It's a new Denali so it has the 6 speed.
+1 love mine.

 

i love my 6spd...i dont have that issue with going from 20s to DRs

i do like that your truck went 12.8s @ 107 i need to look into making mine faster

 

im sure u can run that too high 12s im sure wanna know my lil secret

 

Just a shot in the dark too, are you turning off the traction/stability management? During the launch it could think it's powerhopping and pulling timing.

 

I could if i slap on a set of DRs im sure but i havent been racing my truck a lot

 

Dude you might get a kick out of this but the way I did it I removed my spare, removed the towing hich, removed the tailgate, removed the rear seats, removed the passenger seat and the center console, removed stock chrome 20s, and put 18" centerlines oh and let my 130lb brother to run it vs me a (267lb) guy lol weighted everything and saved nearly 500lbs took time but it help!

 

Yeah I turned it off by holding down 15sec to turn off the stablitrac but found out that I can pull the abs fuse and it'll help out I'ma have to try it after I get the truck back out the shop

 

Haha I was going to drop the spare next year when I go back to the track, never thought to go as far as pulling the seats, might have to just take it that extra step.

As far as someone else driving my truck? No way I would let someone else run it down the track unless they had the cash in pocket to fix anything that breaks.
Fuses is the way to go, never have to worry about forgetting to press it down and launching with it on.

 

Lol I was bored that day but it sure makes a difference, only person who I ever let run my cars is my lil bro @ 15 years he would take his 03 cobra to the track without no one knowing until I busted his *** but now he's my backup driver lol

 

15 and has a cobra?? dang