transmission problems on 2006 Chevrolet Uplander

my vehicle will not shift into drive, but will shift manually

Asked by for the 2006 Chevrolet Uplander
Sounds like a broken "forward" band in the transmission. Pull off the pan and check for a loose broken piece of metal in the pan, then look up at the slot opening (right side toward the back) in the transmission and check with your finger to see if the band is loose.
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