Power tech is The World Leader in High-Performance Engine Tuning Products. For use 2004-2006 GM Trucks / Hummers 4. 3/4. 8/5. 3/6. 0/8. 1L As seen in photos comes with everything Computer Unit Step-By-Step Installation Instructions Connector Cable TruckXPressions.com Key fob TruckXPressions.com Lariat 6 TruckXPressions.com sticker decals 1Black HyperTech sticker decal 1 White HyperTech Sticker decal This is untested but it doesn't look like it was ever used much if at all..