GM Repair Problems? Ask GM Repair Expert Now.
the only problem i have seen on these is the prop shaft harness key some water in if and need to be replaced, this is the most common failure for a intermittent concern. locate C151 by the fuse block and inspect for water there and at the prop shaft speed sensor on the transfer case. im sending the wire harness part number also. with 2 wheel steer 15224663, without 4 wheel steer 15832722. good luck.and please accept my answer. thanks T-MAN