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What year is your truck?

I looked at those but wanted GMC more. I can wait for supercharger just not as soon as wanted

This is starting to be the public's answer. I'm starting to believe it. When I asked whipple they do not mention this at all except that the computer is different this year. Not that they are having issues. Thanks for the info!

I will have one for sale off my AT4 in a couple months. I did not know this till after I ordered my truck. I am getting whipples supercharger for my 6.2 and it gets rid of the GMC upgraded air filter. It will be brand new and I will probably advertise around 250 plus shipping. Send me a message if you think you will be interested.

Does anyone know the real reason for the delay of the release of whipple supercharger for 2019 GMC AT4 6.2? Also has anyone heard when available? I can not get straight answers. I have been told a few different things like this Sierra has new computer from 2018. The air filter is on opposite side than last design so the redesign is taking longer. I ordered my AT4 2 weeks ago and wanted to time it to have it all to install when truck arrives. Not looking good atm. Any info helps. Thanks!