Yukon XL 2500 2WD V8-8.1L VIN G (2004)
Important: The exhaust valve pushrods (2) are longer than the intake valve pushrods (1).
3. Install the valve pushrods.
4. Coat the valve rocker arm and valve rocker arm ball bearing surfaces with lubricant GM P/N 12345501 (Canadian P/N 992704), or equivalent.
5. Install the valve rocker arms, the valve rocker arm balls, and the valve rocker arm nuts.
Tighten the nuts slowly to 25 Nm (18 ft. lbs.) while guiding the tips of the rocker arms over the tips of the valves.
6. Install the valve rocker arm cover.
