I just bought a 04 ext.cab 2wd. Vin comes back to a 4.8L truck. Well I pop the hood and it says Vortec Max on the cover. The way i understand is the max is a 6.0 (lq9) right? Well the gauges are definetly not factory either, They have silver around the tach and speedo, the speedo registers 120mph, and increases in 20mph incraments. and it has a trans temp in the bottom left. It also has electric fans, dont know if they work yet but it doesn't overheat. Revs way past 6 grand so i dont know if its tuned or not. I just thought someone could shine some light on this for me and let me know what i got myself into.