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.
1996 GMC Pickup K2500, 2D Pickup, 5.7 R, StandardFACTORY OEM SERVICE PROCEDURE
Anti-Lock Brake System - Diesel
- Description
- Operation
- Bleeding Brake System
- Diagnosis
- Diagnostic Charts
- Chart A: Abs Warning Light Off At All Times. No DTC'S Stored
- Diagnostic System Check
- DTC 21: Right Front Wheel Speed Sensor Circuit Open
- DTC 22: Right Front Wheel Speed Sensor Signal Missing
- DTC 23: Erratic Right Front Wheel Speed Sensor Signal
- DTC 25: Left Front Wheel Speed Sensor Circuit Open
- DTC 26: Left Front Wheel Speed Sensor Signal Missing
- DTC 27: Erratic Left Front Wheel Speed Sensor Signal
- DTC 29: Simultaneous Signal Drop-Out Of Front Wheel Speed
- DTC 35: Open Or Grounded Rear Wheel Speed Sensor Circuit
- DTC 36: Missing Rear Wheel Speed Sensor Signal
- DTC 37: Erratic Rear Wheel Speed Sensor Signal
- DTC 38: Wheel Speed Error
- DTC 41, DTC 42, DTC 43, DTC 44, DTC 45, DTC 46, DTC 47, DTC 48, DTC 49, DTC 50, DTC 51, DTC 52, DTC 53, DTC 54: BPMV Control Valves
- DTC 65 Or DTC 66: Open Or Shorted Pump Motor Relay
- DTC 67 Or DTC 68: Pump Motor Circuit
- DTC 71, DTC 72, DTC 73, DTC 74: EBCM Memory Errors
- DTC 81: Brake Switch Circuit Open Or Shorted
- DTC 86: Shorted Abs Indicator Light
- DTC 88: Shorted Brake Warning Light
- Removal & Installation
- Adjustments
- Torque Specifications
- Wiring Diagrams
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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