2011 Chevrolet Silverado 3500 HD Service & Repair Manual

2007-2013 CHEVROLET SILVERADO 3500HD SERVICE AND REPAIR MANUAL

2011 ACCESSORIES AND EQUIPMENT Adjustable Pedals - Sierra And Silverado SPECIFICATIONS FASTENER TIGHTENING SPECIFICATIONS WIRING SCHEMATICS ADJUSTABLE PEDAL WIRING SCHEMATICS Application Specification Metric English Accelerator Actuator Screws 2.5 N.m 22 lb in Accelerator Pedal Bracket Nuts 9 N.m 80 lb in Adjustable Pedal Bracket Nuts 36 N.m 27 lb ft Adjustable Pedal Bracket to Dash Panel Bolt 36 N.m 27 lb ft Brake and Accelerator Pedal Position Sensor Bolts 2 N.m 18 lb in Brake Pedal Pushrod Retainer Bolt 10 N.m 89 lb in Master Cylinder Nuts - With JL4 32 N.m 24 lb ft Master Cylinder Nuts - Without JL4 25 N.m 18 lb ft Transmission Range Selector Cable Support Bolt 10 N.m 89 lb in 2011 Chevrolet Silverado 3500 HD 2011 ACCESSORIES AND EQUIPMENT Adjustable Pedals - Sierra And Silverado

Fig. 1: Adjustable Pedal Wiring Schematic (Without Memory Seats) Courtesy of GENERAL MOTORS CORP. 2011 Chevrolet Silverado 3500 HD 2011 ACCESSORIES AND EQUIPMENT Adjustable Pedals - Sierra And Silverado

Fig. 2: Adjustable Pedal Wiring Schematic (With Memory Seats) Courtesy of GENERAL MOTORS CORP. DIAGNOSTIC INFORMATION AND PROCEDURES DIAGNOSTIC CODE INDEX DIAGNOSTIC CODE INDEX DTC B3604 OR B3605 Diagnostic Instructions  Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. DTC Description DTC B3604 or B3605 B3604 01: Adjustable Foot Pedal Forward Switch Circuit Short to Battery B3605 01: Adjustable Foot Pedal Rearward Switch Circuit Short to Battery DTC B3606 B3606 01: Adjustable Foot Pedal Position Sensor Circuit Short to Battery B3606 06: Adjustable Foot Pedal Position Sensor Circuit Short to Ground or Open DTC B3631 B3631 00: Adjustable Foot Pedal Inhibit Circuit 2011 Chevrolet Silverado 3500 HD 2011 ACCESSORIES AND EQUIPMENT Adjustable Pedals - Sierra And Silverado

 Review Strategy Based Diagnosis for an overview of the diagnostic approach.  Diagnostic Procedure Instructions provides an overview of each diagnostic category. DTC Descriptors DTC B3604 01 Adjustable Foot Pedal Forward Switch Circuit Short to Battery DTC B3605 01 Adjustable Foot Pedal Rearward Switch Circuit Short to Battery Diagnostic Fault Information Circuit/System Description The adjustable pedals forward and rearward switches are inputs to the memory seat module (MSM). The MSM supplies the switch assembly with a battery positive reference voltage. When the switch is operated to the forward or rearward direction, battery positive voltage is applied to the forward or rearward switch signal inputs. Conditions for Running the DTC System voltage is 9-16 volts. Conditions for Setting the DTC The forward and rearward switch signal circuits are active at the same time. Action Taken When the DTC Sets The adjustable pedals will be disabled. Conditions for Clearing the DTC Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance Switch Reference Voltage 1 1 - - Forward Switch Signal 2 2 B3604 01 - Rearward Switch Signal 3 3 B3605 01 - 1. Adjustable Pedals Inoperative 2. Adjustable Pedals Forward Inoperative 3. Adjustable Pedals Rearward Inoperative 2011 Chevrolet Silverado 3500 HD 2011 ACCESSORIES AND EQUIPMENT Adjustable Pedals - Sierra And Silverado

 The DTC becomes history when the conditions for setting the DTC are no longer present.  The history DTC clears after 100 malfunction-free ignition cycles. Reference Information Schematic Reference Adjustable Pedal Schematics Connector End View Reference COMPONENT CONNECTOR END VIEWS - INDEX Description and Operation Adjustable Pedals Description and Operation (with Memory) or Adjustable Pedals Description and Operation (w/o Memory) Electrical Information Reference  Circuit Testing  Connector Repairs  Testing for Intermittent Conditions and Poor Connections  Wiring Repairs Scan Tool Reference Control Module References for scan tool information Circuit/System Verification Ignition ON, observe the scan tool Pedal Forward Switch and Pedal Aft Switch parameters while cycling the adjustable pedal switch between the FWD and RWD position. The appropriate parameter should change between Active and Inactive as commanded. Circuit/System Testing 1. Disconnect the harness connector at the adjustable pedal switch. 2. Ignition ON, test for 11.8-12.2 volts between the appropriate 12-volt reference circuit listed below and ground:  X88/Z88 - terminal 11  Z75 - terminal 5  If greater than the specified range, test the 12-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM. 2011 Chevrolet Silverado 3500 HD 2011 ACCESSORIES AND EQUIPMENT Adjustable Pedals - Sierra And Silverado

 If less than the specified range, test the 12-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM. 3. Verify the scan tool Pedal Forward Switch parameter is Inactive.  If not the specified value, test the appropriate signal circuit terminal listed below for a short to voltage. If the circuit tests normal, replace the MSM.  X88/Z88 - terminal 12  Z75 - terminal 6 4. Verify the scan tool Pedal Aft Switch parameter is Inactive.  If not the specified value, test the appropriate signal circuit terminal listed below for a short to voltage. If the circuit tests normal, replace the MSM.  X88/Z88 - terminal 10  Z75 - terminal 4 5. Install a 3A fused jumper wire between the appropriate signal circuit terminal listed below and B+. The scan tool Pedal Forward Switch parameter should be Active.  X88/Z88 - terminal 12  Z75 - terminal 6  If not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM. 6. Install a 3A fused jumper wire between the appropriate signal circuit terminal listed below and B+. The scan tool Pedal Aft Switch parameter should be Active.  X88/Z88 - terminal 10  Z75 - terminal 4  If not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM. 7. If all circuits test normal, test or replace the adjustable pedal switch. Component Testing X88/Z88 1. Ignition OFF, disconnect the harness connector at the adjustable pedal switch. 2. Test for infinite resistance between the 12-volt reference terminal 11 and the signal terminals listed below:  Terminal 10  Terminal 12  If not the specified value, replace the adjustable pedal switch. 3. Adjustable pedal switch in the FWD position, test for less than 2 ohms between the 12-volt reference terminal 11 and the signal terminal 12.  If greater than the specified range, replace the adjustable pedal switch. 4. Adjustable pedal switch in the RWD position, test for less than 2 ohms between the 12-volt reference terminal 11 and the signal terminal 10. 2011 Chevrolet Silverado 3500 HD 2011 ACCESSORIES AND EQUIPMENT Adjustable Pedals - Sierra And Silverado

 If greater than the specified range, replace the adjustable pedal switch. Z75 1. Ignition OFF, disconnect the harness connector at the adjustable pedal switch. 2. Test for infinite resistance between the 12-volt reference terminal 5 and the signal terminals listed below:  Terminal 4  Terminal 6  If not the specified value, replace the adjustable pedal switch. 3. Adjustable pedal switch in the FWD position, test for less than 2 ohms between the 12-volt reference terminal 5 and the signal terminal 6.  If greater than the specified range, replace the adjustable pedal switch. 4. Adjustable pedal switch in the RWD position, test for less than 2 ohms between the 12-volt reference terminal 5 and the signal terminal 4.  If greater than the specified range, replace the adjustable pedal switch. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure.  Accessory Switch Replacement (without RPO SLT) or Accessory Switch Replacement (with RPO SLT)  Control Module References for the MSM replacement, setup, and programming DTC B3606 Diagnostic Instructions  Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.  Review Strategy Based Diagnosis for an overview of the diagnostic approach.  Diagnostic Procedure Instructions provides an overview of each diagnostic category. DTC Descriptors DTC B3606 01 Adjustable Foot Pedal Position Sensor Circuit Short to Battery DTC B3606 06 Adjustable Foot Pedal Position Sensor Circuit Short to Ground or Open Diagnostic Fault Information 2011 Chevrolet Silverado 3500 HD 2011 ACCESSORIES AND EQUIPMENT Adjustable Pedals - Sierra And Silverado

Circuit/System Description The memory seat module (MSM) monitors the location of the adjustable pedals using the adjustable pedals position sensor. The adjustable pedals position sensor is supplied with 5-volt reference and ground circuits from the MSM. The position sensor signal circuit is referenced from ground within the MSM. The signal voltage monitored by the MSM ranges from 0.45-4.55 volts. Conditions for Running the DTC System voltage to the MSM must be 9-16 volts. Conditions for Setting the DTC The position sensor input to the MSM is not within the 0.45-4.55 volt range. Action Taken When the DTC Sets Memory recall functions will be suspended. Conditions for Clearing the DTC  The DTC becomes history when the conditions for setting the DTC are no longer present.  The history DTC clears after 100 malfunction-free ignition cycles. Reference Information Schematic Reference Adjustable Pedal Schematics Connector End View Reference COMPONENT CONNECTOR END VIEWS - INDEX Description and Operation Adjustable Pedals Description and Operation (with Memory) or Adjustable Pedals Description and Operation (w/o Memory) Electrical Information Reference Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance 5-Volt Reference B3606 06 B3606 06 B3601 01 - Signal B3606 06 B3606 06 B3601 01 - Low Reference - B3606 06 - - 2011 Chevrolet Silverado 3500 HD 2011 ACCESSORIES AND EQUIPMENT Adjustable Pedals - Sierra And Silverado

 Circuit Testing  Connector Repairs  Testing for Intermittent Conditions and Poor Connections  Wiring Repairs Scan Tool Reference Control Module References for scan tool information Circuit/System Testing 1. Ignition OFF, disconnect the harness connector at the adjustable pedal motor. 2. Ignition OFF, test for less than 10 ohm between the low reference circuit terminal 3 and ground.  If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the MSM. 3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal 1 and ground.  If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM.  If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM. 4. Verify the scan tool Pedal Position parameter is less than 0.45 volt.  If greater than the specified range, test the signal circuit terminal 2 for a short to voltage. If the circuit tests normal, replace the MSM. 5. Install a 3A fused jumper wire between the signal circuit terminal 2 and the 5-volt reference circuit terminal 1. Verify the scan tool Pedal Position parameter is greater than 4.55 volts.  If less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the MSM. 6. If all circuits test normal, test or replace the adjustable pedal motor. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure.  Brake Pedal Assembly Replacement  Control Module References for the MSM replacement, setup, and programming DTC B3631 Diagnostic Instructions  Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.  Review Strategy Based Diagnosis for an overview of the diagnostic approach.  Diagnostic Procedure Instructions provides an overview of each diagnostic category. 2011 Chevrolet Silverado 3500 HD 2011 ACCESSORIES AND EQUIPMENT Adjustable Pedals - Sierra And Silverado

2011 Chevrolet Silverado 3500 HD Service & Repair Manual

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