To keep fuel systems clean, TOP TIER detergent gasoline is recommended. See Fuel (Gasoline).
If TOP TIER detergent gasoline is not available, one bottle of GM Fuel System Treatment Cleaner added to the fuel tank at every engine oil change, can help. GM Fuel System Treatment Cleaner is the only gasoline additive recommended by General Motors. It is available at your dealer.
Fuel Rail and Injectors Cleaning and Inspection (LAF, LEA, or LUK) Fuel System Fuel Rail
Special ToolsEN-49245Fuel Injector Seal Installer and SizerEN-49247Injector Retaining Clip InstallerFor equivalent regional tools, refer toSpecial Tools.Disconnect the electrical connections from the fuelinjectors-(1).Note:Support the fuel rail along the bottom, indicated by thearrow. Support the fu ...