Odometer Fraud. The contact owns a 2018 GMC Yukon. It was discovered that there was a mileage discrepancy. The vehicle was a dealer sale. At the time of purchase, the vehicle mileage was 72,499. After three months, the vehicle experienced an engine failure, and a worker at a third-party automotive parts distributor and recycling center discovered that the original engine's mileage was 160,000.
The worst 2018 GMC Yukon problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Engine28
- Transmission18
- Suspension8
- Brakes5
- Electrical4
- Steering4
- Acceleration3
- Airbags3
- Visibility3
- Body2
- Driver assistance2
- Fuel system2
- Lights2
- Wheels2
- Tires1
Specific symptoms reported on the 2018 GMC Yukon
Recalls 3
Service brakes, hydraulic: power assist: vacuum
- What is wrong
- General Motors LLC (GM) is recalling certain 2018 Cadillac Escalade, Chevrolet Silverado 1500 and Tahoe, GMC Sierra 1500 and Yukon vehicles equipped with either a 5.3L or 6.2L V8 engine. The output of the mechanical vacuum pump can decrease over time, decreasing the amount of vacuum/power brake assist.
- Risk
- A decrease in brake assist can increase the brake pedal effort and distance required to stop the vehicle, increasing the risk of a crash.
- Remedy
- GM will notify owners, and dealers will reprogram the Electronic Brake Control Module, free of charge. The recall began November 11, 2020. Owners may contact GM customer service at 1‑866‑522‑9559, Cadillac customer service at 1‑800‑458‑8006 or Chevrolet customer service at 1‑800‑630‑2438. GM's number for this recall is N202300860.
Recall number 20V603000 · Recall details
Service brakes
- What is wrong
- General Motors LLC (GM) is recalling certain 2015-2020 Chevrolet Suburban, Tahoe, and GMC Yukon, and 2014-2018 Chevrolet Silverado 1500 and GMC Sierra 1500 vehicles equipped with a 5.3-liter engine, a 3.08-ratio rear axle and four-wheel drive. If a wheel-speed sensor fails, while the vehicle is traveling between 41 and 60 mph in four-wheel or automatic mode, the Electronic-Brake Control Module (EBCM) software may activate the driveline-protection system.
- Risk
- Unintended activation of the driveline-protection system will cause unintended braking on the wheel on the opposite side of the failed sensor, causing the vehicle to pull to one side unexpectedly, increasing the risk of a crash.
- Remedy
- GM will notify owners, and dealers will reprogram the EBCM, free of charge. The recall began December 11, 2019. Owners may contact Chevrolet customer service at 1‑800‑630‑2438 or GMC customer service at 1‑800‑462‑8782. GM's number for this recall is N192261050.
Recall number 19V761000 · Recall details
Service brakes, hydraulic: power assist: vacuum
- What is wrong
- General Motors LLC (GM) is recalling certain 2015-2017 Cadillac Escalade, 2014-2018 Chevrolet Silverado, GMC Sierra, 2015-2018 Chevrolet Suburban, Tahoe, GMC Yukon vehicles. The amount of vacuum created by the vacuum pump may decrease over time.
- Risk
- As the vacuum level drops, the brake assist decreases, increasing braking effort, extending the distance required to stop the vehicle, thereby increasing the risk of a crash.
- Remedy
- GM will notify owners, and dealers will reprogram the Electronic Brake Control Module, free of charge. The recall began October 8, 2019. Owners may contact Chevrolet customer service at 1‑800‑630‑2438, Cadillac customer service at 1‑800‑458‑8006 or GMC customer service at 1‑800‑462‑8782. GM's number for this recall is N192268490.
Recall number 19V645000 · Recall details
Technical service bulletins for the 2018 GMC Yukon 1,116
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- This service bulletin provides information about GM Accessories
- This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
- Unknown or other
- This PI provides diagnostic tips for diagnosing electric trailer brakes issues.
- PI to help diagnose A/C concern
- Unknown or other
- Unknown or other
- Unknown or other
- This PI Communications information on an alternative product dealers can use to perform 19-NA-255: Wax...
- Unknown or other
2018 GMC Yukon fuel economy
Official EPA estimates in miles per gallon (MPGe for electric). Ranges cover trims that share the same engine.
| Engine | Drive | City | Highway | Combined |
|---|---|---|---|---|
| 5.3L 8‑cyl | RWD | 16 | 23 | 19 |
| 5.3L 8‑cyl | 4WD | 15-16 | 22 | 18 |
| 6.2L 8‑cyl | RWD | 14 | 23 | 17 |
| 6.2L 8‑cyl | 4WD | 14 | 21-22 | 16-17 |
What 2018 GMC Yukon owners say
Most recent owner complaints, unedited.
I started my vehicle and as I accelerated I started to hear a knocking noise. The vehicle and engine have been inspected by the dealership. The problem has also been confirmed by the dealership.There were no warning lights or messages before the knocking noise started.
The 2018 Yukon has been at the dealership several timeswaiting for a valve body for the transmission. There are valve body recalls for other year GM vehicles with the same transmission, but not for the 2018 model even though it appears to be the same part number. I don’t understand how this 2018 model apart of the recalls when it’s got the same issues as the newer ones. This is the second Yukon I’ve bought in the last seven years and the other one had the exact same issue.
The contact owns a 2018 GMC Yukon. The contact stated that the vehicle was taken to a local dealer for service, and the contact was informed that the radiator was leaking and needed to be replaced. The contact stated that there were no signs of a leak prior to taking the vehicle for service. The contact was advised by the dealer that it was a common failure for the year and model vehicle. The manufacturer was contacted and offered a buyback. The vehicle was not repaired. The failure mileage was 128,640.
I purchased my used GMC YUKON from a used car dealership 3/28/26. I signed the papers for the agreement while I was driving the vechicle home I lost power and it wouldn't go forward with gas applied. The check engine light came on, I pulled the suv over and it was towed. The code that popped up 0700 and 02723 both codes having to do with the transmission.
Please see attached letter
The 2018 Yukon Denali has been at the dealership for 7 weeks waiting for a valve body for the transmission. There are valve body recalls for other year GM vehicles with the same transmission, but not for the 2018 model even though it appears to be the same part number. The transmission was already replaced on this vehicle at 500 miles.
As of [XXX] , I witnessed a squealing sound coming from the rear end of my 2018 Denali Yukon XL truck. And it's affecting my braking. And it jerked when I changed my gears on my truck . And there are lights on in my dashboard on my truck. The engine light was blinking on and off and the traction control light was blinking on and off also. But the back driver side of the truck was squealing also. Please help me to resolve this situation. In the name of Jesus. Thanks again [XXX] and [XXX] . INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
The contact owns a 2018 GMC Yukon. The contact stated after the vehicle was serviced, while driving 30 MPH and depressing accelerator pedal, the vehicle failed to respond. The contact stated that the vehicle hesitated, and the contact shifted to a lower gear to drive to the residence safely. A dealer was contacted. The vehicle was towed to the dealer where it was diagnosed and determined that the transmission needed to be replaced, and that the engine block was damaged. The transmission and engine block were replaced, and the vehicle was repaired. The manufacturer was not made aware of the failure. The failure mileage was 104,000.
Air conditioner condenser faulty and had to repaired. Premium Ride Shocks faulty and had to be repaired. Lifters and bent pushrod faulty and had to be repaired. Vehicle currently has approximately 70,000 miles. These are all known issues by GM and very expensive to fix and no recalls.
Compare the 2018 GMC Yukon
Yukon vs Chevrolet TahoeYukon vs Ford ExpeditionYukon vs Chevrolet SuburbanYukon vs Toyota SequoiaYukon vs Nissan Armada
Other model years
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Questions about the 2018 GMC Yukon
Is the 2018 GMC Yukon reliable?
Owners have filed 70 complaints about the 2018 GMC Yukon, fewer than a typical Yukon model year.
What is the 2018 GMC Yukon year score?
The 2018 GMC Yukon scores 86 out of 100 (good). The score compares it with the other model years of the GMC Yukon: 75 is a typical year, 50 means twice the usual complaints, and serious complaints and recalls lower it.
What is the most common problem with the 2018 GMC Yukon?
Engine and cooling, with 28 complaints. Next is transmission (18).
How many recalls does the 2018 GMC Yukon have?
3 recalls, covering service brakes, hydraulic and service brakes.
What year does the GMC Yukon have bad engine?
The GMC Yukon model years with the most engine complaints are 2021 (220 complaints), 2023 (173 complaints) and 2022 (124 complaints).
What gas mileage does the 2018 GMC Yukon get?
Official estimates for the 2018 GMC Yukon range from 16 to 19 mpg combined. The most efficient version (5.3L 8-cyl, RWD) gets 16 city and 23 highway.
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