One problem related to power train driveline has been reported for the 2002 GMC Sierra 2500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 GMC Sierra 2500 based on all problems reported for the 2002 Sierra 2500.
Limited slip differential causing loss of control on icy roads. I recently lost control of my truck while driving about 45mph on an icy highway in boulder, CO. Because the loss was so instantaneous resulting in the truck spinning 90 degrees to the direction of travel, I question if the limited slip function would cause power to transfer to a wheel if it suddenly hit dry pavement, while the other wheel was spinning on ice, resulting in a spin out. This is only my theory but with 57 years of driving experience and the fact that I have had weird experiences with limited slip differentials in the past I thought my theory may have some validity. My concern is that there are millions vehicles with limited slip differentials on the road and if my theory is valid, perhaps many accidents are being caused by this option (which came as part of a package when I purchased my truck).