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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1309 (Engine Controls And Fuel - 4.3L - Introduction (2 Of 2)) >> Repair Instructions >> Fuel Pressure Relief (Without CH-48027) >> Fuel Pressure Relief Procedure

Fuel Pressure Relief Procedure

WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. If the fuel system requires repair, prevent fuel spillage by removing the fuel pump fuse. Refer to Electrical Center Identification Views .
  2. Loosen the fuel fill cap in order to relieve the fuel tank vapor pressure.
  3. Remove the engine cover, if required.
  4. Remove the fuel rail service port cap.
  5. Wrap a shop towel around the fuel rail service port and using a small flat-bladed tool, depress (open) the fuel rail test port valve.
  6. Remove the shop towel from around the fuel rail service port, and place in an approved gasoline container.
  7. Install the fuel rail service port cap.
  8. Install the engine cover, if required.
  9. Tighten the fuel fill cap.
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