Table 1 shows six common gasoline fuel system related problems of the 1999 GMC Sierra. The number one most common problem is related to the fuel pump (five problems). The second most common problem is related to the gasoline fuel system (five problems).
| Problem Category | Number of Problems |
|---|---|
| Fuel Pump problems | |
| Gasoline Fuel System problems | |
| Tank Assembly problems | |
| Fuel Hoses Lines/piping And Fittings problems | |
| Fuel Injection problems | |
| Tank Mounting problems |
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. Read details...
: the contact stated there were two problems with the vehicle. First, the fuel gauge worked intermittently, but the vehicle has not been inspected by the service dealer concerning this issue. There were no warning indicators prior to the intermittent failure of the fuel gauge. Read details...
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. Read details...