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Home >> Chevrolet >> 2005 >> Chevy Express G3500, Van Passenger, LQ4/KL8 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 6.0L (CNG) - Introduction >> Repair Instructions >> Fill Line Replacement (Passenger/Cargo) >> Removal Procedure

Removal Procedure

    CAUTION: Refer to Compressed Natural Gas (CNG) Flammability Caution in Cautions and Notices.
    CAUTION: Refer to Compressed Natural Gas (CNG) Fuel Pressure Relief Caution in Cautions and Notices.
  1. Relieve the CNG fuel system pressure. Refer to Fuel Pressure Relief Procedure .
  2. Disconnect the negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE in Engine Electrical.
  3. Raise the vehicle. Refer to LIFTING AND JACKING THE VEHICLE in General Information.
    4. Fig 1: Check Valve, Fill Line & Restraints
    GM924841Courtesy of GENERAL MOTORS CORP.
  4. Disconnect the fill line fitting (7) at the fill valve and discard the O-ring.
  5. Disconnect the fuel line fitting (10) at the check valve (11) and discard the O-ring.
  6. Remove the P-clamp screw (8).
  7. Remove the fuel line from the vehicle.
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