CHEVROLET BLAZER REPLACE/REMOVE

I've Heard That You Are Unable To Swap A 97' Blazer Engive With A 95' Blazer, Because Of Them Having Different Computers In Them. Is This...

I Am Not New To Changing Parts On Engines But This One Is Baffeling Me Where Is It Located And How Do I Change It?

Other Category Problem 1996 Chevy Blazer V6 All Wheel Drive Automatic 115000 Miles I Replaced The Theromstat And The Engine Still Does...