1999 GMC Sierra Fuel system Problems
- Complaints
- 26about this part
- Share
- 4%of 600 total for the year
- Median mileage
- 60,098miles
- Trend
- StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.
NHTSA recorded 26 complaints about the fuel system of the 1999 GMC Sierra, 4% of the 600 complaints for this model year. Where a mileage was given, the median is 60,098 miles. 1 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I was coming to a stop and I lost my brakes I was able to get it stopped. Took it to my mechanic right away and was told the brake line burst and hit my gas line busting it as well. They had the vehicle for over 3 weeks. They repaired the gas line easy enough but the brake line had to be completely replaced.”
NHTSA complaint #10628114, filed 2014-08, 172,656 miles“The rear strap that holds the gasoline tank in my vehicle broke due to corrosion of the strap. The tank stayed inplace until I could drive to the dealer to have it replaced. The dealer was not concerned and ordered the part and schedueld to replace it in a week.”
NHTSA complaint #10143268, filed 2005-11, 95,600 miles“The fuel gauge on my 1999 Gmc Sierra ext. Cab does not work. It has never worked. I did not see the problem as urgent until my brother-in-law, who has the exact same truck, got stranded in mexico because his fuel pump went out. He has had the same problem since he has had his truck and it cost him $300.00 dollars to change the fuel pump out. That was cheap because he did the work himself. I have done some research on the internet and have seen the same problem with several trucks of the same model and year. …”
NHTSA complaint #10172789, filed 2006-11, 50,000 miles“Gas tank gauge works once in a while. Our mechanic said it was probably due to moisture. Also, the rear differential cover is either cracking or rusting through. I put a new gasket on it and the next day it was leaking again but not at the gasket. About 1/3 up from the bottom, you can see where fluid is leaking through the cover. I called 2 dealers (1 chevrolet, 1 Gmc). They both gave me numbers to other dealers (1 in pa., 1 in ia., 1 in upper mi.). The two out of state dealers told me that the part was for a customer and would not sell it. The one in mi. …”
NHTSA complaint #10135006, filed 2005-08, 95,000 miles“Fuel pump/sending unit faulty. Gauge does not read proper fuel levels. One minute while going down road you have a full tank next minute light comes on fuel gauge reads empty. Sometimes gauge will not read fuel in tank at all. I have come across other Gmc owners who have the same complaint. Guys at shop say it is common to replace the fuel pump/sending unit.”
NHTSA complaint #10235887, filed 2008-07, 49,000 milesRelated service bulletins
- 10026704Aug 1, 2008Gmc: fuel gauge fluctuation in park or neutral, causing the low fuel light to illuminate.
- 10017191Oct 28, 2005Supplement to bulletin 99-06-04-047a for fuel system cleaning.
Fuel system: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2017 | 1 | 2% |
| 2015 | 2 | 4% |
| 2014 | 1 | 1% |
| 2013 | 3 | 8% |
| 2011 | 2 | 5% |
| 2010 | 1 | 3% |
| 2009 | 1 | 3% |
| 2008 | 2 | 3% |
| 2007 | 1 | 2% |
| 2006 | 2 | 4% |
| 2005 | 5 | 4% |
| 2004 | 8 | 4% |
| 2003 | 7 | 3% |
| 2002 | 3 | 1% |
| 2001 | 16 | 6% |
| 2000 | 22 | 5% |
| 1999 | 26 | 4% |
| 1998 | 12 | 6% |
| 1997 | 12 | 5% |
| 1996 | 19 | 8% |
| 1995 | 3 | 1% |
| 1994 | 15 | 8% |
| 1993 | 3 | 4% |
| 1992 | 1 | 3% |
| 1989 | 2 | 13% |
Other parts of the 1999 GMC Sierra
338 complaintsSuspension
39 complaintsVehicle speed control
39 complaintsTransmission and drivetrain
37 complaintsTires
31 complaintsBody and structure
30 complaintsSeats
23 complaintsSteering
18 complaintsVisibility (wipers, defrost, mirrors)
18 complaintsEngine cooling
17 complaintsSeat belts
15 complaintsAir bags
12 complaints
← All problems reported for the 1999 GMC Sierra
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology