Sierra 1500 2WD V8-5.3L Hybrid (2004)
passages.
IMPORTANT: Before removal, if necessary, clean the fuel rail assembly with a spray type engine cleaner, use GM X-30A or equivalent. Follow the
package instructions. Do not soak fuel rail assembly in any liquid cleaning solvents.
1. Remove the fuel rail.
2. Remove the fuel injector lower O-ring seal (4) from each fuel injector, if necessary.
3. Discard the O-ring seal.
INSTALLATION PROCEDURE
1. Lubricate the NEW fuel injector lower O-ring seals (4) with clean engine oil.
2. Install the NEW O-ring seals (4) onto each injector, if necessary.
