Yep, sounds like you are. You should be able to flash the "2002 Silverado" tune in my post here and only need to change the VIN & speedometer calibration to match yours (that one's calibrated for 285's).
Yep, sounds like you are. You should be able to flash the "2002 Silverado" tune in my post here and only need to change the VIN & speedometer calibration to match yours (that one's calibrated for 285's).