What size are gm 3800 3.8l bellhousing bolts?
The size of the bellhousing bolts for a GM 3800 Series II 3.8L engine is 7/16"-20. However, it's crucial to verify this with a parts catalog or a service manual specific to your vehicle's year and model. Bolt length may also vary slightly depending on the transmission used. Always double-check before purchasing or using bolts.