I have done some research on the site and posted a few things on wha was happening to my truck.

First of all thanks to all that help me so far. Ok first of I a HRVP and a tst pm3 and 100 sticks in the truck. I found out today that the tst box seems not to make the shudder. Because I took it out and test drove it with only the smarty on 9 and it still seemed to shudder but not as bad. I think that is because theres not as much fuel running, which makes sence. the only code I have was p602- ECm fueling calibration error. I think that was there beacause I tried to reset the AAP thinking that might help the truck.

Soon as of no I cleared the codes and I am running the truck for afew days then I will check them agian.

OH the HRVP is about 3 years old. The more the power the more the shudder is notice able.

Thank you for any info you can give me!

 

What RPM and speed might you be conceiving this malady?
AT rollout? Engine speed vib? Driveline in low gear? Tires wrinkling?
Vent vibrating at 90 MPH?

 

i t could be that your boost is too high for your rpm, mine has a "shudder" if i try to pull a hill too slow in sixth.... my boost guage will bounce dramatically untill i shift down or let off the throttle