Fuel Injector Cleaning and Inspection

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

IMPORTANT: If reusing the old injectors perform the following:

Use a soft bristle non-metallic brush and top engine cleaner, GM P/N 1052626 or equivalent, to remove any deposits from the nozzle tip (1) and the copper washer sealing area (2) before reinstallation.
Inspect the fuel injector nozzle tip (1) for any signs of discoloration (dark yellow, tan or blue) due to excessive heat.

Fig 1: View Of Fuel Injector Nozzle Tip & Copper Washer Sealing Area
Courtesy of GENERAL MOTORS CORP.
Replace the injector if any damage is found.
Clean the fuel injector high pressure line.
Inspect the fuel injector line for excessive corrosion or damage to the sealing surfaces (1, 2). Replace the line if any damage is found.

Fig 2: View Of Fuel Injector Line Sealing Surfaces
Courtesy of GENERAL MOTORS CORP.