2009 sierra denali lazy from a stop

[tooslow]

from a stop the truck seems lazy. Even if I stall it to 2000rpm. when I let off the brake, it just slowly accelerates to about 15mph. then after that it has full power. ive got all the tm turned off and PE mode changed.
any help will be greatly appreciated
I tried to attach the tune but wouldn't work

[HAWAIIZUKA]

stock size injectors? Need to take some time If it runs open loop on lower side.

[tooslow]

its all stock

[HAWAIIZUKA]

How about the open loop? any strange move in fuel trims? what did you change in PE?
MAF & O2 sensors are good?

[MStefak]

Keep in mind you are trying to move a 5500 lb truck plus you ... while powering AWD not 2wd .

Engine > Electronoc Throttle >Opening Rate - make sure its 100
Enigne > Torque MAnagament > ETC Rate Limit - make sure they are all 100

And lastly .. buy the LS7 throttle body. The Truck throttle bodies do not have a very strong motor in them so they will not open fast enough. The LS7 throttle body is slighty bigger ( no enough to care nor brag about ) but it has a bigger motor .. much bigger motor.

I researched this for awhile before finally bitting the whoopping 140 (with shipping ) cost from amazon.

Pulled the tables from a stock Zr1 file and viola ! nice touchy throttle response. Granted I have supercharged my Denali and was thoroughly pissed that the off the immediate throttle movement didnt give me the performance feel you even get from a damn 4 cylinder.

I also a few days later may have installed a 258mm triple disk 3200 stall torque converter from Chris at Circle D .. mmmm ..

Good luck. . you can bump the timing in the timing cells you hit upon initial throttle blip as well.