P0011 on a GMC: Causes, Fixes & Repair Cost

🟠 Moderate severity · drivable

You can usually drive a GMC to a shop with P0011, but check the oil level first, and if the engine runs rough or the light flashes, have it towed.

What P0011 means on a GMC

On a GMC, P0011 means the variable valve timing system is advancing the intake camshaft on bank 1 further than the computer commanded. The camshaft is ahead of where it should be, usually because a VVT solenoid or cam phaser is sticking.

Is P0011 common on GMCs?

P0011 appears on GMC models with VVT engines, including the Sierra, Yukon, Terrain, and Acadia. VVT solenoids are a known wear item on GM engines and often fail with overdue oil, and low oil pressure can also trigger the code.

Commonly reported on: Sierra, Yukon, Terrain, Acadia.

Symptoms

Check engine light on
Rough idle or hesitation, especially when cold
Reduced fuel economy
Engine feels flat on acceleration

Common causes

most common: Dirty or failing VVT solenoid
common: Low oil level or low oil pressure
common: Overdue oil changes or engine sludge
less common: Worn cam phaser
less common: Timing chain stretch

How to fix it

Fix	DIY?	Typical cost
Change the oil and filter with the correct grade	Yes	$40–100
Clean or replace the VVT solenoid	Yes	$60–250
Replace the cam phaser if it is worn	Mechanic	$500–1500
Have oil pressure checked if the code returns	Mechanic	$100–250

Frequently asked questions

Can I drive my GMC with a P0011 code?

Yes, usually for a short time. Check the oil level first, and if the engine idles rough or the light flashes, have it towed instead.

Why does P0011 happen on GMCs?

VVT solenoids are a common wear item on GM engines and often fail with overdue or sludged oil. Low oil pressure and worn cam phasers can also set this code.

How much does it cost to fix P0011 on a GMC?

An oil change is about $40–$100 and a VVT solenoid runs $60–$250. Cam phaser work costs more, often $500–$1,500.