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Originally Posted by Sewie
Actually, that depends. The PCM can only be programmed up to 33" tires (at least by the dealership). If he already has 33's, there isn't much point in getting a custom tune just for the tires. If he has 32" tires, he can have it programmed by the dealership up to 33".
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You are correct. I didn't do a good job of sharing my experience related to the question. I went from 32" to 33" and did have to have my computer reprogrammed due to the bigger tire. If he already has 33" he should be ok. I will stand by my belief that 65 psi is way too much, though.