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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 994 (Engine Mechanical - 6.6L (LLY)) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Fuel Injection Pump Cleaning and Inspection

Fuel Injection Pump Cleaning and Inspection

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the fuel injection pump adapter bolts.
  2. Remove the fuel injection pump adapter.
    3. Fig 1: View Of Fuel Injection Pump Adapter
    GM663766Courtesy of GENERAL MOTORS CORP.
  3. Remove the O-ring from the fuel injection pump and discard.
  4. Remove the O-ring from the fuel injection pump adapter and discard.
  5. Clean the fuel injection pump adapter mating surfaces.
  6. Clean the fuel injection pump mating surfaces.
  7. Inspect the fuel injection pump and adapter for damage.
    8. Fig 2: View Of Fuel Injection Pump & Adapter Inspection Areas
    GM663767Courtesy of GENERAL MOTORS CORP.
  8. Replace component if any damage is found.
  9. Install a new O-ring onto fuel injection pump.
  10. Install a new O-ring onto fuel injection pump adapter.
  11. Lubricate the O-rings with engine oil.
  12. Install the fuel injection pump adapter to the fuel injection pump.
    13. NOTE: Refer to Fastener Notice in Cautions and Notices.
  13. Install the fuel injection pump adapter bolts.

    Tighten:  Tighten the fuel injection pump adapter bolts to 21 N.m (15 lb ft).

    14. Fig 3: View Of Fuel Injection Pump Adapter
    GM663766Courtesy of GENERAL MOTORS CORP.
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