Fuel Rail And Injectors Installation

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Fuel Rail and Injectors

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
1	Fuel Rail Insulator
2	Direct Fuel Injection Fuel Rail Assembly CAUTION: Make sure the fuel injectors are free from debris and lubricant. Lubricant can burn and ruin the fuel injector seals. CAUTION: The fuel rail assemblies must be drawn down evenly before final torque. Failure to draw down the fuel rail assemblies evenly may result in scoring of the lifter bores. NOTE: If re-using injectors be sure to replace lower compression seals. Do not lubricate the combustion seals when replacing. Clean the holes in the cylinder head of any debris or residual fastener thread sealant. Failing to do so can cause the bolts not to reach proper torque and/or clamp load. Refer to Fuel Rail and Injectors Cleaning and Inspection .
3	Fuel Injection Fuel Rail Bolt NOTE: Clean the threads and apply a threadlocker. Refer to Adhesives, Fluids, Lubricants, and Sealers . Tighten 25 N.m (18 lb ft)