What did you do to your 2015-2020 K2XX Tahoe/Yukon Today?

[Walkerfever]

I believe I finished up the 6L80E tune yesterday. After watching Silversurfer's videos for hours, I finally have a pretty good understanding of what controls what. Torque management is iffy, but I'm getting there. He says we should be able to have a cup of coffee on the dash and not spill a drop for shifting. I believe him. This thing shifts very nicely now. I might change the shift points, but not the shift characteristics.

Even after the new battery I still had issues flashing tunes. It'd give me a boot loader error. I set up a thread on HPT forums, set up a ticket with HPT (forum told me to), and a post in the HPT group on FB. They wanted me to send in all kinds of info (understandably), but a random dude on the FB group said to try resyncing the interface. I did, it had a firmware update and that fixed the issue. Now it flashes faster than it ever has, by a lot. I can flash the ECM in 20 seconds and the TCM in 40. I'm happy. I'm wondering if I even needed the new battery to begin with...

 

[the 18th letter]

Took a trip into NYC and got caught in good old NYC traffic for a good bit. My thermostat read 210 and I saw transmission temps of 190-195. I do most of my driving on the highway and run cooler than 210 and transmission temps this time of year are usually about 150-160. Soon as broke free of the gridlock and the stop and go all went back to what I normally see. Is it just mine or do these things like to run free?

 

[Marky Dissod]

Took a trip into NYC and got caught in good old NYC traffic for a good bit. My thermostat read 210F, and I saw ATF temps of 190F-195F.
I do most of my driving on the highway and run cooler than 210F and ATF temps this time of year are usually about 150-160F.
Soon as broke free of the gridlock and the stop and go all went back to what I normally see.

Is it just mine, or do these things like to run free?

Not just yours, it's how GM wants them to run.
In the city, in an attempt to eke out as much MpG as possible, programs vehicles with electrical fans to delay their activation,
keeping the motor oil and ATF warmer, reducing friction.

On the highway the newer trucks & suvs actually have active grilles that can choose to block some or most of the airflow that cools yours on the highway.

 

[Jeff_]

Got this pop up today.
Think something needs to be reset, or did it just go bad finally and I’ll need to replace the TPMS?

 

[Doubeleive]

Got this pop up today.
Think something needs to be reset, or did it just go bad finally and I’ll need to replace the TPMS?

normal cause is dead tpms battery

 

[Sparksalot]

Got this pop up today.
Think something needs to be reset, or did it just go bad finally and I’ll need to replace the TPMS?

I have one on each truck that randomly does this for a half hour or maybe a day. Then does fine for a month.

 

[Walkerfever]

Has anyone had a high pitched whistling sound, but only when moving? It seems to come and go so I have trouble diagnosing it. The tone doesn't change based on speed, RPM, wheel speed, etc. As soon as I start rolling the high pitched noise starts. I figured I'd ask here before I start sticking my head into parts of the Yukon I probably should be sticking my head into.

 

[Sparksalot]

I avoided new hood ornaments for thethirdtwin. The school got attacked though.

 

[Sparksalot]

Well it wasn’t MY K2, but it was a K2. Mine was there however.

I met up with my dad for turkey Day. He’s been having some issues that point to a stuck engine thermostat. He brought one along, and we swapped it out. The most time spent was getting the stupid intake tube out of the way. The tstat itself took a couple of minutes.

 

[the 18th letter]

Tested my remote starter today and it works in the 2+ years I’ve had it I’ve never had the need or desire to use it. I’ll probobly never use it again but my lady now knows I have remote starter and can imagine her “needing” it now that she knows about it. If she gets too comfortable I’ll just start using her car more.