How do you tell if you have GMPP Upgrade?
 

Hey, I want to get the upgrade but want to make sure i don't currently have it since i bought the car used.

The gas lid has the premium fuel sticker in black and silver and the boost goes to 15 psi at redline.

Is there any ways to tell?

Thanks!

Check your gas lid sticker as it may say Premium Recomended and that is a stock sticker.

It shoud say Premium [B]Required[/B].

Also the T Map on the intake will be a Bosch with a connector that comes off at a 90 degree angle. The harness will also be spliced in too.

Under the hood the Emissions sticker will also point out the upgrade.

You also should see over 20 PSI and you will see 15 PSI at times when you are not even trying when the stock SS will be maxed out.

Sounds to me like you are stock.

Map sensors had blue labels with the upgrade. There should be a new second emissions label under the hood. But the boost if the giveaway.