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Home >> Pontiac >> 2001 >> Aztek Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1136 (Engine Controls - 6.0L - Alternative Fuels (Introduction)) >> Repair Instructions >> Fuel Tank Pressure Sensor Replacement >> Installation Procedure
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Installation Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra and 2004 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    CAUTION: Refer to Compressed Natural Gas (CNG) O-Ring Caution in Cautions and Notices.
    Fig 1: Identifying HPL Line Fittings
    GM763013Courtesy of GENERAL MOTORS CORP.
  1. Install the fuel tank pressure (FTP) sensor (2) into the high pressure lock-off (HPL) solenoid with new O-ring. Lubricate the O-ring with petroleum jelly.

    Tighten:  Tighten the fuel tank pressure sensor to 27 N.m (20 lb ft).

  2. Connect the fuel tank pressure sensor (1) connector.
    3. CAUTION: Refer to Battery Disconnect Caution in Cautions and Notices.
  3. Install the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure (Single Battery) Battery Negative Cable Disconnect/Connect Procedure (Auxiliary Battery) in Engine Electrical in the C/K Pickup Service Manual.
  4. Start the vehicle and inspect for CNG fuel leaks at the serviced fitting using the J 45878  or an equivalent liquid leak detector. See Special Tools and Equipment .
    5. Fig 2: View Of Fuel Tank And Fuel Tank Cover
    GM757009Courtesy of GENERAL MOTORS CORP.
  5. Install the tank cover (2). Refer to Fuel Tank Cover Replacement .
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