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
3Original wording in English
VOLKSWAGEN
Be aware that there are 2 suppliers for the TDI glow plugs-Bosch and Beru. When replacing the glow plugs make sure that you do not mix stock. The vehicle must have all the same supplier or DTC P0380 (Glow Plug Monitoring) may set.
CHEVROLET, GMC
6.6 LB7 ENGINE WITH A NO CHARGE CONDITION WITH DIAGNOSTIC TROUBLE CODE P0380 P0621. *SC
CHEVROLET, GMC
A NO CHARGE CONDITION WITH DIAGNOSTIC TROUBLE CODE (DTC) P0380, P0621. *TT
Check vehicle applicability
23A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Chevrolet | SILVERADO ↗ | 2004 |
| Chevrolet | SILVERADO ↗ | 2003 |
| Chevrolet | SILVERADO ↗ | 2002 |
| Chevrolet | SILVERADO ↗ | 2001 |
| GMC | SIERRA ↗ | 2004 |
| GMC | SIERRA ↗ | 2003 |
| GMC | SIERRA ↗ | 2002 |
| GMC | SIERRA ↗ | 2001 |
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
Glow Plug/Heater Circuit “A” Malfunction
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.