Thread: P0503 p0502
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Old 07-12-2017, 07:19 PM   #1
c10 custom
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Join Date: Aug 2011
Location: Lethbridge Montana
Posts: 259
P0503 p0502

Hi i am having some trouble diagnosing these codes but the vehicle speed sensors are okay? its a 2001 chev truck 4x4 6.0 litre
tested the speed sensors they are okay even tried a new sensor still didnt work
speedometer bouncing around and transmission not shifting properly
any help would be greatly appreciated thank you
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