How much of a pain in the *** is it to tune an 07 Silverado with the 6sp LTZ package with HPT? I tried it on my friend's and it wouldn't even raise the speed limiter. I set the speed limiter to 318 mph and it would still cut off @ 98mph. Also I couldn't find the Spark Retard vs Torque Reduction table unless it's under another name. This sucks I have tuned other 07s with no problems but never an LTZ/w 6SP. I did my "Fail Of The Day" with this truck. Any help?????????? Thanks in advance all help is appreciated

 

Most all MPH options in a tuner is 256mph. 318 would be out of range and default back.

 

That's what has me pulling my hair out. I downloaded a stock tune file from the HP Tuners repository of an 07 A4 equipped Silverado for comparison reasons and it's totally different. The A6 tranny has the speed limiter parameters from 0 to 318 mph as opposed to 256mph on the A4.

 

http://www.hptuners.com/forum/showthread.php?t=13593

 

GMLAN>Calibration

 

Thanks guys, still kind of new to using HPT, it's a work in progress.