It directly replaces the automotive drive belt tensioner assembly with a pulley.
ALT Belt Tensioner for 96-14 Chevy GMC Cadillac Oldsmobile Isuzu Workhorse 38103
Belt Tensioner w/ Pulley Fits 1996-2003 Chevy S10 4.3L 89017309 10239670 38103
Belt Tensioner w/ Pulley Fits 1999-2013 Chevy Silverado 1500 4.3L 38103 12456152
Belt Tensioner Assembly with Pulley 38103 For 1996-2005 Chevrolet Blazer
ACDelco 38103 Accessory Drive Belt Tensioner Assembly
For BTA E3W0020BTA Belt Tensioner, V-ribbed belt E3W0020 Multi-V belt tensioner