Clean all components, examine for wear or damage, and replace if necessary.

1-2 General Information, Lubrication and Maintenance _________________ ® CARBON MONOXIDE WARNING: Carbon monoxide (exhaust gases) can be fatal. WARNING: Brain damage or death can result from heavy exposure to carbon monoxide. The following precautions must be followed to ensure personal safety. 1. Do not operate vehicle engine in enclosed areas. Do not idle the vehicle engine with vehicle windows closed. Be alert at all times for exhaust odors. Be alert for exhaust poisoning symptoms. They are: • Headache • Dizziness • Sleepiness • Loss of muscular control 2. If you see another person with exhaust poisoning symptoms: • Remove person from area • Expose to open air • Keep person warm • Do not permit physical exercise • Administer artificial respiration, if necessary • Notify medical personnel The best defense against exhaust poisoning is adequate ventilation. ABOUT THIS MANUAL This service manual contains instructions for maintaining the 1999 commercial HUMMER. Spend some time looking through this manual. Features to improve the usefulness of this manual and increase your efficiency are: Accessing Information - These include: tabulated sections for quick reference, extensive troubleshooting guides for specific systems, and step-by-step directions for service repairs. Illustrations - A variety of methods are used to make locating and repairing components easy. Locator illustrations, exploded views, and cut-away diagrams make the information in this manual easy to understand. The service manual is the best source available for providing information and data critical to vehicle operation and maintenance. In this manual you will find the following information: • Safety Summary • General Information • General Service Procedures • Detailed Service Procedures • Torque Ranges • Wiring Diagrams and Schematics HUMMER owners and dealership service personnel can sub- mit service manual suggestions and comments in writing to: AM General Corporation Commercial Publications Department 408 S. Byrkit St. P.O. Box 728 Mishawaka, IN 46546-0728 Forms are furnished at the end of this manual. Service Manual Revisions In order to receive future revisions to this service manual, please write to: AM General Corporation Service Parts Logistics Operations Commercial Publications/Customer Service 408 South Byrkit Avenue P.O. Box 728 Mishawaka, Indiana 46546-0728 Be sure to specify publication number. HUMMER SERVICE HOTLINE On occasion, an unusual service problem can arise that is not covered in the manual. For this reason, AM General Corpora- tion has established a service hotline for dealership assistance. The hotline number is: 1-800-638-8303 Transfer Case Hotline If you have questions that are not answered in Section 5 of this Service Manual, you can call the Transfer Case Hotline at 1-800-945-4327 (in the U.S.) for more information. Interna- tional and Canadian customers and dealers should call 1-315-432-4110.

________________ General Information, Lubrication and Maintenance 1-3 ® 5745279 EMISSION CONTROL INFORMATION LABEL The vehicle emission control label contains engine information such as curb idle rpm, engine displacement, catalytic converter type, fuel rate, and vacuum hose routing. This label is affixed to the air cleaner housing (Figure 1-1). Figure 1-1: Emission Control Information Label Information

1-4 General Information, Lubrication and Maintenance _________________ ® SAFETY CERTIFICATION LABEL The safety certification label is located on the driver side B- pillar (door latch post) (Figures 1-2, 1-3, and 1-4). The label is required by the National Highway Traffic Safety Administra- tion and includes a tamper-proof feature. If the label is tampered with, a void pattern will appear across the label. The label contains the name of the manufacturer, the month and year the vehicle was manufactured, the certification statement, the vehicle identification number (VIN), and the vehicle model type. It also contains the Gross Vehicle Weight Rating (GVWR), Gross Axle Weight Ratings (GAWR), and wheel and tire information. For more information on the GVWR and GAWR, refer to “VEHICLE LOADING INFORMATION” in the Hummer Owner’s Manual. Figure 1-2: Safety Certification Label for Fleet Vehicles (12,100 lb. GVW vehicles) Figure 1-3: Safety Certification Label for 10,300 lb GVWR Vehicles Figure 1-4: Safety Certification Label for 10,800 lb GVWR Vehicles TRANSMISSION IDENTIFICATION The 4L80-E automatic transmission serial number is located on a plate at the right side of the transmission (Figure 1-5). Figure 1-5: Transmission I.D. Plate Location MFD BY: AM GENERAL CORPORATION DATE: GVWR: GAWR FRONT: GAWR REAR: 4,672 kgs. (10,300 lbs.) WITH 37 X 12.50R-16.5LT LOAD RANGE "D" TIRES 1,860 kgs. (4,100 lbs.) WITH 37 X 12.50R-16.5LT (D) TIRES, 16.5 X 8.25 RIMS AT 240 kPa (35 PS I) COLD 3,084 kgs. (6,800 lbs.) WITH 37 X 12.50R-16.5LT (D) TIRES, 16.5 X 8.25 RIMS AT 276 kPa (40 PS I) COLD V.I.N.: TYPE: TRUCK THIS VEHICLE CONFORMS TO ALL APPLICABLE FEDERAL MOTOR VEHICLE SAFETY STANDARDS IN EFFECT ON THE DATE OF MANUFACTURE SHOWN ABOVE 37 X 12.50R-17LT LOAD RANGE "E" TIRES, WITH 17 X 8.50 RIMS AT 240 kPa (35 PS I) COLD FRONT AND 276 kPa (40PS I) COLD REAR. OPTIONAL TIRE AND RIM INFORMATION VEHICLE SPEED IS RESTRICTED TO 60KM/H (40 MPH) WHEN USING 9.50R-16.5LT LOAD RANGE "E" SPACE SAVER TIRE, AND 16.5 X 8.25 RIM AT 517 kPa (75 PS I) COLD. SPACE SAVER SPARE TIRE INFORMATION 6011176 00-OM1-006 MFD BY: AM GENERAL CORPORATION DATE: GVWR: GAWR FRONT: GAWR REAR: 4,900 kgs. (10,800 lbs.) WITH 37 X 12.50R-16.5LT LOAD RANGE "D" TIRES 1,860 kgs. (4,100 lbs.) WITH 37 X 12.50R-16.5LT (D) TIRES, 16.5 X 8.25 RIMS AT 240 kPa (35 PS I) COLD 3,084 kgs. (6,800 lbs.) WITH 37 X 12.50R-16.5LT (D) TIRES, 16.5 X 8.25 RIMS AT 276 kPa (40 PS I) COLD V.I.N.: TYPE: TRUCK THIS VEHICLE CONFORMS TO ALL APPLICABLE FEDERAL MOTOR VEHICLE SAFETY STANDARDS IN EFFECT ON THE DATE OF MANUFACTURE SHOWN ABOVE 37 X 12.50R-17LT LOAD RANGE "E" TIRES, WITH 17 X 8.50 RIMS AT 240 kPa (35 PS I) COLD FRONT AND 276 kPa (40PS I) COLD REAR. OPTIONAL TIRE AND RIM INFORMATION VEHICLE SPEED IS RESTRICTED TO 60KM/H (40 MPH) WHEN USING 9.50R-16.5LT LOAD RANGE "E" SPACE SAVER TIRE, AND 16.5 X 8.25 RIM AT 517 kPa (75 PSI) COLD. SPACE SAVER SPARE TIRE INFORMATION 6011177 00-OM1-005 TRANSMISSION I.D. PLATE

________________ General Information, Lubrication and Maintenance 1-5 ® 5745279 EPA NOISE EMISSION CONTROL INFORMA- TION LABEL The EPA noise emission control information label is located on the passenger side B-pillar (door latch post). The label is required by the EPA and includes a tamper-proof feature. If the label is tampered with, a void pattern will appear across the label. Notify the dealer or the manufacturer if the label is missing or displays a void pattern (Figure 1-6). The label contains the name of the manufacturer, the month and year the vehicle was manufactured, a statement regarding vehicle conformance to applicable U.S. EPA regulations, and a description of acts prohibited by the Noise Control Act of 1972. Figure 1-6: EPA Noise Emission Control Information Label Location TRANSFER CASE IDENTIFICATION The transfer case serial and assembly numbers are located on a tag attached to the rear case (Figure 1-7). Figure 1-7: Transfer Case I.D. Plate Location ENGINE IDENTIFICATION The engine serial number label is located at the rear of the left cylinder head (Figure 1-8). Figure 1-8: Engine I.D. Label Location VEHICLE IDENTIFICATION NUMBER (VIN) The VIN plate is located at the upper left front corner of the dashpad (Figure 1-9). Figure 1-9: VIN Plate Location The first twelve digits of the seventeen digit VIN are explained in the chart on the following page. TRANSFER CASE SERIAL NUMBER (ON ID PLATE) ENGINE SERIAL NUMBER LABEL VIN PLATE

1-6 General Information, Lubrication and Maintenance _________________ ® 1 3 7 Z A 89 3 4 1 E 000001 Digit 1 Manufacturing Country Digit 2 Company/Make Digit 3 Vehicle Type Digit 4 Engine Type Digit 5 Transmission/Drive Digit 6 and 7 Truck Line Series Model, Body Type Digit 12 Sequential, Assigned Serial Number Digit 11 Plant Code Digit 10 Model Year Digit 9 Check Digit Digit 8 GVWR through 17 Vehicle Identiﬁcation Number Decoding Chart Digit Code Code Definition 1 1 United States 2 3 AM General Corporation 3 7 Commercial Vehicles 4 Z 6.5L (395 in. 3 ),Turbocharged Diesel, GM, 8 cyl., 195 hp F 6.5L (395 in. 3 ),Turbocharged Diesel, GEP, 8 cyl.,195 hp 5 A 4-Speed, Automatic/LHD 6 & 7 83 1-1/4 ton 4-door Truck, utility 84 1-1/4 ton Station wagon Truck, utility 89 1-1/4 ton 2-door enlarged cab Truck, utility 90 1-1/4 ton Open body w/full hard doors Truck, utility 91 1-1/4 ton Slant Back Truck, utility 8 3 Class 3, 10,001 lb - 14,000 lb (4,541 kg - 6,356 kg) 9 — Check Digit 10 1 2001 11 E Mishawaka, Indiana 12-17 — Sequential Serial Number

________________ General Information, Lubrication and Maintenance 1-7 ® 5745279 COMPONENT DATA Engine: Manufacturer .................................................................................................................................................... GM Powertrain or GEP Model ........................................................................................................................................................................... 6.5 L (395 in. 3 ) Type .........................................................................................................................Four Cycle, Turbocharged Diesel, Liquid-Cooled Power Output: ..................................................................................................... 195 HP @ 3400 rpm/430 ft lb. Torque @ 1800 rpm Engine Dimensions: Length.............................................................................................................................................................................. 35 in. (89 cm) Width ............................................................................................................................................................................... 28 in. (71 cm) Height .............................................................................................................................................................................. 28 in. (71 cm) Net Weight, Dry ............................................................................................................................................................ 701 lb (318 kg) Governed Speed: Full Load ............................................................................................................................................................................ 3,400 RPM No Load .............................................................................................................................................................................. 3,650 RPM Idle Speed ............................................................................................................................................................................... 700 RPM Operating Speed ........................................................................................................................................................ 1,500-2,600 RPM Cylinders: Number ................................................................................................................................................................................................. 8 Arrangement ................................................................................................................................................................................. 90° V Firing Order .............................................................................................................................................. 1-8-7-2-6-5-4-3 (Clockwise) Bore ...................................................................................................................................................................... 4.06 in. (103.12 mm) Stroke ......................................................................................................................................................................... 3.82 in. (9.7 cm) Displacement ................................................................................................................................................................. 6.5 L (395 in. 3 ) Compression Ratio: ......................................................................................................................................................................20.2:1 Lubricating System: Type ................................................................................................................................................................................. Pressure Feed Operating Pressure: (Minimum) ................................................................................................................................. 30 psi (206.8 kPa) @ 2000 RPM (Idle Minimum) ..................................................................................................................................................... 6 psi (41.3 kPa) System Capacity (Filter Included)...................................................................................................................................... 8 qt (7.6 L) Operating Temperature (Normal)................................................................................................................. 180°-275° F (82°-135° C) Oil Pump ............................................................................................................................................................................High Output Filter ................................................................................................................................................................ Paper Element, Spin On Fuel/Air System: Fuel Supply Pump Type ....................................................................................................................................................... Electronic Fuel Filter Type ...................................................................................................................... Two Stage Fuel Filter /Water Separator Glow Plug Type ........................................................................................................................................................... (11G) Fast Start Starter: Manufacturer ...........................................................................................................................................................................Prestolite Model ........................................................................................................................................................................................... MMO Capacity (Peak) ........................................................................................................................................................................... 6.0 hp Voltage ........................................................................................................................................................................................... 12 V Cooling System: Type ........................................................................................................................................................... Liquid w/Fan and Radiator Operating Temperature. ............................................................................................................................... 190°-235° F (88°-113° C) Filler Cap Pressure ...................................................................................................................................................... 15 psi (103 kPa) Radiator Type .................................................................................................................................................. 4 Row Core Downflow Fan Type ..............................................................................................................................................8 Blade,suction w/viscous drive Fan Diameter ............................................................................................................................................................ 19.5 in. (49.5 cm)

1-8 General Information, Lubrication and Maintenance _________________ ® Thermostat: Starts to Open .......................................................................................................................................................... 190° F (88° C) Fully Open ............................................................................................................................................................. 212° F (100° C) Generator: Manufacturer ................................................................................................................................................................................ Delco Output ................................................................................................................................................. 124 AMP @ 1842 Engine RPM Rated Voltage .................................................................................................................................................................. 13.35 -15.9 V Batteries: Manufacturer ..............................................................................................................................................................Johnson Controls Type .......................................................................................................................................................................... Low Maintenance Number ............................................................................................................................................................................................... 2 Voltage ...........................................................................................................................................................................................12 V Amperage @ 0° F ...............................................................................................................................800 Cold Cranking amps Each Battery 32° F ...............................................................................................................................1000 Cold Cranking amps Each Battery 80° F ............................................................................................................................................110 Reserve Capacity (Minutes) Transmission: Manufacturer ................................................................................................................................................................ GM Powertrain Model ......................................................................................................................................................................................... 4L80-E Type ...................................................................................................................................................................... 4-Speed, Automatic Converter Torque Ratio ................................................................................................................................................................ 2.2:1 Gear Ratios: First...................................................................................................................................................................................... 2.48:1 Second ................................................................................................................................................................................. 1.48:1 Third .................................................................................................................................................................................... 1.00:1 Fourth .................................................................................................................................................................................. 0.75:1 Reverse ....................................................................................................................................................................................... 2.08:1 Oil Type .............................................................................................................................................................................. Dexron ® III Oil Pressure .............................................................................................................................................. 35-324 psi (241-2,234 kPa) Transfer Case: Manufacturer ........................................................................................................................................................... New Venture Gear Model ................................................................................................................................................................................................ 242 Type ......................................................................................................................................................... Full Time Four-Wheel Drive Gear Ratios High and High Lock ..........................................................................................................................................................................1:1 Low Range................................................................................................................................................................................... 2.72:1 Oil Type .............................................................................................................................................................................. Dexron ® III Geared Hub: Manufacturer ......................................................................................................... AM General Corporation design, made by Tremec Type ...................................................................................................................................................................................... Spur Gears Gear Ratio.....................................................................................................................................................................................1.92:1 Oil Type ................................................................................................................................................................................ SAE 80-90 Axle/Differential: Manufacturer ............................................................................................................. AM General Corporation design, made by Dana Type: Axle ...................................................................................................... Fixed Mounted Differential W/ Independent Half Shafts Differential .............................................................................................................Hypoid Torque Biasing (Paired Worm Gears) Gear Ratio: 10,300 and 10,800: ................................................................................................................................................................2.56:1 12,100:...................................................................................................................................................................................3.08:1

________________ General Information, Lubrication and Maintenance 1-9 ® 5745279 Service Brake Caliper (Front): Manufacturer ................................................................................................................................................................... Kelsey-Hayes Piston Diameter ............................................................................................................................................................ 2.6 in. (6.6 cm) Service/Parking Brake Caliper (Rear): Manufacturer ................................................................................................................................................................... Kelsey-Hayes Piston Diameter ............................................................................................................................................................ 2.6 in. (6.6 cm) Service/Parking Brake Rotor: Manufacturer ................................................................................................................................................................... Kelsey-Hayes Diameter ................................................................................................................................................................ 10.5 in. (266.7 mm) Thickness .................................................................................................................................................................... 0.87 in. (22 mm) Minimum Thickness ................................................................................................................................................. 0.81 in. (20.7 mm) Steering System: Steering Gear: Manufacturer ..................................................................................................................................................................... Saginaw Type ......................................................................................................................................... Recirculating Ball, Worm and Nut Ratio ................................................................................................................................................................................... 13/16:1 Power Steering Pump: Manufacturer ..................................................................................................................................................................... Saginaw Output Pressure (Max) .................................................................................................... 1,465 - 1,515 psi (10,101 - 10,446 kPa) Flow Rate (Max) ........................................................................................................................................... 2.6 gpm (9.8 Lpm) Capacity (@ 1500 RPM) .............................................................................................................................. 2.6 gpm (9.8 Lpm) Reservoir ............................................................................................................................................................................ Remote Frame: Manufacturer ............................................................................................................. AM General Corporation design, made by Dana Type ........................................................................................................................................................................................ Steel Box No. of Crossmembers ........................................................................................................................................................................... 5 Air Conditioner: Manufacturer (Compressor) ............................................................................................................................................. GM-Harrison Model ............................................................................................................................................................................................ HD-6 Field (Coil) ..................................................................................................................................................................................... 12 V Oil Capacity.................................................................................................................................................................. 8 fl oz (237 ml) Refrigerant .................................................................................................................................................................................. R-134a Capacity (system + 2 oz. of oil) .................................................................................................................................. 3.2 lb. (1.45 kg) Winch: Manufacturer ................................................................................................................................................................................. Warn Model ................................................................................................................................................... 12,000 lb., 12VDC HUMMER Type .......................................................................................................................................... Electric Drive, Thermal Cutoff Switch Capacity................................................................................................................................................................. 12,000 lb (5,448 kg) Wheels and Tires: Manufacturer ..........................................................................................................................Goodyear Tire Size 37 in. X 12.5R-16.5 Wheel Type: Standard ......................................................................................................................................................................... One-Piece Size ........................................................................................................................................................................... 16.5 x 8.25 in.

1995-2007 Hummer H1 Service & Repair Manual

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