Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2004 Pontiac GTO AutomaticFACTORY OEM SERVICE PROCEDURE
Antilock Brake System And Traction Control System
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Antilock Brake System
- Diagnostic System Check - ABS
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) List
- DTC 21 or 25
- DTC 23 or 27
- DTC 28
- DTC 31 or 35
- DTC 33 or 37
- DTC 41-56
- DTC 58
- DTC 61
- DTC 62
- DTC 63
- DTC 64
- DTC 65
- DTC 66
- DTC 67
- DTC 68
- DTC 71
- DTC 72
- DTC 73
- DTC 78
- DTC 85
- Symptoms - Antilock Brake System
- ABS Indicator Always On
- ABS Indicator Inoperative
- Low Traction Indicator Always On
- Low Traction Indicator Inoperative
- Traction Control Indicator Always On
- Traction Control Indicator Inoperative
- Repair Instructions
- ABS Automated Bleed Procedure
- Electronic Brake Control Module Replacement
- Accelerator and Servo Control Module (ASM) Replacement
- Brake Pressure Modulator Valve (BPMV) Replacement
- Throttle Relaxer Assembly Replacement
- Throttle Relaxer Assembly Adjustment
- Wheel Speed Sensor Replacement - Front
- Wheel Speed Sensor Replacement - Rear
- Wheel Speed Sensor Jumper Harness Replacement - Front (Left)
- Wheel Speed Sensor Jumper Harness Replacement - Front (Right)
- Traction Control Switch Replacement (Manual Transmission)
- Traction Control Switch Replacement (Automatic Transmission)
- Description and Operation
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.