1991 GMC B-Series Engine Blocks
Select Your Submodel
-
Dura-Bond®Oil Galley Rear Main PlugGMC B-Series 5.7L 1991, Oil Galley Rear Main Plug by Dura-Bond®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability....Made with precision and quality in mindDesigned to meet your specific needs$8.24 - QualCast®Steel Expansion Plug KitGMC B-Series 1991, Steel Expansion Plug Kit by QualCast®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to...Made from high-strength materials for uncompromising durabilityDesigned to provide an excellent combination of price and quality$7.29
