Welcome! I doubt you will be happy with any mods that will not void your warranty. A tune, CAI and exhaust upgrade will get you started. If you really want that beast to run you will have to get a turbo or supercharger and a stall converter. Getting a CC with 20's and only a 5.3 to push it around are some real tough things to overcome. Glad to have you here.
2006 Superior Blue Trailblazer SS AWD, Stock as a rock
Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).
Sold: 1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning
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