Fuel Injection Fuel Rail Assembly Replacement (6.2L LS3, 7.0L LS7)

Fig 1: View Of Fuel Injection Fuel Rail Assembly

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
Preliminary Procedures Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (LS7 or LS9) , Battery Negative Cable Disconnection and Connection (LS3) . Remove the engine sight shield covers. Refer to Upper Intake Manifold Sight Shield Replacement (w/o LS9) . Relieve the fuel system pressure. Refer to Fuel Pressure Relief (Without CH 48027) , Fuel Pressure Relief (CH 48027) .
1	Intake Manifold Bolt (Qty: 4) CAUTION: Refer to Fastener Caution . Procedure Apply a 5 mm (0.20 in) band of GM P/N 12345382 (Canadian P/N 10953489) thread-lock or equivalent to the threads of the fuel rail and intake manifold bolts. Tighten 10 N.m (89 lb in)
2	Stop Bracket (Qty: 2) WARNING: The fuel rail stop bracket must be installed onto the engine assembly. The stop bracket serves as a protective shield for the fuel rail in the event of a vehicle frontal crash. If the fuel rail stop bracket is not installed and the vehicle is involved in a frontal crash, fuel could be sprayed possibly causing a fire and personal injury from burns.
3	Fuel Rail Bolt (Qty: 4) Tighten 10 N.m (89 lb in)
4	Fuel Rail Procedure Use the J 37088-A Fuel Line Disconnect Tool Set and separate the fuel line. Apply a small amount of lubricant at the injector O-rings to seal properly. Special Tools J 37088-A Fuel Line Disconnect Tool Set