Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Narrow by vehicle
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer communications
2Original wording in English
AM GENERAL, BUICK, CADILLAC, CHEVROLET, GMC, OLDSMOBILE, PONTIAC
DIAGNOSTIC TROUBLE CODES B1001, B1271 OR B1780 SET WHEN REPLACING / REPROGRAMMING OTHER MODULES FOR 1999 - 2003 PASSENGER CARS AND TRUCKS WITH CLASS 2 SERIAL DATA COMMUNICATION BETWEEN MODULES. *TT
BUICK, CADILLAC, CHEVROLET, GMC, OLDSMOBILE, PONTIAC
DTCS B1001,B1271 OR B1780 SET WHEN REPLACING /REPROGRAMMING OTHER MODULES. (MODELS FROM 1999-2002 ALL PASSENGER CARS AND TRUCKS) *YH
Check vehicle applicability
7A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| AM General | HUMMER ↗ | Year unknown |
| Buick | BUICK ↗ | Year unknown |
| Cadillac | CADILLAC ↗ | Year unknown |
| Chevrolet | CHEVROLET ↗ | Year unknown |
| GMC | GMC ↗ | Year unknown |
| Oldsmobile | OLDSMOBILE ↗ | Year unknown |
| Pontiac | PONTIAC ↗ | Year unknown |
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
Mirror Driver Down Circuit Short To Battery
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.