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.
2001 GMC Jimmy 2D Utility, 4WD, StandardFACTORY OEM SERVICE PROCEDURE
Body Control Module DTCS
BODY CONTROL MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| B1000 | Body Control Module Malfunction |
| B1397 | Device Voltage Reference Out No. 1 Circuit Low |
| B1398 | Device Voltage Reference Out No. 1 Circuit High |
| B1477 | RAP Circuit Low |
| B1478 | RAP Circuit High |
| B1480 | Battery Rundown Protection Circuit Malfunction |
| U1000 & U1255 | CLASS 2 COMMUNICATION MALFUNCTION |
| U1001-U1254 | LOSS OF UXXX COMMUNICATIONS |
| U1300 | Class 2 Serial Data Link Low |
| U1301 | Class 2 Serial Data Link High |
Factory Service Tools
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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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