Workshop Repair and Service Manuals GMC SIERRA
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Chassis

ABS Description and Operation Dynamics Control ABS Control - part 3      The isolation valve is opened and the dump valve is closed. The increasedpressure is delivered from the master cylinder. Electronic Brake Distribution (EBD) The electronic brake distribution (EBD) is a control system that...
ABS Description and Operation Dynamics Control ABS Control - part 2      As the wheel spins, the wheel speed sensor produces a square wave DCsignal voltage. The wheel speed sensor increases the signal frequency as the wheelspeed increases, but does not increase the signal amplitude.Yaw/lateral...
ABS Description and Operation Dynamics Control ABS Control      This vehicle is equipped with a Bosch ABS/EBD/TCS/VSES brake system. The electronicbrake control module (EBCM) and the brake pressure modulator valve is serviced separately.The brake pressure modulator valve uses a 4-circuit...
Airbag Steering Wheel Module Coil Centering Steering Wheel and Column      Caution:The new SIR coil assembly will be centered. Improperalignment of the SIR coil assembly may damage the unit, causing aninflatable restraint malfunction. Verify the following conditions before centering the...
Airbag Steering Wheel Module Replacement Steering Wheel and Column      Airbag Steering Wheel Module Replacement Callout Component Name Warning:Refer toSIR Inflator Module Handling and Storage Warning. Warning:Refer toSIR Warning. Preliminary Procedure Disable the supplemental...
All Seasons Tires Description Wheels      Most GM vehicles are equipped with steel belted all-seasonradial tires as standard equipment. These tires qualify as snowtires, with a higher than average rating for snow traction than thenon-all season radial tires...
Antilock Brake System Automated Bleed Dynamics Control ABS Control - part 5      Refer toHydraulic Brake System Bleeding.If the brake pedal feel is now firm, repeat the automated bleeding procedure.If the brake pedal stills feels spongy after repeating the base hydraulic brake systembleeding procedure,...
Antilock Brake System Automated Bleed Dynamics Control ABS Control - part 4      Do not leave the bleeder valve open for longer than-60-seconds. If the RR bleeder valve was not fully bled within the-60-second cycle time, pressStart to repeat Step-47-until the brake fluid is clear of any air.Press Enter to...
Antilock Brake System Automated Bleed Dynamics Control ABS Control - part 3      When instructed by the scan tool, stop performing the brake applications and pressEnter. The scan tool will instruct to perform Steps-23–25-2-more times. When instructed by the scan tool, press Start to continue. Note:The...
Antilock Brake System Automated Bleed Dynamics Control ABS Control - part 2      Using the scan tool, perform the following steps:Select DiagnosticsSelect the appropriate vehicle informationSelect ChassisSelect Electronic Brake Control Module (EBCM)Select Special FunctionsSelect Automated BleedPress Start...
Antilock Brake System Automated Bleed Dynamics Control ABS Control      Special ToolsJ-29532 Diaphragm Pressure BleederJ-29532-A Brake Pressure Bleeder, or equivalentJ 35589-A Brake Bleeder Adapter, or equivalent Warning:At times during this brake bleed procedure brake fluid willbe under higher...
Brake and Accelerator Pedal Adjuster Position Sensor Replacement (With Memory Seats)      Removal ProcedureTurn the ignition switch to the OFF position.Remove the driver knee bolster. Refer toKnee Bolster Replacement. Disconnect the adjustable pedal position sensor jumperharness electrical connector-(1)....
Brake Assist System Description and Operation (Hydraulic Assist)      (1) Master Cylinder (2) Power Brake Booster OutletHose (3) Power Brake Booster InletPipe/Hose (4) Hydraulic Brake Booster (5) Power Steering Gear InletPipe/Hose (6) Steering Gear (7) Power...
Brake Caliper Inspection Disc Brakes Brake Calipers      Warning:Refer toBrake Dust Warning. Inspect the brake caliper housing-(1) for cracks,excess wear, and/or damage. If any of these conditions are present,the brake caliper requires replacement.Inspect the caliper piston dust...
Brake Combination Valve Replacement Hydraulic Brakes Master Cylinder      Removal Procedure Raise and support the vehicle. Refer toLifting and Jacking the Vehicle.Disconnect the electrical connector from the combinationvalve.Disconnect the front and rear brake pipes from thecombination...
Brake Drum Diameter Measurement Drum Brakes      Clean the brake shoe lining contact surface of the brake drumwith denatured alcohol or an equivalent brake cleaner.Using a brake drum micrometer calibrated in thousands of aninch, measure and record the largest diameter of...
Brake Drum Replacement Drum Brakes      Special Tools J-42450-AWheel Hub Resurfacing Kit Removal Procedure Warning:Refer toBrake Dust Warning. Raise and support the vehicle. Refer toLifting and Jacking the Vehicle.Remove the tire and wheel assembly. Refer toTire...
Brake Drum Surface and Wear Inspection Drum Brakes      Special Tools J 8001 Dial Indicator Set , or equivalent Warning:Refer toBrake Dust Warning. With the brake drum removed, clean the braking (friction) surface of the brake drumwith denatured alcohol or an equivalent approved...
Brake Fluid Level Indicator Switch Replacement (Non-Hybrid)      Brake Fluid Level Indicator Switch Replacement Callout Component Name Preliminary Procedure Disconnect the master cylinder fluid level sensor electricalconnector. 1 Master Cylinder Fluid Level Sensor...
Brake Fluid Level Indicator Switch Replacement (Two-mode Hybrid)      Brake Fluid Level Indicator Switch Replacement Callout Component Name Preliminary ProceduresPlace the ignition switch in the OFF position.Disconnect the brake fluid level sensor electricalconnector. 1 Brake...
Brake Master Cylinder Adapter Replacement Hydraulic Brakes Master Cylinder      Removal ProcedurePlace the transmission in the PARK or NEUTRALposition.Apply the park brake. Note:The ignition must be in the OFF position, without pausing atACCESSORY, and without applying the brake pedal to ensure the...
Brake Master Cylinder Pressure Sensor Replacement Hydraulic Brakes Master Cylinder      Brake Master Cylinder Pressure Sensor Replacement Callout Component Name Warning:Refer toBrake Fluid Irritant Warning. Caution:Refer toBrake Fluid Effects on Paint and Electrical Components Caution. Preliminary...
Brake Master Cylinder Primary Piston Position Sensor Replacement Hydraulic Brakes Master Cylinder      Removal Procedure Note:The ignition must be in the OFF position, without pausing atACCESSORY, and without applying the brake pedal to ensure the brakemodulator and high pressure accumulator (HPA) pressure reliefoccurs. This...
Brake Pad Inspection Disc Brakes Brake Pads      Warning:Refer toBrake Dust Warning. Inspect the disc brake pads at regular intervals, or wheneverthe tire and wheel assemblies are removed from the vehicle.If replacement is necessary, always replace disc brake padsin axle...