most people that do custom tunes have a whole mess of extra PCMs sitting around, so just have them send you one with a tune so you'll have your stock unit when you go in for service
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Eve ('00 FRC): hot-air intake
Rowan ('09 H3): 5spd mom-mobile
Penny ('99 Sierra): 5.3 / HD 5spd... gone but not forgotten
Samson ('18 HD): compounded 408
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