Idles high without accelerating
Hello. Thanks for writing in about your 2002 GMC Safari. There are several components that may be causing this problem. There could be a bad throttle position sensor (https://www.yourmechanic.com/services/throttle-position-sensor-replacement), a throttle cable (https://www.yourmechanic.com/services/throttle-control-cable-replacement) that is sticking, or a vacuum leak....