1994 GMC C/K 2500 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 C/K 2500 has 2 documented known issues, with 1 rated critical. The most serious is 6.5L Diesel PMD/FSD Module Failure ($300-$2,500 repair). Across all issues, repair costs range from $200 to $2,500. DIY maintenance guides at au7o.io.
All 2 Known Issues
On the 1994-2000 GMC C/K 2500 6.5L Diesel, same 6.5L diesel injection pump PMD failure as Chevrolet C/K 2500. The Pump Mounted Driver overheats and causes stalling.
Common Symptoms
- Stalling while driving
- No start when hot
- Hard starting
How to Fix
What Owners Are Using
Parts and tips from 0+ owners who fixed this issue
- UpgradeBluetooth OBD-II scanner for reading engine codes and monitoring live data (BlueDriver Bluetooth OBD2 Diagnostic Scan Tool)
- UpgradeQuality synthetic oil and filter combo for engine maintenance (Mobil 1 Full Synthetic Oil and Filter Bundle)
On the 1990-1998 GMC C/K 2500, the Pitman arm and idler arm ball joints wear out, causing excessive play in the steering and a wandering feel on the highway. The heavy front end of the 2500 accelerates wear on these components.
Common Symptoms
- Steering wander on highway
- Loose steering feel
- Uneven tire wear
- Play in steering wheel
How to Fix
Replace the idler arm (Moog K6187T) and Pitman arm together for even steering geometry. A front-end alignment is required after replacement. Inspect tie rod ends and center link at the same time.
What Owners Are Using
Parts and tips from 0+ owners who fixed this issue
- UpgradeMoog tie rod end — premium chassis component for steering repair (Moog Tie Rod End)
- UpgradePrestone power steering fluid for system top-off and service (Prestone Power Steering Fluid)