GM Full Size Vans 1987-1997 Repair Guide

Relieving Fuel System Pressure

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Fuel pressure gauge J-34730-1A or its equivalent is required to perform this procedure.

  1. Disconnect the negative battery cable.
  2.  
  3. Loosen the fuel filler cap to relieve fuel tank pressure.
  4.  
  5. Connect the fuel pressure gauge to the pressure connection. Wrap a shop towel around the fitting while connecting the gauge to prevent spillage.
  6.  
  7. Install the bleed hose into an approved container and open the valve to bleed the system. The system is now safe for servicing.
  8.  
  9. Drain any fuel remaining in the gauge into an approved container.
  10.  

 
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