Having problems with your 2007 GMC Sierra 1500 ?
How do I adjust idle speed after cleaning throttle body
The idle speed is computer controlled and shouldn't have to be adjusted in any manner nor is there an external adjustment screw [like old carburetors used to have] that you can turn to change anything. Usually what I find when I encounter an engine that is running too fast or slow is that there is another problem that is causing this condition. If your "check engine" lamp is on there should be a service code indicating a problem somewhere.
Repair Help & Product Troubleshooting for 2007 GMC Sierra 1500
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