GM SIN HDC — SEALER) ........ceeceeeeeeees

For the GM SIN HDC.

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Procedure

1. 19. 0.034 PLUG, ENG BLK CORE HOLE 91-94 1(L19, L29,LX2) ..... AR 3826504
2. 21. 0.539 BEARING, CM/SHF (*14, 22,23, 98-99 1 (129, LX2).......... 1 12508996

Source: manual:GM_KEM_8.74L_Manual.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.