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.
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HOMESERVICE MANUALSGMC1992JIMMY BASE, 2D UTILITY, 4.3 Z, RWD, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESTRACTION CONTROLANTI-LOCK BRAKE SYSTEM - 4-WHEEL
1992 GMC Jimmy Base, 2D Utility, 4.3 Z, RWD, Standard
Anti-Lock Brake System - 4-Wheel
1992 GMC Jimmy Base, 2D Utility, 4.3 Z, RWD, StandardSECTION Anti-Lock Brake System - 4-Wheel
- Description
- Operation
- Bleeding Brake System
- Diagnosis & Testing
- Trouble Shooting Charts
- Notes
- Diagnostic Circuit Check
- Antilock Light On/Off
- Brake Pedal Pulses
- Wheel Pull During Hard Braking
- Code 21, 25, 31 Or 35 - Speed Sensor Failure Or Open Circuit
- Code 22, 26, 32 Or 36 - Missing Speed Signal
- Code 23, 27, 33 Or 37 - Erratic Speed Sensor
- Code 28 - Erratic Speed Sens Sig (2 Drop-Outs Above 20 Mph)
- Code 29 - Simultaneous Dropout Of All Speed Sens Above 8 Mph
- Code 35 - Speed Sens Failure Or Open CKT ("C" & "K" Series)
- Code 37 - Erratic Speed Sensor Signal ("C" & "K" Series)
- Code 38 - Speed Sensor Error
- Codes 41-54 - Control Valves
- Code 61, 62 Or 63 - Reset Switches
- Code 65 Or 66 - Pump Motor Relay Open Or Shorted
- Codes 67 Or 68 - Pump Motor Malfunction Or Ecu Output Shorted
- Codes 71-74 - Memory Errors
- Code 81 - Brake Switch Circuit Open Or Shorted
- Code 86 - Antilock Light Shorted
- Code 88 - Brake Light Shorted
- Removal & Installation
- Adjustments
- Torque Specifications
- Wiring Diagrams
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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.