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  1. Chevy Silverado Forum (GMC Sierra)
    I have a 2005 Silverado 2500hd, recently I had a PO756 code come up, so I replaced the B solenoid which I assumed was causing all my troubles and the code to throw. After I replaced it and the filter/fluid I’m still having the same issues…. Won’t shift in D will shift up/down in manual once or...
    4l80 4l80e po756 transmission
  2. Chevy Silverado Forum (GMC Sierra)
    I drive a 2005 Silverado 2500hd with 176k miles on it, recently I towed a decently heavy livestock trailer about 500miles round trip. I did not exceed 65mph the whole time and the trans only got hot once,about 250°, when I noticed I slowed way down until it dropped down to 200°. This morning my...
    4l60-e 4l60e po756 po757 transmission
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