What's the best year 2015-2020

What year will give you the least amount of problems if you want to put a lot of miles on.
I'm thinking up grading from a trusty 2006 Yukon xl. Ya just looking. Any advise would be great .

The later the year in most generations usually gives GM time to figure things out. Reports show many problems, TSB’s and some recalls with the 2015. DOD/AFM has been a problem almost since it’s inception. Be sure to listen for the tick tick tick of lifter problems on any rig you find.
If gadgets aren’t important you can probably find a GMT 900 with low miles. You might also come across a K2XX that’s had the lifters replaced, the trx case repaired and the A.C. condenser replaced.
Of course all of this is based on hearing about problems versus hearing nothing from rigs with no problems, which is certainly the majority of owners.

Personally i would go with the later years… 18,19,20….like. @Big Mama said… most problems were ‘worked’ out by then… most.

As stated above, your best bet is to go with the later model years within the same generation of truck. That said, my 07, the first model year of the GMT900 generation has been almost flawless, since I purchased it (used).

2019-2020 pre-chip shortage/pre-pandemic
avoid the 8 speed, from what I have seen some of the little gizmo's/buttons/switchs go out prematurely but that stuff is not hard to fix but can add extra cost
suspension parts fail earlier on this gen, metal is thinner, paint is thinner, increased road noise (at least on the lower trims) probably due to the thinner metal and no sound insulation
door seals are better but that doesn't stop the road noise. Overall there are more buttons, lights and functions so hence more stuff to fail.
the engine's make more noise's you will hear what seems like strange stuff, def more ticks and clicks like a grandfather clock
there more "alive" on this gen, you will see and hear strange stuff when you simply open the door. Ever want to see the mileage? simply open the door and it pops right up on the cluster.
they have electric steering, vacuum pump, push to start (depending on trim level)-not a fan myself of push to start
starting with the 8 speed no transmission dipstick, but it can be retrofitted.
different operating system (GDS2) and behavior so if you DIY a lot you will want to invest in a decent scanner figure $500 for one that can do what you need
luckily you can still program modules with techline and sps, requires a windows 10 pc/laptop $45 per vin for 2 years access
a good low mileage one is going to still be in the high 20's or even 30's which is overpriced
I window shop from time to time, gotta pay off the wife's 16 before I can seriously start looking.

If you like creature comforts, shoot for a 16+ as the Apple CarPlay comes into play. Otherwise it’s still just a GM truck. They have issues but are generally pretty robust. They have to be otherwise they would be such consistent sellers for GM. Good luck in your search! I had a 01 2500 and now an 18 3500 burb and it’s good to be back with one. Not sure I can rationalize the price new, but love them used!

Bigburb3500 said:

If you like creature comforts, shoot for a 16+ as the Apple CarPlay comes into play. Otherwise it’s still just a GM truck. They have issues but are generally pretty robust. They have to be otherwise they would be such consistent sellers for GM. Good luck in your search! I had a 01 2500 and now an 18 3500 burb and it’s good to be back with one. Not sure I can rationalize the price new, but love them used!

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I have a 2019 suburban Z71 owned since new. It's been trouble free.

Hobert said:

I have a 2019 suburban Z71 owned since new. It's been trouble free.

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If it’s the red one in your profile pic I love the color. That red is one of the best colors on the road. Full stop.

2020 Yukon slt, 6 speed, no issues so far. Everything works as designed. I pull a 6000 lb boat, no issues. I do all maintenance, easy to do. My old 07 was great but like this one better.

Also, just to throw this out there, consider investing into your 06. For far less than the cost of a newer model you could refresh you engine, suspension, new paint, update your interior, etc... Unless, of course, there are major rust issues or something making it less worth the effort.