general problems of the 2018 GMC Yukon

The back hatch would not open while the car was on and in park. Upon reaching in without being in the car, we turned it off, and it engaged reverse on its own, causing it to reverse immediately almost causing terminal harm to myself and my family. It careened into the woods with us unable to stop it due to the immediate speed. No one was in the vehicle, it was solely self propelled. We have a video of the path it took and the damage it caused. When the car wrecked, even when turned off, the lights and windshields wipers engaged by themselves.

All back light won’t turn on only brake lights but not night time running lights.

2018 Yukon denali engine failed June 2024 due to the lifter being bent. The dealership richey Cadillac in daytona beach estimated the repairs at $18,862 and were going to have my vehicle for months. I took it to my mechanic who rebuilt the engine for $7181 in 30 days. My safety was placed at risk because while driving I had to pull over since I had no control with the engine failure. There were no messages prior to the failure.

The air-conditioning (a/c) unit in my 2018 GMC Yukon xl (my vehicle) is not blowing as cold as usual. The dealership (westpoint GMC) where I purchased my vehicle says their a/c department is backed-up and that I would need to leave my vehicle with them for 2 to 3 days to run diagnostics. I took my vehicle to another general motors dealership instead, westside chevy, and their a/c department or technicians state that my vehicle has a leak in the rear evaporator coil after running their leak detection tests. I purchased my vehicle new on may 4, 2018, and have not any mechanical issues nor heating, ventilating, air-conditioning (hvac) issues since ownership. This mechanical flaw / malfunction / disruption in the cooling comfort of my vehicle during this extremely hot weather puts the life of other drivers and myself at risk of injury or fatality due to discomfort and inconvenience while driving. There are no alerts or alarms associated with the failure of this mechanical component within the hvac of my vehicle. This condition first appeared on September 30, 2023. I understand that a possibly similar or related investigation in other gm vehicles took effect in February 2016 under technical bulletin 16-na-046. Is it probable that there is a design flaw within the 2017-2019 GMC Yukon, Yukon xl and other similar builds hvac?.

Sunroof exploded while I was driving. Had I not had the shade closed I could have been injured by shattered glass. Glass has been replaced at the dealer of purchase, via insurance claim with my agent. There was no indication that this would occur.

Gm already has extended the warrant for faulty ac condensers model years 2015-2017. This model 2018 experiences the same exact condenser leak as the 2015-2017 models. In fact special coverage adjustment 17336 which omits the 2018 model has the same failure. This warranty should be extended into 2018 as well.

Air conditioning intermittently working, but mostly not at all right to be a leak involved. Still need it fixed to know more.

1. Torque converter and currently at the GMC dealership right now. 2. Failed to acceralate and runs backwards on hills if you brake at a light; stuttering between first and second gear. Hesitate to stop at lights, jerks very hard after delayed take off after braking at light. 3. Confirmed by the GMC dealership 4. Others, inspected by GMC dealership 5. None, no engine light or never seen on inspection equipment.

Despite wheelers fixing the vehicle’s recall, it still pulls one way and never improved.

It’s starting to warm up now that winter is behind us, so when we recently drove our 2018 Yukon xl, we turned on the air conditioning. Unfortunately, only warm air came out of the vents. We made an appointment and took the Yukon to the GMC dealer. We paid over $160 for their diagnostic fee (complete rip off), and they were immediately able to see that there was a leak in the ac condenser. The dealer service representative said that this has been happening quite frequently on 2014 and newer models and that they are all leaking in the same place, a weld on the driver’s side of the condenser. Our Yukon has $59,000 miles…this is way to young for a condenser replacement. Dealer is quoting us over $1200 for the repair. GMC continues to build these cars without known defects and passes on the costs to the customer! by the way, there is special coverage adjustment 17336 that extends warranty coverage for this specific problem on Gmcs, but only for 2015-2017 models.

Keeps showing a service trailer brake system, it does it once in a while but when it does it keeps showing the message after pressing dismiss, I was researching online and apparently there is a lot of people dealing with this same issue and looks like it is a defect from factory.

2018 GMC Yukon condenser cracked and leaked refrigerant to the environment. 17336 air conditioning condenser (combi-cooler) refrigerant leak covers up to 2017 models. My 2018 Yukon produced in December of 2017 and experience same issue. $1800 repair at dealership.

Ac condenser failed structurally and leaked all refrigerant from the system requiring a condenser replacement and recharge.

Brand new Yukon xl 2018 5250 mills, the ac takes a long time to cool down at least 15 to 20 minutes. I am in miami,FL and with 95 fahrenhait and 3 kids in the car. GMC after 6 weeks of trying to fix the problem just let me know that the ac is working as design and there is nothing to do. In this 6 weeks I got a Yukon as a loaner and the ac was working perfect, the ac took 3 min to cool down every time you turn it on.

When running from time to time, the service stabilitrak message appears and the abs light momentarily appears and disappears, and the agent was detected, but the defect was not discovered, and in the detection of my friend's device, code c0800 appeared, but the agent refused to look for the defect in the code when I explained it to them, and I still wait when it will come back and worry.