Close

GMC 3500 Pickup Rough Idle

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

What are common reasons my GMC 3500 Pickup has a rough idle?

While there are a variety of reasons your GMC 3500 Pickup 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.
34%
of the time it's
Vacuum Leak
21%
of the time it's
Spark Plugs
15%
of the time it's
Ignition Coil

Get your GMC issue diagnosed by a professional

Find a high quality auto repair shop or dealer near you
x

Related GMC 3500 Pickup Questions

See what others are asking about their GMC 3500 Pickup. Get answers from RepairPal's community of auto experts and enthusiasts.
Engin warm driving on road, stop at light engine rough, take off gain speed engine smooths out. put injector cleaner ...

Related GMC 3500 Pickup Problems

Find the most common driver-reported problems that are to blame when a GMC 3500 Pickup has a rough idle.
The distributor may develop internal faults. this can cause a rough running engine or stalling condition, the check e...

GMC 3500 Pickup Rough Idle Repair Symptoms

A failing ignition coil will create misfires in the engine, and lead to hesitation, extreme power loss, engine stalling, poor fuel mileage, and illumination of the check engine ...Read More
As we discussed, spark plugs are necessary for any gasoline engine to run. When they fail, the engine is in a constant state of attempting to ignite air and fuel, but cannot. Th...Read More