The dealer says my suburban is possessed

[goose249]

I have an intermittent problem with my 99 Sub'n the dealer can't figure out. Every so often, my ABS light will go on on the dash, the cruise control won't work, the fan/heat/ac quits, the 4wd switches quit working, the rear defrost quits and the "service 4wd" light comes on. Minutes, hours or days later it fixes itself. The dealer has had it on the diagnostic computer numerous times (they even installed one in the vehicle) and it never throws a code. I've checked the grounding points under the dash (2 of them) and they were clean but I took them apart and cleaned them again. I used to be able to wiggle/replace the ECM1 fuse under the hood to fix it for a while but that doesn't work any more. Could it be a problem with the ECM? Has anyone had anything similar?

[asepgrad98]

clean all the grounds, not just the ones under the dash

[MustGoFaster]

could be a wire with a break or a worn piece of insulation grounding against the frame

[snoman]

could be a wire with a break or a worn piece of insulation grounding against the frame

 

<{POST_SNAPBACK}>

 

 

 

 

No a agree with the second post above about checking all grounds. This would be my first choice here given his problems because a bad ground or ground can really cause some strange electrical things to happen in a car that seem to have no "reason".