GM Lumina/Silhouette/Transport APVs 1990-1999 Repair Guide

Relieving Fuel System Pressure


Observe all applicable safety precautions when working around fuel. Whenever servicing the fuel system, always work in a well ventilated area. Do not allow fuel spray or vapors to come in contact with a spark or open flame. Keep a dry chemical fire extinguisher near the work area. Always keep fuel in a container specifically designed for fuel storage; also, always properly seal fuel containers to avoid the possibility of fire or explosion.

  1. Disconnect negative battery terminal to avoid possible fuel discharge if an accidental attempt is made to start the engine.
  3. Loosen fuel filler cap to relieve tank vapor pressure.
  5. The internal constant bleed feature of the TBI relieves fuel pump system pressure when the engine is turned OFF . Therefore, no further pressure relief procedure is required, other than allowing 5-10 minutes for system pressure to dissipate.