I had a 2018 Equinox AWD and currently own a 2021 GMC Terrain AWD and they both make that same humming noise when the temp gets below freezing. I had the Equinox to the dealer many times and the issue was never resolved. They even replaced the transfer case under warranty. When disengaging the...
I had a 2018 Equinox AWD that did the same thing in cold weather. Put it in AWD and the problem was gone. Had it to the dealer a number of times for this issue and was never resolved. Now driving a 2021 GMC Terrain AWD purchased new and does the same thing when temp dives below freezing. I just...
My 2021 Terrain makes a whirring noise when I have the air conditioning on. It may be the electric fan for the radiator you're hearing. Drive with the ac off and see if it still does it.
I had a 2018 Equinox awd and the drive train was extremely loud when the weather was down in the teens or colder. I had it to the dealer too many times to count. Changed the oil in the transfer case, replaced a cv axle, even replaced the transfer case as a last resort all under warranty. I even...
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