Stanadyne DS4 Fuel Injection Pump 05521S 1994-2002 GM 6.5L V8 Diesel

The 05521S is the DS4831-5521 electronic rotary injection pump for the 1994-2002 GM 6.5L turbo diesel, supplied under Stanadyne's S suffix part number. The DS4 meters and distributes fuel to all eight injectors from a single pumping element under electronic control.

Key Features

• Electronically governed DS4 rotary distributor design
• Meters and distributes fuel to all eight injectors from one pumping element
• Timed to the engine through the drive hub, with a pump mounted driver controlling the fuel solenoid
• Correct calibration matters: DS4 pumps are built to a specific tag number and are not interchangeable across calibrations

Fitment

1994-2002 GM 6.5L turbo diesel V8, in Chevrolet and GMC C/K, Suburban, Tahoe, Yukon, Express and Savana, G-series vans and P-series chassis, subject to the pump tag on your vehicle. Some 1994 trucks were built with the DS4831-5068 calibration instead. Check the tag on your existing pump before ordering.

Product Details

• Brand: Stanadyne
• Manufacturer Part Number: 05521S
• Pump model: DS4831-5521
• GM part numbers referenced: 12561307, 17800077, 19209059
• Sold each

GA05521S , 05521 , AP05521S , 10225930 , DT650003R , 12558156 , 12561405 , 12561307 , 17800114 , 05288 , 05459 , 19209059 , 19209060 , 17800077 , 19208315 , 19208317 , 502550 , DS48315521 , DS48315521S , DS48315942

Orders typically ship within 24–48 hours of being received, but because of vendor shipping times some orders may take longer. We ship within the United States only (48 contiguous states plus DC).

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