Where is the oil filter located on 1991 Chevy 4.3 blazer?

On a 1991 Chevy 4.3L Blazer, the oil filter is typically located on the passenger side (right side) of the engine, towards the front. It's usually fairly accessible, but you might need to maneuver around some hoses and wiring to get to it easily. Look for a cylindrical canister-shaped filter near the front of the engine block.