Performance Package - '19 Denali

[paradox27]

I have a 6.2L 2019 Sierra Denali and I had the performance package installed a couple of months ago. 

Is there any reprogramming needed for either the CAI or exhaust? If there is, can anyone provide me some documentation on it to provide to my dealer if needing to battle them?

 

My dealer is telling me no reprogramming is needed and the install invoice doesn't indicate any reprogramming was done. I've seen some posts saying that the reprogram for CAI is required for the MAF.

 

I've given it a little bit of time to relearn if it was going to, but I have a couple concerns.

 

1. Shifting isn't as buttery smooth as it was before and I seem to notice a hard shift in 2nd or 3rd gear.

2. It doesn't seem as responsive or have as much pick up as my friends Denali without the package.

3. MPG has dropped. I barely get 20 on the highway now. Not as concerned about this because it is a truck after all, just thought it wouldn't significantly decrease with normal foot into it

 

Overall I am happy with the sound of it all, just wondered what other's experience and thoughts were.

[CamGTP]

If there is a GM cold air intake installed, there is a MAF calibration change offered with it. It's part of the deal.

 

It's not a must do thing though. All the other cold air intake system do not require any calibration changes and those truck all perform just fine.

 

The exhaust requires no change to anything as it's just a cat-back system.