2012 GMC P0011: What It Means & Is It Safe to Drive?
P0011 on the 2012 GMC: Camshaft Position A – Timing Over-Advanced or System Performance (Bank 1). Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
What this code means
The intake camshaft on bank 1 is more advanced than the PCM commanded, or the VVT system isn't responding as expected. Often caused by low/dirty oil or a faulty oil control valve.
Common causes on the 2012 GMC
- Low or dirty engine oil (most common—change oil first)
- Failed or sludged oil control valve (OCV/VVT solenoid)
- Stretched or worn timing chain
- Stuck VVT actuator (cam phaser)
Symptoms
- Check Engine Light
- Rough idle or rattling on cold startup
- Poor fuel economy
- Reduced power
Typical fixes
- Oil change with correct viscosity oil (often resolves it)
- Clean or replace oil control valve
- Replace timing chain if stretched
- Replace cam phaser if faulty
Repair cost range
For a 2012 GMC, repairs for P0011 typically fall between $50 and $1200, depending on the root cause and labor rates in your area.
Known issues on GMC
GMC P0011 intake cam over-advanced timing on the 3.6L LFX V6 in Acadia is typically a clogged VVT solenoid from dirty oil. Change the oil first with the correct viscosity. On the 5.3L LS V8, P0011 is less common—a failed cam phaser is the more likely cause after oil service.
Most commonly affected models