Service 4 wd system
1999 Chevrolet Silverado 1500

Service 4 wd system

(1999 Chevrolet Silverado 1500)
I have a late model 07.5 2500hd the service 4 wd system light came on and I lost 4 wd. The switch lights would come on when starting but would go off when started and the service 4 wd system alarm would come on. I checked the forum and found out what sounded to read like what mine was the, so I replaced the transfer case module. Did not fix the problem. After reading more on the forum, sounded like it could be the ground, removed and totally cleaned and rebolted with all new bolts, still did not fix the problem. Now I checked fuses, nothing found. Just about 24hrs before this happened I had no problems. I ran through a little puddle and that's when this all started. After waiting for my child to come out of School, I tried to start, and it was like the battery was dead, cleared my radio settings and than the next try it started right up. I'm disabled and can not afford to take it in, so I try to do all my own work useing the forum. This time I'm stuck. Any help appreciated.
How long have you had this problem? A day or so.
Tags: chevrolet, silverado 1500
1 answer & 0 comments
Popular Answer
on September 27, 2018
Unfortunately it is not likely anyone will be able to help out here online - can only post a list of the possibilities which isn’t going to help..

The transfer case module can be scan tested so the 4x4 operation can be viewed and can be texting for function y using the scanner .. This is the only proven method of successful diagnosis.

Good luck!
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General Diagnosis
$88 - $111 Learn More
on September 27, 2018
Unfortunately it is not likely anyone will be able to help out here online - can only post a list of the possibilities which isn’t going to help..

The transfer case module can be scan tested so the 4x4 operation can be viewed and can be texting for function y using the scanner .. This is the only proven method of successful diagnosis.

Good luck!
Sign in to reply

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