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.
Manufacturer communications
4Original wording in English
CHEVROLET, GMC
Reported code forms C0237
ALLISON LCT1000 NO SHIFT, SPEEDOMETER ERRATIC/INOPERATIVE, DIAGNOSTIC TROUBLE CODES (DTCS) P0721, C0237 POSSIBLE ANTI-LOCK BRAKE SYSTEM (ABS) LAMP ON. SI BULLETIN 1408789. *TT
CHEVROLET, GMC
Reported code forms C0237
SUBJECT REGARDING ABS LIGHT ON AT HIGH SPEEDS (ABOVE 70 MPH OR 113 KM/H), CODE C0237 SET. *TT
CHEVROLET, GMC
Reported code forms C0237
SOME CUSTOMERS MAY COMMENT THAT THE ABS LIGHT COMES ON AT HIGH SPEEDS (ABOVE 70 MPH OR 113 KM/H). UPON INVESTIGATION, A DIAGNOSTIC TROUBLE CODE C0237, REAR WHEEL SPEED SIGNAL ERRATIC, WILL BE FOUND. *TT
CHEVROLET, GMC, HUMMER
Reported code forms C0237
ANTI-LOCK BRAKING SYSTEM (ABS) LIGHT ON SPEEDOMETER MAY BE ERRATIC. DIAGNOSTIC TROUBLE CODE (DTC) C0055 C0235 C0236 OR C0237 STORED IN THE EBCM. *TT 1998-2008 ALL CHEVROLET, GMC, BUICK, AND OLDSMOBILE MID-SIZED TRUCKS…
Check vehicle applicability
62A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Chevrolet | ASTRO | 2005 |
| Chevrolet | ASTRO | 2004 |
| Chevrolet | ASTRO | 2003 |
| Chevrolet | ASTRO | 2002 |
| Chevrolet | ASTRO | 2001 |
| Chevrolet | ASTRO | 2000 |
| Chevrolet | ASTRO | 1999 |
| Chevrolet | ASTRO | 1998 |
| Chevrolet | AVEO | 2005 |
| Chevrolet | AVEO | 2004 |
| Chevrolet | EXPRESS | 2006 |
| Chevrolet | EXPRESS | 2005 |
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.
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.