Three problems related to electrical system have been reported for the 2004 GMC Sierra 3500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 GMC Sierra 3500 based on all problems reported for the 2004 Sierra 3500.
The fan for the heater doesnt work on all speeds properly, stopped working entirely.
Fuse box under hood caught fire while parked.
Speedometer erratically shows incorrect speed while driving. Sometimes displaying 120mph or 0mph. Very dangerous and should be a mandatory recall checked with dealer and would cost $800. 00 to replace bad instrument cluster. Only has 73,000 miles.
| Electrical System problems | |
| Alternator/generator/regulator problems | |
| Instrument Panel problems |