GMC C2500 Repair Question
Topics covered: Engine, Automatic transmission, Idle air control valve.
Mileage: No information provided.
Mileage: No information provided.
Asked on November 17, 2007
Engine idle
I have a 1990 GMC 2500 Sierra with automatic transmission and 350 engine or 5.7 with 50,000 miles. I just replaced the engine and when I started it it will not idle but runs at about 4000 RPM's. What wrong?
Asked by TomhepAnswer
Replied on November 18, 2007
Check the idle air control valve and throttle position sensor
