i just bought a 2004 gmc sierra extend cab slt i would like to find out what is the biggest tires i can put on this stock and what exaust would sound the best cat back and any other subjestions anyones got on how to make this a bad ass truck
new used truck
- Thread starter newgmc04
- Start date
Molson02536
New member
Log on to http://www.tirerack.com/ for your tire information and http://www.magnaflow.com/ for your exhaust. This should be a good start for you on getting your Sierra looking the way you want it to.
Molson02536
New member
Take note: if you do get a larger diameter wheel and tire combination, Have your transmission recalibrate for the extra strain on the drive line. What I have done in the past is raise the transmission line pressure by replacing the boost valve to 0.500" and replacing the Servo's with a corvette servo's in the 4L60E so the transmission will not slip between gears when shifting. Any transmission shop can help you do this mods to your transmission to ensure you'll have many trouble free years to come with larger tires.