1994 GMC Sonoma Problems: 2 Issues Every Owner Should Know
1994 model year · 0+ owner reports · Updated April 2026
According to Au7o's analysis of 0+ owner reports, the 1994 GMC Sonoma has 2 documented known issues. No issues are rated critical, indicating generally reliable ownership. Across all issues, repair costs range from $30 to $800. DIY maintenance guides at au7o.io.
All 2 Known Issues
On the 1991-2004 GMC Sonoma, same fuel pump failure issues as the S-10. The in-tank pump fails from heat and debris.
Common Symptoms
- Stalling
- Hard starting
- Loss of power at speed
How to Fix
Confirm low fuel pressure before replacing parts by checking pressure at the Schrader valve on the fuel rail; CPI/Vortec-equipped 4.3L trucks are especially sensitive and typically need about 60-66 psi to start and run correctly, while weak pressure, intermittent drop-out, or excessive current draw points to a failing in-tank pump. Inspect the fuel pump relay, fuse, ground at the frame, and the pump electrical connector for heat damage, then replace the complete in-tank fuel pump module/strainer and install a new fuel filter at the same time; on many Sonomas the tank must be lowered, though removing the bed can also improve access on some configurations. Use a quality Delco or Delphi module rather than a pump-only repair, and clean out any tank debris to prevent repeat failure. Typical repair cost is about $450-$900 parts and labor depending on engine, cab/bed configuration, and whether the sending unit harness also needs replacement.
What Owners Are Using
Parts and tips from 0+ owners who fixed this issue
- UpgradeDelphi fuel pump module — OE-quality direct replacement (Delphi Fuel Pump Module)
- UpgradeBosch fuel pump — reliable OEM alternative (Bosch Fuel Pump)
On the 1994-2004 GMC Sonoma, the plastic exterior door handles break at the pivot point, making it impossible to open the door from outside. The brittle plastic cracks in cold weather and from normal UV degradation over time.
Common Symptoms
- Door handle feels loose
- Handle snaps off
- Cannot open door from outside
- Handle moves but door will not open
How to Fix
Replace exterior door handle (Dorman 77072 driver, 77073 passenger). The replacement is straightforward with removal of the inner door panel. Consider replacing both sides preventively as they fail at similar rates.
What Owners Are Using
Parts and tips from 0+ owners who fixed this issue
- UpgradeTrim removal tool set for body panel work without damage (MICTUNING Trim Removal Tool Set)
- UpgradeBondo body filler for dent and panel repair (Bondo Body Filler Kit)