GMC C/K 2500 Problems: 5 Issues Every Owner Should Know
1990-2003 model years ยท 210+ owner reports ยท Updated April 2026
According to Au7o's analysis of 210+ owner reports, the 1990-2003 GMC C/K 2500 has 5 documented known issues, with 3 rated critical. The most serious are In-Tank Fuel Pump Failure ($250-$700 repair), 6.5L Diesel PMD/FSD Module Failure ($300-$2,500 repair) and Brake Line Corrosion and Rust-Through ($400-$1,500 repair). The most commonly reported issue is In-Tank Fuel Pump Failure with 210 owner reports. Across all issues, repair costs range from $80 to $2,500. DIY maintenance guides at au7o.io.