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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 37 (Engine Mechanical - 6.6L - Off Vehicle Repair Instructions (2 Of 3)) >> Off-Vehicle Repair Instructions (Part 2) >> Fuel Injection Pump Cleaning and Inspection

Fuel Injection Pump Cleaning and Inspection

WARNING: This page is about a different variant/trim than selected.
  1. Remove the fuel injection pump adapter bolts.
  2. Remove the fuel injection pump adapter.
    Fig 1: View Of Fuel Injection Pump Adapter & Bolts
    GM663766Courtesy of GENERAL MOTORS CORP.
  3. Remove the O-ring from the fuel injection pump and discard.
    Fig 2: View Of Fuel Injection Pump & Adapter O-Rings
    GM663767Courtesy of GENERAL MOTORS CORP.
  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. 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.
    Fig 3: View Of Fuel Injection Pump Adapter & Bolts
    GM663766Courtesy of GENERAL MOTORS CORP.
    13. NOTE: Refer to FASTENER NOTICE .
  13. Install the fuel injection pump adapter bolts.

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

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