GMC Sierra 2500 owners have reported 2 problems related to axle shaft seal (under the power train category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of GMC Sierra 2500 based on all problems reported for the Sierra 2500.
2004 GMC 2500 hd. Purchased my truck in fall of 2003. My speedometer stopped working properly. Truck only has 45k miles. Dealership advised the instrument cluster panel was bad needed to be replaced. New part is @ $210. 00 plus labor. The seal on my right front axle is also starting to leak.
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: the contact stated while the vehicle was parked on a hill with the parking brake engaged, the vehicle rolled backwards without warning. The contact was inside the vehicle, and managed to avoid a crash by applying brake pressure. The vehicle was inspected by a dealer, who determined a large amount of grease was present on the parking brake shoe from a leaking right rear axle seal. The right rear axle seal was replaced, but afterwards the problem persisted. The contact inspected the vehicle, and determined the left rear axle seal was leaking and needed to be replaced. The manufacturer was alerted.