GMC Sierra electrical system problems by year
249 NHTSA owner complaints name the electrical system across 25 Sierra model years. The most reported year is 2004 with 39 reports.
| Year | Electrical System reports | Share | Median mileage | |
|---|---|---|---|---|
| 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% | 67,435 mi | |
| 2007 Sierra | 7 | 12% | — | |
| 2006 Sierra | 7 | 13% | — | |
| 2005 Sierra | 23 | 20% | 60,000 mi | |
| 2004 Sierra | 39 | 21% | 62,000 mi | |
| 2003 Sierra | 31 | 15% | 62,250 mi | |
| 2002 Sierra | 6 | 2% | — | |
| 2001 Sierra | 13 | 5% | — | |
| 2000 Sierra | 12 | 3% | — | |
| 1999 Sierra | 12 | 2% | — | |
| 1998 Sierra | 9 | 5% | — | |
| 1997 Sierra | 12 | 5% | — | |
| 1996 Sierra | 5 | 2% | — | |
| 1995 Sierra | 4 | 2% | — | |
| 1994 Sierra | 4 | 2% | — | |
| 1993 Sierra | 5 | 7% | — | |
| 1992 Sierra | 1 | 3% | — |
Share is the fraction of that year’s complaints naming the electrical system. Raw counts are not adjusted for sales volume — years that sold more units naturally accumulate more reports.