Chevrolet Avalanche 1500 Rough Idle

Learn if it's a simple fix or time to seek out a trusted technician.

What are common reasons my Chevrolet Avalanche 1500 has a rough idle?

While there are a variety of reasons your Chevrolet Avalanche 1500 has a rough idle, the most common 3 are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil.
of the time it's
Vacuum Leak
of the time it's
Spark Plugs
of the time it's
Ignition Coil

Get your Chevrolet issue diagnosed by a professional

Find a high quality auto repair shop or dealer near you

Related Chevrolet Avalanche 1500 Questions

See what others are asking about their Chevrolet Avalanche 1500. Get answers from RepairPal's community of auto experts and enthusiasts.
When in running the idle is rough and when engaged its shimmy.
No fuel present at injector valve on top of MOTOR. suspect anti-theft engaged don't know location could also be emerg...
Chevrolet Avalanche 1500 Repairs and Prices
All costs based on RepairPal Fair Price Estimate™ averages. Actual prices may change depending on final diagnosis.

Chevrolet Avalanche 1500 Rough Idle Repair Symptoms

A failing ignition coil can create several symptoms: Check engine light comes on Engine runs poorly or stall Increased emissions Reduced fuel economy Car won’t start I...Read More
When spark plugs fail, the engine will struggle. The check engine light will come on, and it may appear either solid or flashing. The driver would likely notice one or more of t...Read More