2007 GMC sierra Classic sle 5.3 liter My Engine is sluggish off the line or when stomping on the gas. Also sluggish when a/c is on. Things I've done to correct or help it to no avail. Changed spark plugs and wires. Cleaned MAF sensor. Cleaned throttle body. Checked for leaking intake. Changed catalytic converters. Has anyone had this problem or know how to or what to do to correct it. Thanks in advance
have the same problem?
Thursday, July 11th, 2013 AT 9:53 AM