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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Changing to 4.10 gears will definitely help. However, you don't have enough truck for a 7500# Dry Weight trailer so your towing experience is still going to suck. That generation of 1/2 ton chevy's is practically limited to around 6,000# loaded TT towing weight (note I said loaded not dry meaning probably 4,500# dry). (I have a 1/2 ton '05 with your engine and heavy duty tow package, and absolutely would not tow your empty trailer with it, much less loaded. I love that 1/2 ton but it is just not enough for your trailer)
