You may need to coat the valve lifters using prelube GM P/N 1052367 (Canadian P/N 992869) or the equivalent, then install the valve lifters in their original locations, next install the lifter guide, and apply thread lock GM P/N 12345382 (Canadian P/N 10953489) or the equivalent to the lifter guide bolt threads and install the bolts, then tighten the bolts to 10 N.m (89 lb in), install the valve rocker arms and pushrods, the lower intake manifold and the valve rocker arm cover.
By BobGM Specialist
02/11/2022