1994-2002 GM Trucks, Suburbans, Vans, Hummers, and some later model Hummers as well.

• DS4831-5288, 5459, 5521, 5521S, 5521WE, 5942

  • These are all superseded by the latest, 5521

• DORMAN 520-550

• Flight Systems AMPUMP

• 10238969

• 12552621

• 12561307

• 17800077

• 12561405

• 12558156

• 17800114

• GM 19208317

• GM 19208315

• GM 10225930

• GM 19209059

• DS4831-5068 or 5068S

• DS4831-5941

• 17800076

• 10225929

• 19208316

• 17800113

1994 Model Year ONLY HD non emissions trucks

GM documentation claims these only made it into cab and chassis trucks but we've seen them on normal trucks and Suburbans also.

This is a model year 2004 Hummer H1 specific DS4 pump. It used a Catepillar (CAT) ECM implemented by General Engine Products (GEP)

We can interchange these with a DS4-5521 but it takes a couple extra steps and has to be done custom by request.