The 2027 Ultimate is my #2 choice,as long as they will offer the painted wheelwell flairs. #1 is the Yukon Ultimate. The new gas engines don't matter to me. I'll go diesel either way.
I'll be buying another 3.0l when I replace my 2025 Sierra. I had an issue (engine siezed) but it was replaced and has been fine ever since. I'm spoiled with the excellent fuel economy to swap to a 6 2l or its replacement.
I see that the existing powertrains are being carried over on the Yukon... I find that odd.
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I initially was looking for a "now" buy but there are none within 250 miles with the equipment I want and the 2027's SOP is around the 2nd week of Sept. Couple of months and I move up a model year. The dumb things are priced about like an Escalade but no diesel or towing packages. I want the Yukon to have the trailer camera wiring. I have the GM trailer camera already installed on my trailer.
There are plenty being sold. I had a 6.2l 2023 that I sold prior to the actual recall. I would have kept it had the recall come out before I bought the 3.0l 2025. I'm ordering a 2027 Yukon next month with another 3.0l diesel. I'm thrilled with the fuel economy of the diesel.
Go to your local dealer service department and talk to the service manager and get his take. If I was sold on a gasser, I'd lean towards the 6 2l rather than being a first year owner of the 6.6l.
The tailgate of pickups is not designed to be water tight. There are seal kits for them but I doubt they work effectively. But, I've not tried them. I always have hard folding tonneau covers and the BakFlip brand has been my favorite. And, for the most part, the bed stays dry. I would invest in some bins that can be closed to better protect sensitive stuff.
I wouldn't do any DIY sealing. I'm thinking they need to "breathe" and need venting to allow them to dry. I've never looked into them but I'd leave it as designed.
I'm good with the auto climate control in both the 2023 and the 2025. Both keep me comfortable at 73°year around. My wife keeps the passenger side at 72°. We rarely adjust the temps.
My 3.0l engine failed at 5,403 miles. It just stopped running while accelerating away from a roundabout. No warning, no dash lights. Just quit and I coasted to a stop. I had steering. A message popped up on the screen that read "please restart engine" or something like that. It wouldn't and it was towed to the dealership. They determined it siezed. GM didn't pay for them to tear it down, just immediately approved a new engine. I doubt I'll ever find out what failed. It took 50 days to get the truck back. I have 300 miles on the truck since and it's running just fine. Fingers crossed it was a fluke.
So, I traded my 2023 6.2l before the recall came out for an identical truck except for the engine. The new one has a 3.0l. The 6.2l was trouble free but there was enough issues popping up we decided to swap it out a year early. Fast forward. My 3.0l engine siezed 3 weeks ago and it sits in the dealer service lot waiting for a replacement engine. Just my luck. But, even if it went into a lemon law buyback, I'd get another 3.0l. I don't plan on dumping this one once fixed.
My loaner had that happen (no sound from anything) last week. "Fixed" itself an hour after shutting it off and then restarting. A 2026 Sierra 1500. Hasn't happened since.
So my 3.0l lasted exactly 5,403 miles. Engine siezed. Waiting for a replacement. No warning. Just a "ding" from the dash with "please restart engine" or something like that.