INDUSTRIAL INJECTION DS4831-5521SE GM 6.5L REMAN DS INJECTION PUMP - 1994-2000 CHEVY/GMC (DS4-5521)

Restore factory fueling and driveability on your 1994-2000 GM 6.5L Turbo Diesel with the INDUSTRIAL INJECTION DS4831-5521SE remanufactured DS4-5521 injection pump. Professionally rebuilt, calibrated, and ready to install for reliable cold starts, smooth idle, and correct fueling under load.

Fitment

• 1994-2000 Chevrolet & GMC 2500/3500 pickups, SUVs (6.5L Turbo Diesel)
• 1994-2000 applications using DS4-5521 family pumps

What's Included

• Remanufactured DS electronic rotary injection pump (DS4831-5521SE)
• Pre-calibrated to OE spec; ready for installation

Recommended Parts (CPP Internal Links)

• PMD (FSD) & Harness Kit - 1994-2002 GM 6.5L
• PMD Extension Cable - 40" (Grey PMD)
• PMD Extension Cable - 72" (Grey PMD)
• PMD Resistor - 1994-2000 GM 6.5L

Cross-Reference / Alternatives

• Industrial Injection DS4831-5068SE - 1994 (verify tag DS4831-5068)
• Dorman 502-550 Reman Injection Pump - 1994-2000 GM 6.5L

Helpful Notes

• 1994 model year: verify your pump tag. If the tag is DS4831-5068, use the 5068-spec reman (see Cross-Reference above).
• Relocate the PMD/FSD off the pump and into cool airflow for best reliability (see Recommended Parts).
• Clear any stored DTCs and perform TDC offset learn after installation.

FAQ

Many 1994 trucks use DS4-5521, but some use DS4831-5068. Check your pump tag; if it's 5068, use the DS4831-5068SE unit linked above.

PMDs commonly fail from heat. We strongly recommend a fresh PMD, harness, and relocation with an extension cable.

No. This DS4 pump is for the earlier GM 6.5L engines. Duramax (6.6L) began in 2001 and uses a different common-rail system.

Yes-complete TDC offset learn and clear codes. Follow factory service procedures for best results.