K 1500 Yukon 4WD V8-5.3L VIN Z Flex Fuel (2003)
The fuel injector (1) is stamped with a identification part number (2). A four-digit build date code (3) indicates the month (4), day (5), year (6), and shift
(7) that built the injector.
1. Lubricate the NEW injector O-ring seals (2, 4) with clean engine oil.
2. Install the NEW injector O-ring seals onto the fuel injector.
3. Install a NEW retainer clip (1) onto the fuel injector.
4. Push the fuel injector (17) into the fuel rail injector socket with the electrical connector facing outward. The retainer clip (19) locks on to a flange
on the fuel rail injector socket.
5. Install the fuel rail.