In December 2024 took my GMC Yukon XL to a mechanic. They replaced the lifter in the driver side of the engine. 2500 miles later it is back in the shop for the same side. Now there is a bent rod. One of the lifter/Rod spots collapsed. The mechanic is in contact with the local GMC dealer to figure out what the next steps are. The recent symptoms had to have car towed back to Fairly reliable Bobs mechanic. Pictures were taken and sent to GMC. First time this happened I heard a Tic in the engine and took it straight to the mechanic. second time this happened. Engine light came on flashing, Trackton light came on, Lost power, there was a shimmy when slowing down and a shake at the stop. I will note the second time this happened below.
2015 GMC Yukon XL: sudden loss of power
5 of the 309 complaints about the 2015 GMC Yukon XL describe sudden loss of power.
- owner complaints
- 5
- of this car's complaints
- 2%
- recalls
- 0
Is there a fix? 328 service bulletins cover this area of the car. See below
Sudden loss of power by model year
What owners say
While driving our GMC Yukon XL, the vehicle will begin shuttering, losing power, slip gears, or unable to shift gears. On one occasion, the vehicle lost was unable to accelerate and maintain speed causing my wife to quickly respond by changing lanes and pulling off on the shoulder of a road, in a very dangerous situation, all while coasting without engine power. Two independent mechanic shops have reported that the torque converted failed and had sent metal fragments throughout the transmission, and ruining the transmission. Both mechanics recommended a new transmission.
Fuel injector is direct injection into cylinder. Excess carbon build-up is endemic with this design causing power loss/decrease, knocking, and potentially increased emissions. Safety factor is loss/decrease of engine power when needed for safe highway driving. This problem is noted in GM literature and technical bulletins. The Malfunction Indicator Light (MIL), also know as the Check Engine Light, illuminated and provided generic malfunction codes via the OBD. Cylinder #7 fuel injector removed and replaced, mechanic inspected the used injector. Heavy carbon build-up noted.
Tl* the contact owns a 2015 gmc yukon xl. While driving and attempting to make a turn at approximately 10 MPH, the vehicle shut off and lost power without warning. The vehicle restarted after approximately 30 minutes and 'please open and close driver's side window' appeared. The dealer and manufacturer were not contacted. The vehicle was not diagnosed or repaired. The failure mileage was approximately 97,000.
When moving in a parking spot the brake pedal became hard as if it lost power brakes, but then returned. A few days later on the freeway traffic stopped in front of us and it happened again. This caused us to need to swerve to avoid causing an accident until we were able to come to a stop. After several miles the power brakes have not returned. There is oil in the vacuum line at the booster and gas mileage ya been poor the past few weeks prior to this. It all points to a faulty vacuum pump. 121,000 miles on the truck.
Service bulletins that may apply
- This service bulletin provides information on replacing the intake manifold when the engine is replaced...
- The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle...
- This service bulletin provides information to dealership personnel for new vehicles with less than 1,000...
- This bulletin advises the technician to flush the cooling system multiple times if oil has been found in...
- This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the...
- This service bulletin provides service information to technicians on guidelines to replace Oil Cooler, Oil...
- This service bulletin advises the technician of possible coolant entering the areas of the engine, either...
- This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil.
Related recalls
No recalls on record for this model year.
Questions about the 2015 GMC Yukon XL loss of power
Is sudden loss of power a common problem on the 2015 GMC Yukon XL?
5 of 309 owner complaints about the 2015 GMC Yukon XL (2%) mention sudden loss of power. The model year with the most reports is 2023.
Is there a recall or service bulletin for this on the 2015 GMC Yukon XL?
There are 0 recalls and 328 service bulletins for the same area of the car. Check them below with your VIN.
Other symptoms on the 2015 GMC Yukon XL
Check engine light 12Engine failure 8Spongy pedal 7Brake failure 6Stalling 6Transmission failure 6Headlights 5
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