GM Auto Transmission TuneKagan Tuning Domestic Tuning package Includes 100% dialed in Transmission Calibration Files This is a tune for all GM transmissions Faster Shift points Rpm shift points raised Smoother shifting when driving normally Responsive shifting when Wide Open Throttle ** T87a (2017+ vehicles) controllers need to be sent to Hptuners to be unlocked first to allow tuning. Warranty & Refunds This is a digital file. Therefore, there can be no refunds or warranty
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