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GMC · Known Issues

1994 GMC C/K 2500 Problems: 2 Known Issues

1994 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated August 2026

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Issue summary

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum 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 with published estimates, repair costs range from $200 to $2,500. DIY maintenance guides at au7o.io.

In This Article

  • C/K 2500 Engine1
  • C/K 2500 Steering1
  • FAQ
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In This Article

  • Engine1
  • Steering1
  • FAQ

All 2 Known Issues

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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.

This issue also affects: Chevrolet C/K 2500

Common Symptoms

  • Stalling while driving
  • No start when hot
  • Hard starting

How to Fix

Typical repair cost:$300 - $2,500

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Community Reported
Medium Confidence

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.

Typical repair cost:$200 - $500

Research This Issue

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Community Reported
Medium Confidence
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Frequently Asked Questions

What are the most common GMC C/K 2500 problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 1994 GMC C/K 2500 has 2 documented issues. The most frequently reported are: 6.5L Diesel PMD/FSD Module Failure, Pitman Arm and Idler Arm Wear. Of these, 1 is rated critical and should be addressed promptly.

Is the GMC C/K 2500 reliable?

The 1994 GMC C/K 2500 has 2 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 1 issue is rated critical: 6.5L Diesel PMD/FSD Module Failure. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common GMC C/K 2500 problems?

Repair costs for known GMC C/K 2500 issues range from $200 to $2,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, 6.5L Diesel PMD/FSD Module Failure, typically costs $300-$2,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 1994-2000 GMC C/K 2500 6.5L Diesel PMD/FSD Module Failure?

Same 6.5L diesel injection pump PMD failure as Chevrolet C/K 2500. The Pump Mounted Driver overheats and causes stalling. Repairs typically run $300-$2,500. Severity: high.

What is the 1990-1998 GMC C/K 2500 Pitman Arm and Idler Arm Wear?

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. Repairs typically run $200-$500. Severity: medium.

Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.

Data compiled from NHTSA recalls, manufacturer TSBs, automotive forums, and AI-assisted research. No aggregated owner-report counts available for this vehicle yet.