Power mods on Sierra 1500 CC with 5.3L
I have an 04 GMC Sierra 1500 crew cab with the 5.3L engine and 3.42 gears. The previous owner added 20" wheels and tires and a flowmaster muffler, otherwise the truck is stock. My Outback 30BHQ is a...
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The re-gearing might be worth it, but skip the power programmer. They add very little power and usually to get a 5 or 10 hp boost they require you to burn premium fuel.
Personally, my opinion is "you got what you got". If it doesn't do the job, you're better off buying one that can.
Personally, my opinion is "you got what you got". If it doesn't do the job, you're better off buying one that can.
