so i used to have an open 3.08 rear end, i recently swapped them out with LSD and 3.42s, and i know a few people at the local chevy dealership and they said they can get my pcm reprogrammed no problem. day after i got gears installed i went to the dealership and they had all kinds of trouble trying to do it. i brought them a vin number i found off this site to use, but they said they didnt need it they could use mine and all they have to do is call someone from GM and they would give them the correct codes to reprogam it for gears and bigger tires (275 17s.. i know theres no difference hardly from stock tires but they wanted to reprogram it for these too). so they call this guy and he wasnt there and so they told me to come back in about two hours, i come back and they tell me that the guy said that those gears are too big for my car and the tires are too big as well. so all that sucks, anyone know how to do this so i can tell them?
what all do gears effect? i know it will make speedo fast, will it also throw off shift points? i went to the track tonight and it was f*cking pathetic the times i got... it feels like it is shifting way early and when i cruise beside people in my club with 3.42s i shift a lot sooner then they do. i hope that i can get it reprogrammed and it will fix it because i am terribly unhappy with times compared to 3.08s
what all do gears effect? i know it will make speedo fast, will it also throw off shift points? i went to the track tonight and it was f*cking pathetic the times i got... it feels like it is shifting way early and when i cruise beside people in my club with 3.42s i shift a lot sooner then they do. i hope that i can get it reprogrammed and it will fix it because i am terribly unhappy with times compared to 3.08s
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