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  1. I was excited last April 2023 when my dealer received the 2024 Denali Ultimate 2500 into inventory. My wife and I took it for a test drive and bought the truck that day. Now it's been nearly one year since we bought it and it's done nothing but disappoint. The truck has been at the dealer for repairs for nearly 3 months with every defect related to electrical or software problems and many of these defects haven't been repaired. I'll start off with some of the benign defects, though for what these trucks cost today these defects shouldn't exist: 1. Infotainment system glitches, it will randomly switch between satellite radio and Android audio, the satellite radio loses the signal repeatedly in the suburbs around Chicago (no mountains here). 2. The tailgate Kicker Audio will not disconnect from my phone when the tailgate is closed and the Kicker radio is supposed to be off. The Kicker radio will occasionally play audio when the tailgate is closed. The dealer says to just unpair the Kicker radio from my phone because they can't explain why this is occurring. 3. The wireless charger in the center console is finicky and slow to charge. 4. The now infamous multipro tailgate drop that has caused body damage to the truck's tailgate on 2 occasions and GM still doesn't have a fix to prevent this from happening. The tailgate dropped on us several times as the truck was being driven down the highway and no warning or indication of an open tailgate was ever displayed on the dash. 5. This truck will occasionally suffer the "dead pedal" syndrome; lack of throttle response. Nothing more worrisome than towing a 10,000lbs trailer and having to pull out of a blind driveway on a mountain road and the truck literally will not accelerate. The truck's ECM has yet to record these events. GM's protocol for recording these types of incidences must be very lax. 6. The truck constantly loses communication with the trailer's brakes, resulting in nothing less than loss of trailer brakes. Oh joy, as you're traveling down Vail Pass (7% grade) and your trailer brakes stop working. The dealer blamed a faulty module for this and states they replaced it. Haven't pulled the trailer since this repair so I can't confirm that the defect still exists or not. 7. The traction control on this truck malfunctions occasionally. The traction control will stop working even though it was not manually turned off. As with the dead pedal, the truck's ECM has not recorded these incidences. 8. The truck will consistently die if it is parked for a period of 9 days or less, dependent on the outside temperature. The dealer states that there is nothing wrong and that this truck has to be, at the very least, started everyday and allowed to idle for 20 minutes in order to keep the batteries charged. The dealer has also stated that GM's testing equipment that they must use in order to verify a warranty claim is predisposed to finding no faults. The math for how long a battery should stay charged enough to start this truck is simple; it's an 80 Ah battery and assuming a minimum electrical draw of 50mA to maximum electrical draw of 80mA while the truck is parked the battery should be able to start this truck anywhere from 44 to 67 days. GM corporate has stated to me that they can't validate that my truck has died on multiple occasions, which I find disingenuous, since one of the times it died it sat in the dealership's lot awaiting unrelated repairs and OnStar was notifying me to start the truck in order to recharge the batteries. Apparently GM doesn't find OnStar credible. GMC is refusing to make this right and thinks that having a new truck out of service for nearly 3 months to date is acceptable. Wondering who else may have been experiencing problems with their 2024 Denali Ultimate.
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