LB7: Alison list of codes just got the truck 01 2500hd chevy - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
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Allison OEM Discuss repairing & maintaining an OEM Allison automatic transmission.

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Old 12-20-2019, 12:57 AM   #1 (permalink)
Northerngmtech
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Alison list of codes just got the truck 01 2500hd chevy

Alright i got the truck knowing there was problems with the transmission if anyone might be able to help me pinpoint the cause. Hoping its electrical.
Im a tech for a chevy dealership but not experienced in transmission. I will be using gm service info for diag on the codes i have.
List of codes are p0748 p0841 p0845 p0846 p1710 p1711 p1713 p1724 p1720 p1721
Cleared the codes and shift threw all gears fine for one pass then once the light comes back on sometimes wont engage, lucky to get it to shift
if it does also a couple time the shift indicator flashed like a bad bdsm switch
would cause, only was able to get pass that by shutting it of and back on

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2001 2500hd chevy LB7

Last edited by OkDually; 12-20-2019 at 08:28 AM. Reason: prefix/sig
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