GMC Fast idle problem
May 29th, 2022
I have a 2001 Sierra with a fast idle.(3000 rpm) I have found no vacuum leaks and have changed the TPS, IACV, intake gaskets, EGR valve gasket and have disconnected the fuel injectors one by one with no change. I do not know what to look at next to fix the problem. The only thing else I can think of is the ECM ?