One problem related to crankcase (pcv) has been reported for the 2004 GMC Sierra 2500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 GMC Sierra 2500 based on all problems reported for the 2004 Sierra 2500.
The contact owns a 2004 GMC Sierra 2500. The contact stated that the vehicle had a massive oil leak. The vehicle was taken to the dealer where it was diagnosed that the fuel injectors were defective, which filled the crankcase full of fuel and was a known issue. The vehicle would have been repaired per an extended warranty; however, it fell outside of the parameters of the extended warranty, increasing the risk of an engine compartment fire. The manufacturer was notified of the failure. The failure mileage was 112,000.