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
1Original wording in English
BUICK, CADILLAC, CHEVROLET, GMC, HUMMER, PONTIAC, SAAB
Reported code forms P0068
This PI was superseded to update model years and add information concerning idle surge, reduced engine power mode, and/or DTCs P0068, P0121, P1516, P2101, P2119, and/or P2176 that may be experienced on high mileage…
Check vehicle applicability
12A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| GMC | SIERRA 2500 | 2018 |
| GMC | SIERRA 2500 | 2017 |
| GMC | SIERRA 2500 | 2016 |
| GMC | SIERRA 2500 | 2015 |
| GMC | SIERRA 2500 | 2014 |
| GMC | SIERRA 2500 | 2013 |
| GMC | SIERRA 2500 | 2012 |
| GMC | SIERRA 2500 | 2011 |
| GMC | SIERRA 2500 | 2010 |
| GMC | SIERRA 2500 | 2009 |
| GMC | SIERRA 2500 | 2008 |
| GMC | SIERRA 2500 | 2007 |
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.