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28/10/2021 4:14 pm
Topic starter
I have a fairly new (8500mi) 2020 GMC 3500 cutaway utility truck that will hesitate and lug uphill after slowing down in traffic on acceleration in second or third gear. No Power! it almost feels like the transmission is not shifting like you were driving a manual transmission. It also feels like it's starving for fuel.
This problem really gets bad when the temperature is in the eighty's or above and the AC is running, ambient temperature that is.
Took it to the dealer and they said it is doing all the things I said it was but they had no fix and GMC was working on it.
Help Jack {black}:sulky:
Massachusetts
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28/10/2021 5:05 pm
Good luck.
