Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Knowing what those code numbers are will help me gain some insight on how to best help you. Any chance of getting them from you?
Thank you. Please give me a chance to review these codes. Be back in a bit...
OK. Since the BCM is the "boss module" and knowing there is a pattern of failure due to bad grounds, that's where I would start my diagnosis. Do you have access to a Tech-II or equivalent scan tool capable of communicating with the BCM?
The advantage of using the scan tool is that you can wiggle the harness and tug on the connectors and see if values change on the display. The option would be to do a complete pin-out, but doing that wouldn't reveal loose or intermittently bad connections, or tell us whether or not we have a bad module.
I can probably get you the connector pin-out. Are there 4 connectors going to the one you're working on? Also, can I get the VIN?
What about that VIN?
Well, there isn't much I can do without the VIN to look up the correct diagram. Any particular reason why you won't give me that information?
Man, I'm on your side, but you sure make it hard for me to try to help you. you see, without the VIN, I didn't know what the body style was or what engine and other features were in it, so I just went with what you gave me "2007 Yukon". I've attached the pin-out for connector X1.
Hope that helps you out.
Like I said, I'm on your side and all I want to do is help you. As it happens to be, the pin-out I uploaded for you fits that VIN - 2007 GMC Yukon 4WD 4dr 1500 SLT 5.3L Flex Fuel.
Please let me know if there's anything else I can do.
Please see attached graphics.