Hello, My name is Ryan. I have a 2004 GMC Sierra 2500, crew cab 4wd. My service 4wd light came on, and DTC p2771 was detected. I read that p2771 was 4wd module circuit problem.
About 1 year or 1200 miles ago, service 4wd light came on, and the dealership replaced the transfer case selector switch on the dashboard. The problem was solved for a while, and now it is having problems again.
I would greatly appreciate any assistance that you can offer.
About 1 year or 1200 miles ago, service 4wd light came on, and the dealership replaced the transfer case selector switch on the dashboard. The problem was solved for a while, and now it is having problems again.
I would greatly appreciate any assistance that you can offer.
Apr 30, 2010 at 10:34 AM