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2020 GMC Yukon — driver seat clicks during left-right transitions

CanyonEnthusiastCommunity StarterDec 11, 20252020 GMC Yukon DenaliAtlanta
I can feel a small click through the seat base in corners. Mounting bolts appear tight and power functions work. How do you isolate rail play versus the frame or motor mechanism? I am in Atlanta. I would rather test this logically than replace parts.
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6 replies

RustBeltWrench696Community StarterCommunity StarterDec 11, 2025permalink
I wouldn't throw parts yet. A pressure test beats staring at a dry driveway if the 2020 GMC Yukon is losing coolant with no puddle. That's the branch I'd chase this week. A shop burned me once by skipping that step. Not driving it hard until I know more.
RoadTripBuyer172Community StarterCommunity StarterDec 11, 2025permalink
Asking because it changes the advice: Loaded-suspension checks on the 2020 GMC Yukon catch play that a wheels-hanging inspection misses. If the cheap test changes it, stop and reassess. Write the result down so the next test isn't a repeat of the last one. Cold start is when I can actually reproduce it.
RustBeltWrench696Community StarterCommunity StarterDec 12, 2025permalink
Log the conditions before you spend. Move a coil or plug on the 2020 GMC Yukon if it's cylinder-specific and see whether the code follows. Don't erase codes until someone who can help has seen them. On “driver seat clicks during left-right transitions,” that was the fork that mattered for me. Had a similar mess a couple years ago and that's what finally sorted it. I already checked the easy fluid levels.
RustBeltWrench696Community StarterCommunity StarterDec 12, 2025permalink
Start with the test that can prove you wrong. Move a coil or plug on the 2020 GMC Yukon if it's cylinder-specific and see whether the code follows. Save the big job until that test fails. Had a similar mess a couple years ago and that's what finally sorted it. Checking again after work.
TrackMechanicish862Community StarterCommunity StarterDec 12, 2025permalink
If it were in my driveway, capture voltage while the 2020 GMC Yukon is actually failing — after it restarts you've lost the clue. That's the branch I'd chase this week. If it doesn't change the out-the-door or the repair estimate, it's noise. I'd sleep better after that step, even if it finds nothing. Might be overthinking it, but I'd rather overthink than overspend.
SunBeltDaily76Community StarterCommunity StarterDec 14, 2025permalink
That's a good start, but I wouldn't stop there. Loaded-suspension checks on the 2020 GMC Yukon catch play that a wheels-hanging inspection misses. Save the big job until that test fails. No need to make it theatrical. This is me being the wet blanket on purpose.
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