Fuel Rail and Injectors Installation (LTG)

Special Tools 

EN-47909  Injector Bore and Sleeve Cleaning Kit

For equivalent regional tools, refer to Special Tools .

Fig 1: Fuel Rail
Courtesy of GENERAL MOTORS COMPANY
1. Clean the fuel injector bore in the cylinder head using the EN-47909  kit.
2. Replace the fuel rail insulators, if necessary. Refer to Fuel Rail and Injectors Cleaning and Inspection . Replace the fuel rail bolts, if necessary.
3. Install the fuel rail (1) with injectors into the cylinder head evenly.
NOTE:

Mount the bolts evenly to avoid cocking of the fuel injectors during installation.

4. Hand start the 2 outer fuel rail bolts (2) to seat the injectors into the injector bores.
5. Hand start the remaining fuel rail bolts.
Fig 2: Fuel Rail Bolts In Sequence
Courtesy of GENERAL MOTORS COMPANY
CAUTION:

Refer to Fastener Caution .

6. Tighten the fuel rail bolts in sequence to 25 N.m (18 lb ft).
7. Connect the electrical harness to the fuel rail harness connections.
Fig 3: Fuel Injection Fuel Rail Noise Shield
Courtesy of GENERAL MOTORS COMPANY
8. Install the fuel injection fuel rail noise shield (1).