Roadmaster 1992

Relieving Fuel System Pressure


Remove the fuel tank cap and properly relieve the fuel system pressure before performing any work on the fuel system or fuel system related components. After the pressure has been released a small amount of fuel may be released when servicing a component. In order to reduce the risk of injury cover the component with a shop towel before disconnection. This will catch any fuel that may leak out. Properly dispose of the shop towel.

  1. Before servicing the vehicle, refer to the Precautions Section.
    Disconnecting the negative battery cable on some vehicles may interfere with the functions of the on-board computer systems and may require the computer to undergo a relearning process, once the negative battery cable is reconnected.

    If working near and/or around the SRS system and components, be sure to properly disable the SRS system. See disarming/arming the SRS system.

  3. Disconnect the negative battery cable.
  5. Remove the fuel cap.
    The internal constant bleed feature of the TBI system relieves pressure when the engine is turned OFF.

    Click image to see an enlarged view

    Fig. Fuel cap location sedan-1991-1993

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    Fig. Fuel cap location station wagon-1991-1993

  7. After servicing the vehicle and connecting the battery cable, use the GM diagnostic scan tool or aftermarket equivalent reprogram the necessary systems and components. Be sure to follow the scan tool manufacturer-s directions.