1999 GMC Sierra electrical system problems
12 owner complaints filed with NHTSA name the electrical system on the 1999 GMC Sierra — 2% of all complaints for this model year.
What owners report
“When I'm driving down the road at night the dashboard flashes on and off. All of the guages go nuts and the engine dies. They tell me that the computer has been soaked with water and needs to be replaced. *ak”
filed Apr 25, 2004
“Fuel pump will over heat and than short out. Exhaust always rattles engine knocks cat. Converters went out digital display stopped working”
filed Dec 23, 2003
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
This Preliminary Information communication provides information to the technician about vehicles that have slip in forward ranges immediately after replacing the input housing. Technician will inspect the 3-4 clutches…
PIP5072 · Service Bulletin/Repair Instructions · issued Oct 30, 2012
Electrical System problems in other Sierra years
| Year | Reports | Share |
|---|---|---|
| 2017 Sierra | 6 | 10% |
| 2015 Sierra | 1 | 2% |
| 2014 Sierra | 9 | 9% |
| 2013 Sierra | 5 | 13% |
| 2012 Sierra | 7 | 24% |
| 2011 Sierra | 3 | 7% |
| 2010 Sierra | 4 | 12% |
| 2009 Sierra | 9 | 24% |
| 2008 Sierra | 15 | 22% |
| 2007 Sierra | 7 | 12% |
| 2006 Sierra | 7 | 13% |
| 2005 Sierra | 23 | 20% |
Other reported problem areas on the 1999 GMC Sierra
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.