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Hey all,
I recently purchased a used 2021 GMC 3500 HD. Of course, Murphy's law, my check engine light came on today after a month of owning it. I scanned it with my HP scanner, and I get this...

Hey all,
I have an MPVI2 tuner I?ve used on my Tundra with a lot of success. I recently purchased a BMW X7 and I have a sensor error in one of the 3rd row seats. I?ve since cleaned the sensor,...

Thanks for all the info @SlowNStock! I'm a software engineer, and I'm pretty tech savvy. However equating the inputs on the drive train to the corresponding settings tables, and then creating the...

Thanks @SlowNStock! I tuned with your changes, and it helped, but I still experienced an issue where the truck seems to up-shift too soon. The truck would accelerate, and I'd get past 3,500 RPMs,...

Hi All,
I have a 2016 Toyota Tundra. I've modified the following settings from the default tune supplied by HP Tune.

1) Tire Size changed for my 295/70/R18 tires
2) Removed 1st gear 4lo...

Piling on late to this thread. I'm also experiencing this issue with my 2016 Toyota Tundra. I changed my tire size. My cruise will engage, but when it has to downshift, it will never rev past...

I missed that detail when I was setting up the initial tune. That solved my issue, thank you!

Here's my HPT file. Thanks for helping out! 110262

I'm attempting to follow the video description here to eliminate artificial throttle limiting in 4-Lo since I'm out quite a bit in the CO mountains in 4 Lo.
...

Hi @SlowNStock

Thanks for posting this sheet



I'm a software engineer, and I've done firmware programming before, but I'm new to tuning my vehicle. I want to use your attached sheet to...