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.
1998 GMC Jimmy 2D Utility, RWD, AutomaticFACTORY OEM SERVICE PROCEDURE
Body Control Module
- Description
- Component Locations
- TBC Module Programming/RPO Configuration
- TBC/BCM Relearn Procedure
- Self-Diagnostic System
- Diagnosis & Testing
- Notes
- TBC Module Diagnostic System Check
- Scan Tool Does Not Communicate With Class 2 Serial Data Line
- DTC B1397: 5-Volt Reference Circuit Low
- DTC B1398: 5-Volt Reference Circuit High
- DTC B1477: Retained Accessory Power (Rap) Circuit Low
- DTC B1478: Retained Accessory Power (Rap) Circuit High
- DTC B1480: Inadvertent Power Circuit Malfunction
- DTC B2527: Front FOGLIGHT Circuit Low
- DTC B2537: Rear FOGLIGHT Circuit Low (Export Only)
- DTC B2575: Headlight Request/Feedback Mismatch
- DTC B2577: Headlight Control Circuit Low
- DTC B2585: Park Light Control Circuit Malfunction
- DTC B2600: Daytime Running Light (DRL) Circuit Malfunction
- DTC B2613: Dimming Potentiometer Circuit High
- DTC B2617: Courtesy Light Circuit Low
- DTC B2618: Courtesy Light Circuit High
- DTC B2647: Ambient Light Sensor Circuit Low
- DTC B2648: Ambient Light Sensor Circuit High
- DTC B2752: Horn Relay Coil Circuit Low
- DTC B2961: Ignition 1 - Key In/Out Mismatch
- DTC B3102: Keyless Entry (RFA) Data Link Circuit Low
- DTC B3137: Door Lock Circuit Low
- DTC B3138: Door Lock Circuit High
- DTC B3147: Passenger Door Unlock Circuit Low
- DTC B3148: Passenger Door Unlock Circuit High
- DTC U1255: Class 2 Communication Malfunction
- DTC U1301: Class 2 Data Link High
- Removal & Installation
- 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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