What causes P0507 on a GMC Sierra 1500?

Common causes of P0507 on GMC Sierra 1500: Vacuum leak at intake manifold gasket, brake booster hose, or PCV line; Dirty throttle body allowing excess air past the throttle plate; Failed idle air control valve (stuck partially open); Air leak in the PCV system (common on GM 2.5L and 1.5T engines).

P0507

P0507 GMC Sierra 1500

Q: How much does it cost to fix P0507 on a GMC Sierra 1500?

Fixes for P0507 on GMC Sierra 1500 include: Inspect and repair vacuum leaks (use propane or smoke test), Clean throttle body and perform idle relearn, Replace IAC valve or electronic throttle body if faulty, Check and replace PCV valve or valve cover (integrated PCV on some GM engines), Inspect brake booster check valve and hose for leaks.

Idle Air Control System RPM Higher Than Expected · Powertrain Code · Medium · Repair: Easy

What is P0507?

Idle speed is higher than the ECM expects. May be caused by a vacuum leak, stuck IAC valve, or throttle body issue.

When the GMC Sierra 1500 triggers code P0507 (idle air control system rpm higher than expected), it typically points to an issue in the powertrain system. Below you'll find the most common causes, symptoms, and repair options specific to the GMC Sierra 1500.

This repair is rated easy, meaning basic tools, no lift needed.

Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your GMC Sierra 1500.

Common Causes on GMC Sierra 1500

Vacuum leak at intake manifold gasket, brake booster hose, or PCV line
Dirty throttle body allowing excess air past the throttle plate
Failed idle air control valve (stuck partially open)
Air leak in the PCV system (common on GM 2.5L and 1.5T engines)

Symptoms

Check Engine Light on
Idle speed higher than normal (typically over 800-900 RPM)
Idle may not come down after revving the engine
Slight whistling noise from vacuum leak

Recommended Fixes

Inspect and repair vacuum leaks (use propane or smoke test)

Clean throttle body and perform idle relearn

Replace IAC valve or electronic throttle body if faulty

Check and replace PCV valve or valve cover (integrated PCV on some GM engines)

Inspect brake booster check valve and hose for leaks

Notes for GMC Sierra 1500

On GM vehicles, P0507 is most often a simple vacuum leak — a thorough visual inspection of all vacuum hoses usually reveals the source.

P0507 GMC Sierra 1500

What is P0507?

Common Causes on GMC Sierra 1500

Symptoms

Notes for GMC Sierra 1500

Check GMC Sierra 1500 Specs