Table 1 shows two common other fuel system related problems of the 2021 GMC Sierra 1500. The number one most common problem is related to the other fuel system (22 problems). The second most common problem is related to the other fuel system hoses lines/piping, and fittings (one problem).
| Problem Category | Number of Problems |
|---|---|
| Other Fuel System problems | |
| Other Fuel System Hoses Lines/piping, And Fittings problems |
Engine developed a low knock type noise just above idle while beginning to move in the parking lot. It was also noted pulling away from an intersection at low rpm under light acceleration. Oil pressure was normal, 30 psi and approximately 50-60 at cruising speed. Read details...
While driving during winter conditions with temperature at 3 degrees on a residential street with limited traffic, the diesel fuel in the fuel filter gelled up which caused the vehicle to display reduce power mode and then immediately shut off and would not start. Read details...