Originally Posted by NKPPhil

OK, Kevin, that's a very impressive weight reduction program. But I need to know if you're as serious as some of the guys I used to go to the track with in my youth. They would go racing with JUST enough gas in the tank to get there and race, and carry a 5-gal Jerry can to get home on. Are you that dedicated to lbs/hp?

Originally Posted by double047

Yes and actually its only a partial tune, haven't started dialing in the 6 speed transmission yet at all, I know we will see another .2 to .4 tenths improvement there as that's where a lot more is left on the table. I know this because we were able to do it on my 2010 CC that only had the 5.3 6L80 combo.

I did have over 600 lbs of weight reduction done, but now it's right around 400ish.

My truck weighs right at 4700 and I weigh 275 so my race weight is around 4975.

I ran the times posted below at this weight and with the following mods.

Nelson Tune, Volant CAI, Magnaflow Muffler, Deleted CATS.

As far as weight reduction here is what is removed from my truck.

Spare Tire
Storage Bin
Trailer Hitch
Jack & Tools
Spare Tire Winch
Factory Lift Blocks
Tow Hooks
Stock Muffler
3rd Cat & Flexpipe
Front Cats
Rear Seats
Rear Seats Belts

I did have all back plastics removed, tail gate, and center console for the SAR event but I had already put those item back on and they add up to around 125 lbs.

Originally Posted by BrutalSierra

Wow i hope my truck runs around that time. My tune is strong but again only partial. No TCM yet but feels like it could pull down a house. I wanted to remove my rear blocks. Did u torque them back to any specs when u reinstalled the u bolts?

Originally Posted by double047

You know on a lot of things I pay close attention to torque specs and I am sure that there are many who will say I should on the u bolts for the rear end.

To be honest, I have never torqued them on any of my trucks and I have had plenty and most of them have been lowered and or lifted and some of them have even been lowered and lifted and lowered again.

I usually just tighten them as tight as my 3/5" air ratchet (not impact) will tighten and then I finish snugging them up by hand with a 1/2" ratchet, switching back and forth from front to back and side to side to try and tighten them evenly.

I'm not recommending to anyone that this is the way they should do it, I'm just answering the question truthfully.

I'm sure some of the GM Tech guys on here can post the torque recommendations if you need them.

Originally Posted by 2001 Sierra

To my understanding I'd prolly go with the TVS 2300 as the LS9 has the 2300 but a hevy truck needs a bit more in the basement...............