One problem related to brake fluid leak has been reported for the 2007 GMC Sierra 1500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2007 GMC Sierra 1500 based on all problems reported for the 2007 Sierra 1500.
While driving vehicle, complete brake failure occurred. No traffic on road was able to coast to stop without accident. Quick inspection showed severe brake fluid leak. After towing, repair shop found ruptured hydraulic brake line due to corrosion, and multiple other similar weakened spots. All hard lines replaced. Manufacturer declined warranty assistance. Of note, vehicle purchased new, with no heavy duty use, nor high mileage. Original parts in my possession for verification.