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nikkeshelton

Shift problems (2009 serria 1500 SL)

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Still having shift problems, 33,000 miles. Does not want to shift out of 1st. gear sometimes! I disconnected my Edge Programer and still have the same problem so know that is not the problem. Had a gear-vendor 2spd. box installed but would not think that would be the problem but it is electrically hooked up...? I think I have a shift solenoid going out but not sure. last time I took it to the dealer it of course would not do it for them! and they see no codes. Put a deep trans pan on so fluid is new. Frustrating to have a newer truck do this! Also noticed that when trans does not want to shift the speedo is not working, speedo kicks in when tranny engauges so wonder about computer issues. These new vehicles with computers are great until something goes wrong! I know that Gear-vendors had to get with GM about how to wire up their box so (unlike my wife) I don't think that is the issue, any ideas?
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