Installation Procedure

WARNING: This page is about a different variant/trim than selected.

Clean the fuel injector bores and clean the fuel injectors, if the fuel injectors will be re-installed. Direct Fuel Injection Fuel Rail Cleaning and Inspection
Courtesy of GENERAL MOTORS COMPANY

NOTE:
Do NOT use any type of lubricant when installing the NEW combustion fuel injector seal on the fuel injector tip.

Install the EN-51955-2 short protector (4) onto the fuel injector tip. Place a NEW combustion fuel injector seal (2) on the EN-51955-2 short protector (4).
Using the EN-51955-4 pusher (3), install the combustion fuel injector seal (2) into the recessed area (1) of the fuel injector, then remove the EN-51955-2 short protector.
Courtesy of GENERAL MOTORS COMPANY

Compress the combustion fuel injector seal (1) using the EN-51955-3 pre-sizer (2).
Courtesy of GENERAL MOTORS COMPANY

Using the EN-51955-5 Fuel Injector Seal Sizer (2), resize the combustion fuel injector seal (1).
Install a combustion fuel injector seal on each of the remaining direct fuel injectors using the same procedure.
Courtesy of GENERAL MOTORS COMPANY

NOTE:
Check that the gaps of the two fuel injector seal retainers are aligned.

Fuel Injector Seal Retainer - Red (3) - Install [3x]
Fuel Injector Seal Retainer - White (2) - Install [3x]
Fuel Injector Seal (1) - Install NEW [3x]
Direct Fuel Injection Fuel Rail - Install - Direct Fuel Injection Fuel Rail Replacement
Perform the fuel pump trim reset. Fuel Pump Trim Reset