Removal Procedure

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Fuel Injector Electrical Connectors

Courtesy of GENERAL MOTORS CORP.

Remove the left fuel injection fuel feed pipes. Refer to Fuel Injection Fuel Feed Pipe Replacement - Left Side .
Remove the left fuel injection fuel return pipe. Refer to Fuel Injection Fuel Return Pipe Replacement - Left Side .

CAUTION: Label all the injector electrical connectors before the connectors are removed in order to prevent reconnecting to the wrong injector. Failure to properly connect the injectors in the correct sequence will cause severe engine damage.

Disconnect the engine wiring harness electrical connectors from the fuel injectors.

Fig 2: View Of Left Fuel Injector Bracket Bolts

Courtesy of GENERAL MOTORS CORP.

Remove the fuel injector bracket bolts.

Fig 3: View Of Special Tool J-46594 Installed In Bolt Hole In Fuel Injector Bracket

Courtesy of GENERAL MOTORS CORP.

Install the J-46594 (1) into the bolt hole in the fuel injector bracket.
Install a flare nut wrench onto the J-46594 and pull back away from the fuel injector, until the injector releases from its seat.
Remove the J-46594 .

Fig 4: View Of Left Fuel Injectors W/Brackets

Courtesy of GENERAL MOTORS CORP.

NOTE: The unique fuel injector flow rates are programmed into the ECM according to cylinder location. Mark the injectors for correct re-installation to the same cylinders. Failure to do so may result in a poor driveability condition.

Remove the fuel injectors with brackets.

Fig 5: Identifying Fuel Injector Copper Washers

Courtesy of GENERAL MOTORS CORP.

If necessary, remove the fuel injector bracket pins.
Remove and discard the copper washer from the fuel injector bore.
Remove and discard the O-ring from the fuel injector.