Model 700 TBI Unit (2.5L)
WARNING: This page does not describe the selected car, but rather 35 other vehicles, including the 1992 Pontiac Trans Sport, 1992 Oldsmobile Silhouette, 1992 Oldsmobile Bravada, 1992 GMC Yukon, and 1992 GMC Vandura Special. However, it is still accessible from the selected car via links, so may be relevant.
Place transmission gear selector in Park (Neutral on manual transmissions). Set parking brake, and block drive wheels. Loosen fuel filler cap to relieve tank pressure. Disconnect 3-terminal electrical connector at fuel tank. Start engine, and allow to run until engine stalls due to lack of fuel. Crank engine 3 seconds to remove any fuel pressure left in fuel lines. Fuel lines are now safe for servicing.