This Litens Serpentine Belt Drive Component Kit fits 2002-2009 Buick Rainier / Chev Trailblazer / GMC Envoy / Isuzu Ascender / Olds Bravada / Saab 9-7x w/4.2L. These kits make it easy to maintain your entire front end accessory drive system. Eliminate the need to search for individual parts by purchasing this all-in-one solution. Front end accessory drives require maintenance at specific intervals, and parts should be replaced as part of your regularly scheduled tune-up to ensure your vehicle is at its best. Each kit contains a Litens belt tensioner, Bando serpentine belt, and any necessary idler pulley(s). All required hardware is included for the installation . Application specific instructions are also conveniently included. All parts meet or exceed OE fit, function, and performance.