1999-2004 Oldsmobile Alero Service & Repair Manual
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1999 GENERAL MOTORS
Alero & Grand Am
BUZZERS, RELAYS & TIMERS
BUZZERS, RELAYS & TIMERS
CIRCUIT PROTECTION DEVICES
CIRCUIT PROTECTION DEVICES
CONTROL UNITS
CONTROL UNITS
Component Component Location
A/C Compressor Clutch Relay In underhood junction block.
Automatic Lamp Control (ALC) Relay In underhood junction block.
Blower Motor Relay In underhood junction block.
Daytime Running Lamps (DRL) Relay In underhood junction block.
Door Lock Relay In left I/P junction block.
Door Unlock Relay In left I/P junction block.
Driver's Door Unlock Relay In left I/P junction block.
Electronic Brake Control (ABS) Relay In underhood junction block.
Fan Control Relay No. 1 In underhood junction block.
Fan Control Relay No. 2 In underhood junction block.
Foglight Relay In right I/P junction block.
Fuel Pump Relay In underhood junction block.
Mode Control Relay In underhood junction block.
Park Lamp Relay In underhood junction block.
Rear Compartment Lid Release Relay In I/P junction block.
Rear Defogger Relay In underhood junction block.
Component Component Location
A/C Compressor Clutch Diode In underhood junction block.
Left I/P Junction Block Behind left side of dash.
Right I/P Junction Block Behind right side of dash. See Fig. 7 .
Underhood Junction Block In left side of engine compartment, on strut tower.
Component Component Location
Antenna/Rear Defogger Module Right rear side of passenger compartment.
Body Control Module (BCM) Behind right side of dash. See Fig. 7 .
Body Function Controller (BFC) Below right side of dash.
1999 Pontiac Grand Am GT
1999 GENERAL MOTORS Alero & Grand Am
1999 Pontiac Grand Am GT
1999 GENERAL MOTORS Alero & Grand Am
MOTORS
MOTORS
SENDING UNITS & SENSORS
SENDING UNITS & SENSORS
Cruise Control Module In right side of engine compartment.
Electronic Brake Control Module (EBCM) Inside left front fender. See Fig. 10 .
Fuel Tank Module Under rear of vehicle.
Ignition Control (IC) Module (2.4L) Top right rear of engine. See Fig. 1 .
Ignition Control (IC) Module (3.4L) Top right rear of engine. See Fig. 3 .
Inflatable Restraint Sensing & Diagnostic Module
(SDM)
Under right front seat, below carpet.
Lamp Dimmer Module Behind left side of dash.
Powertrain Control Module (PCM) Below left side of dash, near steering column. See
Fig. 9 .
Sun Roof Control Module Under left side sun visor.
Component Component Location
ABS Motor Pack Assembly Lower left front of engine compartment. See Fig.
10 .
Air Temperature Actuator In center console, right side of HVAC assembly.
Blower Motor Below right side of dash. See Fig. 7 .
Cooling Fan Motor (Left) Behind left side of radiator.
Cooling Fan Motor (Right) Behind right side of radiator.
Idle Air Control (IAC) Valve (2.4L) Left side of engine. See Fig. 2 .
Idle Air Control (IAC) Valve (3.4L) Top rear of engine. See Fig. 4 .
Rear Compartment Lid Release Motor In rear compartment lid.
Washer Motor Between reservoir & frame rail.
Wiper Motor Assembly On left side of firewall.
Component Component Location
A/C Refrigerant Pressure Sensor Front of engine compartment.
Ambient Light Sensor On top of dash trim pad.
Camshaft Position (CMP) Sensor (2.4L) Top left side of engine. See Fig. 2 .
Camshaft Position (CMP) Sensor (3.4L) Front of engine. See Fig. 3 .
Crankshaft Position (CKP) Sensor (2.4L) Lower left side of engine, near oil filter.
Crankshaft Position (CKP) Sensor (7X) (3.4L) Lower right side of engine. See Fig. 3 .
Crankshaft Position (CKP) Sensor (24X) (3.4L) Left front of engine. See Fig. 3 .
Engine Coolant Temperature (ECT) Sensor (2.4L) On right rear of engine. See Fig. 1 .
Engine Coolant Temperature (ECT) Sensor (3.4L) On top left rear of engine. See Fig. 4 .
1999 Pontiac Grand Am GT
1999 GENERAL MOTORS Alero & Grand Am
SOLENOIDS & SOLENOID VALVES
SOLENOIDS & SOLENOID VALVES
Engine Oil Pressure Sensor (2.4L) Top right rear of engine. See Fig. 1 .
Engine Oil Pressure Sensor (3.4L) Lower left side of engine. See Fig. 4 .
Fuel Tank Pressure Sensor Under rear of vehicle.
Input Speed Sensor In transaxle, near valve body. See Fig. 6 .
Intake Air Temperature (IAT) Sensor (2.4L) Top rear of engine. See Fig. 1 .
Intake Air Temperature (IAT) Sensor (3.4L) At left side of engine compartment.
Knock Sensor (2.4L) Right rear side of engine. See Fig. 1 .
Knock Sensor (3.4L) Lower left side of engine. See Fig. 4 .
Manifold Absolute Pressure (MAP) Sensor (2.4L) Left side of engine. See Fig. 2 .
Manifold Absolute Pressure (MAP) Sensor (3.4L) Top right side of engine. See Fig. 4 .
Output Speed Sensor At left rear of transaxle. See Fig. 6 .
Passlock Sensor On left side of dash.
Post Converter Heated Oxygen Sensor (HO2S) No.
2
Near TWC catalyst outlet.
Pre-Converter Oxygen Sensor (O2S) No. 1 (2.4L) In exhaust manifold.
Pre-Converter Oxygen Sensor (O2S) No. 1 (3.4L) In right exhaust manifold. See Fig. 3 .
Throttle Position (TP) Sensor (2.4L) On throttle body. See Fig. 2 .
Throttle Position (TP) Sensor (3.4L) On throttle body. See Fig. 4 .
Vehicle Speed Sensor (VSS) At rear of engine/transaxle.
Washer Solvent Level Sensor Inside left front fender.
Wheel Speed Sensor (Left Front) On left front hub & bearing assembly. See Fig. 10 .
Wheel Speed Sensor (Left Rear) On left rear hub & bearing assembly. See Fig. 10 .
Wheel Speed Sensor (Right Front) On right front hub & bearing assembly.
Wheel Speed Sensor (Right Rear) On right rear hub & bearing assembly.
Component Component Location
ABS Solenoids Lower left front of engine compartment.
Brake Transaxle Shift Interlock (BTSI) Solenoid Under center console.
Evaporative Emission (EVAP) Canister Purge
Valve (2.4L)
Lower left front of engine. See Fig. 2 .
Evaporative Emission (EVAP) Canister Purge
Valve (3.4L)
Top right side of engine. See Fig. 3 .
Evaporative Emission (EVAP) Canister Vent
Solenoid
Under rear of vehicle.
EVO Solenoid Part of power steering pump.
Exhaust Gas Recirculation (EGR) Valve Solenoid
(2.4L)
Top left rear of engine. See Fig. 2 .
Exhaust Gas Recirculation (EGR) Valve Solenoid
(3.4L)
Top right rear of engine. See Fig. 3 .
1999 Pontiac Grand Am GT
1999 GENERAL MOTORS Alero & Grand Am
SWITCHES
SWITCHES
MISCELLANEOUS
MISCELLANEOUS
CONNECTORS
CONNECTORS
Pressure Control Solenoid In transaxle, near valve body. See Fig. 6 .
Shift Solenoid Valves (1-2 & 2-3) In transaxle valve body. See Fig. 6 .
TCC Control PWM Solenoid In transaxle valve body. See Fig. 6 .
Component Component Location
Brake Fluid Level Switch On master cylinder reservoir.
Cruise Control Brake Switch Below left side of dash. See Fig. 8 .
Engine Coolant Level Switch In right side of engine compartment.
Engine Oil Level Switch At rear of engine.
Oil Life/Tire Pressure Monitor Reset Switch In left I/P junction block.
Park Brake Indicator Switch Part of park brake assembly.
Seat Belt Switch Part of driver's seat belt buckle.
Stoplight Switch Below left side of dash. See Fig. 8 .
TFP Manual Valve Position Switch Assembly On transaxle valve body. See Fig. 6 .
Transaxle (TR) Range Switch Left front top of transaxle. See Fig. 5 .
Component Component Location
Antenna/Rear Defogger Choke Left rear side of passenger compartment.
Blower Motor Resistor Below right side of dash. See Fig. 7 .
Data Link Connector (DLC) Below dash, left of steering column. See Fig. 9 .
SIR Coil Assembly On steering column.
Component Component Location
C101 (Black, 10 Pin) On left side of engine compartment.
C102 (Gray, 20 Pin) On front side of transaxle.
C130 (Black, 10 Pin) On top rear of engine. See Fig. 4 .
C200 (Black, 18 Pin) Below left side of dash, near steering column.
C300 (Natural, 10 Pin) Below left side of dash, near steering column.
C301 (Black, 3 Pin) In headliner.
C306 (Black, 2 Pin) Under left front seat.
C400 (Natural/Black, 8 Pin) Left rear of passenger compartment.
C413 (Gray, 16 Pin) Under rear of vehicle.
1999 Pontiac Grand Am GT
1999 GENERAL MOTORS Alero & Grand Am
GROUNDS
GROUNDS
SPLICES
SPLICES
C500 (Gray, 18 Pin) Behind left kick panel.
C501 (Black, 18 Pin) Behind left kick panel.
C600 (Black, 18 Pin) Behind right kick panel.
C700 (W/Power Windows) (Natural, 7 Pin) In right side of passenger's compartment.
C700 (W/O Power Windows) (Blue, 2 Pin) In right side of passenger's compartment.
C800 (W/Power Windows) (Natural, 7 Pin) In left side of passenger's compartment.
C800 (W/O Power Windows) (Blue, 2 Pin) In left side of passenger's compartment.
Component Component Location
G101 On left side of engine compartment, near strut.
G102 (2.4L) On lower front of engine.
G102 (3.4L) On front of engine.
G103 (2.4L) On lower front of the engine.
G103 (3.4L) On left side of engine.
G104 On left side of engine compartment.
G105 On left side of engine compartment.
G201 On left side of dash, near fuse block.
G202 On left side of dash, near fuse block.
G203 On right side of dash, near fuse block. See Fig. 7 .
G204 On right side of dash, near fuse block. See Fig. 7 .
G301 On left side of passenger compartment, at rocker
panel.
G302 On right side of passenger compartment, at rocker
panel.
G401 On left side of passenger compartment, on rear
package shelf.
G402 On right side of passenger compartment, on rear
package shelf.
Component Component Location
S101 In injector harness, 16 cm from C130.
S102 In engine harness, 15 cm from grommet, at firewall.
S103 In engine harness, 15 cm from grommet, at firewall.
S104 In engine harness, 15 cm from grommet, at firewall.
S105 In engine harness, 15 cm from grommet, at firewall.
1999 Pontiac Grand Am GT
1999 GENERAL MOTORS Alero & Grand Am
COMPONENT LOCATION GRAPHICS
Fig. 1: Top Front Of Engine (2.4L)
S301 Under left front seat.
NOTE: Figures may show multiple component locations. Refer to appropriate table for
proper figure references.
1999 Pontiac Grand Am GT
1999 GENERAL MOTORS Alero & Grand Am
Fig. 2: Lower Left Of Engine (2.4L)
1999 Pontiac Grand Am GT
1999 GENERAL MOTORS Alero & Grand Am
Fig. 3: Right Side Of Engine (3.4L)
Fig. 4: Rear Of Engine (3.4L)
1999 Pontiac Grand Am GT
1999 GENERAL MOTORS Alero & Grand Am
Fig. 5: Transaxle Range Switch
1999 Pontiac Grand Am GT
1999 GENERAL MOTORS Alero & Grand Am
Fig. 6: Transaxle Controls
1999 Pontiac Grand Am GT
1999 GENERAL MOTORS Alero & Grand Am
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What's Included?
Lifetime Access
Fast Download Speeds
Offline Viewing
Access Contents & Bookmarks
Full Search Facility
Print one or all pages of your manual
$41.99
The Oldsmobile Alero Complete Workshop Service Repair Manual is a comprehensive guide covering the repair and maintenance of Oldsmobile Alero models from 1999 to 2004. It provides detailed step-by-step instructions for various repair procedures, including engine, transmission, electrical system, suspension, and brakes.
Whether you are a professional mechanic or a DIY enthusiast, this manual will be your go-to resource for troubleshooting and fixing any issues with your vehicle, allowing you to perform both minor and major repairs on your Oldsmobile Alero.
Featuring detailed diagrams, illustrations, and specifications, the manual helps you understand the inner workings of your Oldsmobile Alero and provides valuable information on routine maintenance tasks, such as oil changes, filter replacements, and tire rotations.
Models covered in this manual:
- 1999 Oldsmobile Alero
- 2000 Oldsmobile Alero
- 2001 Oldsmobile Alero
- 2002 Oldsmobile Alero
- 2003 Oldsmobile Alero
- 2004 Oldsmobile Alero
Invest in the Oldsmobile Alero Complete Workshop Service Repair Manual to ensure that your vehicle is always in top condition.
