P0507 on a GMC: Causes, Fixes & Repair Cost

🟠 Moderate severity · drivable

Drivable, but the engine idles too fast, which wastes fuel and can feel odd at stops.

What P0507 means on a GMC

On a GMC, P0507 means the engine idles faster than the computer expects. Carbon in the throttle body or a vacuum leak lets too much air in at idle. The truck still drives, but the high idle wastes fuel and can feel odd at stops.

Is P0507 common on GMCs?

P0507 is common on GMC trucks and SUVs like the Sierra, Yukon, Terrain, and Acadia. GM throttle bodies are prone to carbon buildup, which is a frequent cause of high idle. Vacuum leaks and a sticking idle air control valve on older models are also common.

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

Symptoms

Check engine light is on
High idle speed
Engine surges at idle
Car creeps forward at stops

Common causes

most common: Carbon buildup in the throttle body
common: Vacuum leak
common: Faulty idle air control (IAC) valve on older models
less common: Leaking PCV valve or hose

How to fix it

Fix	DIY?	Typical cost
Clean the throttle body	Yes	$10–40
Find and repair vacuum leaks	Yes	$10–100
Replace a faulty idle air control valve	Yes	$50–200

Frequently asked questions

Can I drive my GMC with a P0507 code?

Yes, but the high idle wastes fuel and makes the truck creep at stops. Fix it soon.

Why does P0507 happen on GMC trucks and SUVs?

Carbon buildup in the throttle body is the most common cause on GM engines. Vacuum leaks and a sticking idle air control valve on older models also cause it.

How much does it cost to fix P0507 on a GMC?

A throttle body cleaning costs $10–40, a vacuum leak fix runs $10–100, and a new idle air control valve is $50–200.