DrX

iTrader: (7)

I haven't looked at the tune for my 2010, but there is major downshift delay - like 3-4 sec - very annoying and dangerous as far as I am concerned.

Torque management could cause a reduction in throttle blade opening on launches. No lag on my 2004 for sure.

Parke10

iTrader: (5)

yup sure is,i compared my dads 05 and dreks 5.3 05 to my 06, night and day difference, its also the year they switched from a semi adjustable throttle pedal (u can rock it heal to toe) to a solid plastic style, not only are the TB's alot slower the the pedal in the 05and earlier and alot touchier/snappier.

ill see if i can get some vids this weekend.

Edit: i should note that the closing speeds are the same, but from 0-100%WOT,not in a gradual motion, just hammerin on it,its so.. blehh

Wheatley

iTrader: (12)

Electronic throttle in the trucks have been here since 01,only for those with traction control.
The 01 C3 denali was also electronic
2003 and up it was std.

BLACKND

iTrader: (5)

The 07+ trucks are further lagged by the addition of the computer operating system. The throttle body control is 100% controlled by the PCM. The blades open slower, rather than snapping open, thus the lag from a dead stop. My truck runs like a scalded dog from anything more than a dead stop.

Alot of it is the PE Values and Tq Management, mine had a real bad 3-4 second delay while driving and then going WOT. Thats gone now thanks to a Wheatley tune.

A good tune will make a world of difference to the truck, but there will always be a certain amount of lag of the line.


Parke10 is right on the speed of the TB's. Although, I want to say the 06-07 classic body style trucks could be changed to a quicker opening throttle body by using an 04-05 throttle actuator control module. I know I heard about that from someone a few years ago, but would have to do some more research on it.

BlackGMC

iTrader: (31)

Interesting, i just put a NNBS 87mm TB on my 2004, and looking at the logs, the TB opens to 100% in 2 frames (0.241 sec)...

azsierra

So can i get my truck tuned just to get rid of some of that lag?

BLACKND

iTrader: (5)

Definitely, just look for a reputable tuner that has some experience with these newer trucks. Mine is worlds different than it was brand new. I've got a few mods, but nothing major.

tiffo60

iTrader: (2)

My 02 denial is dbw and doesn't have any lag, but it's still slow lol

00Silv4.8

iTrader: (10)

it seems like my 03 is super sensitive to any sort of throttle. I just hate the feel of the pedal versus a cable TB. However my 03 seems to have virtually no lag. Like other have said, try a base tune, if you still have problems talk to a tuner and see if they can figure out what you're talking about and fix it.

Parke10

iTrader: (5)

When looking at mine,it shows it opening fast as hell, i dont remember exactly how fast, but the blade itself was no where near as fast as the computer was showing it.