Genuine GM LS Rear Main Seal Assembly 12639250 – Fits LS1 LS2 LS3 L76 L77 L98

Factory replacement Genuine GM rear main cover assembly (rear main seal plate) part 12639250. Includes the plate, gasket, rear main seal, 12 M8 bolts, and a seal installation tool for easier installation. Designed for standard LS covers (wet sump / matching block casting).

Fitment:
- Suits LS engines: LS1, LS2, LS3, L76, L77, L98; also listed for LS7 & LS9 in many LS-series applications  
- Fits Holden models: Commodore VT, VU, VX, VY, VZ, VE, VF; Statesman / Caprice WH, WK, WL, WM, WN  
- Does not fit LSX blocks; verify block casting if unsure  
- OEM factory replacement for stock rebuilds or for rear main seal repairs

Important Note:
Always inspect block casting and rear main cover type — LS7 / LS9 versions may have different oiling layouts or dry sump configurations. This assembly is intended for standard LS rear main plate configurations.

Perfect for rebuilds, leak repairs, or factory-spec replacements where rear main sealing matters.