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Home >> Chevrolet >> 2012 >> Chevy Express H1500, Van Cargo >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Controls And Fuel - 4.8L, 5.3L, 6.0L - Repair Instructions >> Repair Instructions >> Compressed Natural Gas Tank Replacement - Aft Tank >> Removal Procedure

Removal Procedure

  1. Raise and properly support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Vent both aft fuel tanks if replacing one using the Compressed Natural Gas Tank Venting .
    3. WARNING:

    Refer to Battery Disconnect Warning .

  3. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
    4. Fig 1: Manual Tank Valves
    GM2567262Courtesy of GENERAL MOTORS COMPANY
  4. Close the manual tank valve(s).
    5. Fig 2: Pressure Relief Device (PRD) Lines
    GM2567384Courtesy of GENERAL MOTORS COMPANY
  5. Support tank assembly with aft axle tank cradle.
  6. Remove the trailer hitch. Refer to Trailer Weight-Distributing Hitch Platform Replacement .
  7. Disconnect the electrical connections.
    8. NOTE:

    Do Not remove "Live" pressure relief device (PRD) lines.

  8. Disconnect the fuel line fittings.
    9. Fig 3: Aft Tanks And Retaining Straps
    GM2567401Courtesy of GENERAL MOTORS COMPANY
  9. Remove the bracket support nuts and lower aft axle tank assembly.
  10. Disconnect the aft tank fuel lines.
  11. Remove the aft tank retaining straps.
  12. Carefully remove the aft tanks from the vehicle.
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