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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My two cents is what the OP wants to do WILL give him more power, but NOT more towing capacity. There's a difference that shouldn't be confused.
Bill
Bill
