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What 147 owners told NHTSA about the 2017 GMC Yukon Denali Xl 1500

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (147)Crash / fire / injury (8)Lights (41)Transmission & drivetrain (35)Electrical system (32)Engine (25)Brakes (23)Fuel system (5)Airbags (4)Seats (4)Speed control (4)Suspension (4)

4 of 147 complaints match · Seats · clear filters

Jun 26, 2026Seats

There has been 3 different incidents. First incident I was going 45mph merging into 5 lanes of traffic when the back of my driver seat randomly layed down flat and stayed there. I had to get off an exit, get out pull up on front of seat and then it layed back up. 2nd incident I was going about 40mph it folded completely forward and pinned me against the steeling wheel. I had to stop immediately in the middle of the road put my 4 ways on and wiggle and slide out of the car started pulling up on front of seat and was finally able to put it back in place. The 3rd time I was going 20 mph it folded completely forward and pinned against. Had to stop in the middle Of the road again pull up on front of seat. The lumbar setting randomly comes and goes while driving down the road. Took it the garage to be looked at. They weren’t able to figure out why it’s doing what it’s doing but the only option they had was to unplug the module for safety reasons

NHTSA ODI 11746793

Oct 3, 2022AirbagsSeatsCrash1 injury

The drivers seat broke and front airbags did not deploy. The seat broke during rear end collision which pushed the seat back so I was no longer able to reach steering wheel or brakes to stop. Went thru on coming traffic to end up on wrong side of road in ditch. Police inspection, insurance inspections, auto repair inspection No warnings.

NHTSA ODI 11487688

Jan 27, 2021SuspensionSeatsEngine

MY VEHICLE TRANSMISSION WENT OUT MOTOR MOUNDS WENT OUT AND SEAT STOPPED WORKING AT CONDENSOR WENT OUT. AND A FEW OTHER THINGS. SUV IS A 2017 WE HAVE ALREADY SPENT OVER 11,000 IN 2 YEARS FIXING IT NOW THE AC IS 2400 TO GET FIXED.

NHTSA ODI 11390222

Aug 25, 2019SteeringSeatsBrakes

MY BRAKES GET HARD WHEN DRIVING IN SLOW TRAFFIC. AND STERRING WHEEL GETS STIFF WHEN PRESSED DURING TURNING CORNERS OR TURNS

NHTSA ODI 11246264

Working with the data? Download all 147 complaints as CSV · fetched from NHTSA July 25, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2017 GMC Yukon Denali Xl 1500 verdict →