GMC Sierra 1500 owners have reported 1 problem related to transmission fluid leaking (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 1500 based on all problems reported for the Sierra 1500.
Vehicle has roughly 52,000 miles on it. Noticed leak on passenger side, front. Opened hood, noticed fluid dripping down radiator. Took to garage, dealer identified radiator and ac system had leaks. Not covered under warranty.
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