GM Genuine Parts 12639250 LS Rear Block Cover

Customers find the rear block cover to be a genuine GM part that fits perfectly, particularly noting its compatibility with 2005 Chevy Avalanche models. The product effectively resolves oil leaks and comes with all necessary bolts, including upgraded 13mm heads. Customers appreciate its ease of installation, with one mentioning the included plastic guide for aligning the rear main seal, and consider it good value for money.