Follow the forum chain back. It's the CIG fuse in the fusebox, behind the ashtray by your left knee. (View Post)

Make sure the ASC (assist step control) disable switch is not pressed. The ASC has an error condition fault detector, and if it detects an error, it will disable the ASC until it has had 50 error fre… (View Post)

For your year, a P0401 indicates trouble areas in: - EGR valve stuck closed - Open or short in VSV circuit for EGR (that's the Vacuum Switching Valve) - Vacuum or EGR hose disconnected (or clogged, o… (View Post)

I don't have electrical schematics for your year and make, but have a set for my 2007 Suburban. They show a 25Amp circuit breaker, one for the left doors, and another one for the right doors. Can you… (View Post)