For 1990-2009 cars only
- Apply sealer GM P/N 12378521, (Canadian P/N 88901148) or the equivalent to both sides of the crankshaft rear main bearing cap (1).
- Install the oil pan gasket.
- Install the oil pan.
- Install the oil pan bolts.
- Prior to tightening bolts, ensure that the oil pan boss sits flush with the engine block boss (1). Tighten the oil pan bolts to 25 N·m (18 lb ft).
- Install the oil pan side bolts and tighten to 50 N·m (37 lb ft).
- After tightening bolts, recheck to ensure that the oil pan boss sits flush with the engine block boss (1).
- Install the oil pan drain plug and tighten to 25 N·m (18 lb ft).
Note: Replace the two rear bolts that bolt the oil pan to the engine block, next to the rear main seal, with two NEW bolts (P/N 11515756). Prior to installing the new bolts, apply threadlocker G/M P/N 12345382 (Canadian P/N 10953489) to the threads.
Caution: Refer to Fastener Caution in the Preface section.
