For GM SUV 4.8L 5.3L 6.0L 6.2L V8 1999-2013 Vortec Engine. LS R4 AC Compressor Bracket for FACTORY LS LQ LS2 LS3 LS6 Vortec Truck 1999-2013. 1x Alternator Bracket. Lightweight: The Truck Dual Alternator Bracket is designed to be lightweight and made of high quality 6061 aluminum for easy handling and installation.