Wont shift up out of first gear!
Hey, any advice on this would be very appreciated. We’ve been dealing with issue after issue in the last month. Lastest thing is it won’t shift up, just stays in first. Yesterday we got a new spark plug and then it worked for the rest of the day, went to head out of town this morning and the problem was back. We just dropped the transmission pan and replaced the 1-2shift solenoid. Didn’t fix it so we’re feeling a bit defeated.
We’re trying to take the fuse box out to clean it since it’s been oily and making things go haywire. Hard to believe it could be that since a brand new fuse went in yesterday but so far that’s the only thing that’s seems to have made a difference.
Anyway, she’s a 2006 Chevy Duramax 3500 diesel
Ideas??
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