Having problems with your GMC Sierra 1500 ?
Over revving When starting the car the auto choke always activates even when the engine is at normal operating temp. it does settle down after about 20 or so seconds, and returns to normal idle. when driving all is ok but upon braking and coming to a stop the engine revs are at 1200rpm and again it takes about 20 seconds before returnig to idle, at times when you are driving and take your foot of the accelerator the car takes a few seconds to realise that the accelerator has been released. Can s
I don't know the year but it could be a defective IAC solenoid. If its an older truck then it could be a throttle cable.
Repair Help & Product Troubleshooting for GMC Sierra 1500
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