OEM Chevrolet Avalanche 2500 Fuel Rail

Chevrolet Avalanche 2500 Fuel Rail Parts and Q&A

• Fuel Rail
  97208075
  Q: How to service the fuel rail assembly on Chevrolet Avalanche 2500?

  A:

  The first step for servicing the Fuel Rail assembly involves lowering fuel system pressure while cleaning the assembly with gm x-30a engine cleaner along with other equivalent products without allowing it to sit in liquid cleaning solvent. The service procedure begins with removing the engine sight shield bracket nuts followed by unmounting the bracket and then disconnecting the generator harness connector and evaporative emission canister purge valve harness connector and throttle position sensor harness connector along with the electronic throttle control harness connector. After removing the bracket studs from the upper engine wire harness it should be positioned aside so that each connector can be identified with its matching injector based on firing sequence. Locate the white portion on each injector connector then grip and carefully lift the top section of connectors only until exceeding the white area. Next, press the lower tab to unlock the connector. The process starts by disconnecting both the fuel feed pipe and return pipe from the Fuel Rail as a first step followed by disconnection of the line that supplies vacuum to the fuel pressure regulator. First remove the Fuel Rail attaching bolts then take off the assembly before extracting one injector lower o-ring seat from each injector and discarding its seal. Clean engine oil must be used to lubricate new lower injector o-ring seals before placing them onto each injector spray tip. Install the Fuel Rail assembly to the Intake Manifold by applying gm p/n 12345382 (Canadian P/N 10953489) threadlock on the 5 mm (0.020 in) band of bolts with a torque of 12 n.m (106 lb in). Reinstall the fuel pressure regulator vacuum line together with the fuel feed and return pipes while verifying correct injector electrical placement for maintaining the engine firing sequence. Attach the upper engine wire harness bracket using its retainer studs and fasten up the nut to 10 n.m (89 lb in). The repair process requires reattachment of the generator harness connector along with the evap canister purge valve harness connector and throttle position sensor harness connector and electronic throttle control harness connector. Secure the engine sight shield mounting bracket bolts to 10 n.m (89 lb in) while tightening the nuts and fasten the fuel filler cap and connect the negative Battery Cable. A fuel leak inspection process begins with a two-second ignition on, followed by ten seconds of ignition off before repeating the procedure for visual inspection of fuel leakage. Mount the engine sight shield and fasten its bolts with a torque of 10 n.m (89 lb in).
• Fuel Rail
  97361353
  Q: How to replace the fuel rail assembly on Chevrolet Avalanche 2500?

  A:

  Recovery of the Fuel Rail assembly starts by exhaust fuel system pressure and removing the engine sight shield. The service technician should first disconnect the generator electrical connector followed by the evaporative emission (EVAP) canister purge valve electrical connector and then disconnect the electronic throttle control (ETC) electrical connector. The engine harness needs the bolt and studs removed while the position moves to the driver's side of the engine space. The fuel injector connectors need identification based on their firing order sequence before pulling each connector top up to reach the white area adjacent to releasing the tab that removes the injector connector. After disconnecting the fuel feed line from the Fuel Rail you must support the rail to stop damage to the injector electrical connector terminals and spray tips. Use caps and plugs to block entry of contaminants through the openings. Use gm x-30a engine cleaner to spray the Fuel Rail before you remove it with the Fuel Rail studs. Take out all the lower o-ring seals from each injector before disposal. The installation process requires the application of clean engine oil to new lower injector o-ring seals which must be placed on each injector spray tip end. Fasten the Fuel Rail and its studs with a torque of 12 n.m which equals 106 lb in. Secure the fuel feed line and attach fuel injector electrical connectors by matching each connector with its designated injector then turning injectors if necessary to prevent wire harness strain. Reorder all engine harness elements before installing the engine harness bolt and studs using a 10 n.m (89 lb in) torque value. Connect the etc electrical connector to its port and fit the evap canister purge valve electrical connector and the generator electrical connector. Place the engine sight shield along with the fuel fill cap while performing the reattachment of the negative Battery Cable. The inspection of fuel leaks requires turning on the ignition while engine power is off for 2 seconds followed by turning it off for 10 seconds and repeating the process of turning on the ignition before checking for any fuel leaks.