Here's a link to a bunch of free mod's you can use. I don't think they have the hot water bypass mod thought. http://www.sshotrods.com/performance/gmtruck/
2001 GMC Sierra 4.8L, Cold Air Intake, Descreened MAF , Hot Water Bypass, Flowmaster 50 S, Superchips Miromax tunner, Vette Servo, .490 Boost valve, Denso Irridium plugs, Taylor 8mm Spiro Pro Wires,
3.73 open ,SS chrome Grille, Door Handles, SS Sport Mirrors, Belltech shackles,
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