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2003 Chevy Silverado 1500 5.3 Vortec I install Bully Dog chip truck. Startes making my truck act all weird but I uninstalled it. I reset the EMC back to factory ...

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Help!

Postby Tmedley82 [OP] » Feb 22 2021, 9:48pm

2003 Chevy Silverado 1500 5.3 Vortec I install Bully Dog chip truck. Startes making my truck act all weird but I uninstalled it. I reset the EMC back to factory settings. Now when I start driving its lagging on the transmission from 1st to 2and. I tried to reset to TCM and that didn't work. Any ideas as to what this chip did to my transmission and how to fix it?
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Re: Help!

Postby Walkers » Feb 23 2021, 12:34am

How many miles on the transmission? You might just disconnect the battery for a while, then let the truck relearn everything. It takes a little while, so have patience.
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Re: Help!

Postby Tmedley82 [OP] » Feb 23 2021, 1:35am

I already did the battery disconnect last night for over 2 hours. 185k on the transmission. It's not slipping. The truck ran perfect before the chip. Once the chip was installed it was doing this between 2and and 3rd gears, now that I removed it 2nd and 3rd are back to normal and its lagging in 1st
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Re: Help!

Postby GBSierraSLE » Feb 23 2021, 1:43am

It can take 150 miles for the ECM and TCM to relearn the new parameters.
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Re: Help!

Postby 06MonteSS » Feb 25 2021, 10:41pm

when's the last time the tranny fluid and filter were changed??? old/dirty fluid and filter will cause shifting issues...
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