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

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

buckwild27

Full Access Member
EMT/First Responder Firefighter
Joined
Feb 7, 2024
Posts
372
Reaction score
702
Location
Ohio
Drove it 1500 miles over the weekend and managed to average 16.5mpg despite the wind. Surprisingly, it got great mileage in the mountains (18+) but once we hit the prairie and we were opened up to the wind it demolished the MPG on the way there AND back. Great vehicle so far aside from the abysmally lackadaisical transmission but @BlackBearPerf emailed my new tune on Friday so that should hopefully be resolved now.

If only they had got to me a day earlier I could have vacationed with the new tune but for some reason the GF thought it was "irresponsible" to flash the ECU in the middle of an out-of-state road trip in the middle of nowhere...
She's gotta sleep some time.
 

Doubeleive

Wes
Supporting Member
Joined
Nov 7, 2017
Posts
30,563
Reaction score
48,043
Location
Stockton, Ca.
Geez this software is a pita....
1000005949.jpg
 
Last edited:

IceIceSilver

TYF Newbie
Joined
Jan 26, 2017
Posts
26
Reaction score
25
Changed the fluid in both diffs and the transfer case. Each magnet had a little fuzz on it, not bad for around 30,000 miles since last change(s).
 

Doubeleive

Wes
Supporting Member
Joined
Nov 7, 2017
Posts
30,563
Reaction score
48,043
Location
Stockton, Ca.
discovered that you can't flash a HMI with techline (sps2) that has built in nav to a vehicle that does not have nav, it just writes the HMI as no nav :mad: :mad: :mad: :mad:
in my case I have on star nav only and ya so it didn't work.....
I guess the best you will get is to unlock the vin (not with sps2) with one that came from a same model vehicle or pay these business's hundreds of dollars that write them with custom files

***In my case you need a VCI number from techline to make it work
 
Last edited:

the 18th letter

Full Access Member
Joined
Feb 14, 2010
Posts
1,091
Reaction score
1,224
Location
Northern New Jersey
Filled up at Sheetz with regular 88. 15% ethanol and 88 octane. 3.09 a gallon I never see E85 or this regular 88 where I’m from. Bucees even had pumps for unleaded with no ethanol.
 
Last edited:

Doubeleive

Wes
Supporting Member
Joined
Nov 7, 2017
Posts
30,563
Reaction score
48,043
Location
Stockton, Ca.
after a little web crawling I guess I need a VCI number from techline, which enables the functionality of the HMI as intended
 

gtrslngrchris

Full Access Member
Joined
Feb 4, 2017
Posts
194
Reaction score
313
I decided to wait until it was 1pm and 101 degrees before I ventured outside to put my new Corsa exhaust on. I decided to be efficient and just sliced the stock exhaust in a couple of places to slide it out and it was the easiest exhaust I've ever removed or installed. The factory spherical clamp bolt snapped on me during disassembly so that added $44 bucks to the cost of the exhaust but luckily AutoZone had it in stock. I recommend removing the heat shield for the spare tire but I definitely wouldn't have gained anything from removing the tire like their instructions state.
20240702_152300.jpg

After the chugging 4 bottles of water I decided to slap on the Hotchkis sway bar set. I left them both on the lighter setting and so far it drives how I imagined. I still really miss my old lowered Tahoe but it is that much closer now.
20240702_184725.jpg

I am happy enough with the Hotchkis sway bars but I think they updated their hardware for cost savings without checking if it would actually work. The hex head bolts provided couldn't physically fit and be turned and the bushing brackets were not deburred well and all 4 required some file work to accept the bolts you can't even use. The instructions provided showed socket cap bolts which would not suffer from that problem and I was able to reuse my old sway bar bolts. As for the exhaust, Corsa 14826, I am pleased but it feels very quiet to me. My old Tahoe was lowered with TSP long tubes and Y pipe and it was aggressive as hell but wonderful and I guess I'm missing that. Perhaps more exhaust components will find their way onto the Denali this summer.
 

Doubeleive

Wes
Supporting Member
Joined
Nov 7, 2017
Posts
30,563
Reaction score
48,043
Location
Stockton, Ca.
Drove it up to Banff, Canada. Checked out Lake Louis. Amazing stuff.

Hit and killed a bird on the way back to Idaho. It’s inside my grille and I’ll have to wait until I get home to Arizona to disassemble some parts to remove the dead bird.
I have hit 3 or 4 over the years, had one in the grill for a while didn't even see it until the wife mentioned it lol
 

ss4chad

Member
Joined
Jan 9, 2024
Posts
95
Reaction score
119
Location
Fort Worth, TX
Changed the Trans Fluid and added the New Mobil 1 Synthetic LV ATF HP fluid along with the Superior Cooler Flow Bypass Kit. I didn't change the filter because the Audi dealer that we bought the Yuke from had did a Trans Flush & Filter 3 months before we bought it, but they didn't know what fluid they put in.
Figured I would wait till next year and do a fluid and filter change then.
Right now I am looking at new wheels and tires!!

Chad
 

15burban

Full Access Member
Joined
Dec 8, 2023
Posts
265
Reaction score
473
Location
Wisconsin
Washed, clay barred, and waxed for the first time. I wanted to do it when we got it last fall and right away this spring, but never could find the time. Of course before I was even done claying it the wife was asking when I'd be done so she could go somewhere. Get done and it starts raining and off she goes with it. At least it looked good for 5 minutes. I hate black vehicles but they do look amazing for those 5 clean minutes.

20240707_145456.jpg
20240707_145542.jpg
20240707_150452.jpg

Even got a picture of the work beater from the reflection off the passenger door.
20240707_145533.jpg
 

gtrslngrchris

Full Access Member
Joined
Feb 4, 2017
Posts
194
Reaction score
313
Those brakes look great. If I wasn't already being lazy about a brake swap on my drift car I would probably be on eBay and rockauto figuring out what to buy for the 6 piston upgrade already.

As for me, I got a deal on a new-to-me radar detector upgrade and "installed" a new mount. I have bought many variations on this mount but I have never felt like any of them were a really complete product but this one is. The o-ring style rubber inlaid into the pivot balls REALLY hold tight and don't slip at all and the aluminum in general has great fit/finish so if you are in the market for one then definitely consider them.
20240711_181923.jpg 20240711_181853.jpg

I don't really feel like I needed the upgrade but I wanted to pass my ****** Max II on to my dad and my Max 360 can trade between drift car and Duramax. I've got to decide how to wire this in. Normally I would just run an RJ11 from the mirror up under the headliner and down the A pillar to the fuse panel but I'm betting most people just tap switched 12v and ground from behind the mirror or the overhead console so I'll have to think about it. I like the plug and play kit from Gen5DIY but it just doesn't seem worth a hundred bucks even if most of that cost is genuine connectors. Any thoughts?
 

Doubeleive

Wes
Supporting Member
Joined
Nov 7, 2017
Posts
30,563
Reaction score
48,043
Location
Stockton, Ca.
Those brakes look great. If I wasn't already being lazy about a brake swap on my drift car I would probably be on eBay and rockauto figuring out what to buy for the 6 piston upgrade already.

As for me, I got a deal on a new-to-me radar detector upgrade and "installed" a new mount. I have bought many variations on this mount but I have never felt like any of them were a really complete product but this one is. The o-ring style rubber inlaid into the pivot balls REALLY hold tight and don't slip at all and the aluminum in general has great fit/finish so if you are in the market for one then definitely consider them.
View attachment 432540 View attachment 432541

I don't really feel like I needed the upgrade but I wanted to pass my ****** Max II on to my dad and my Max 360 can trade between drift car and Duramax. I've got to decide how to wire this in. Normally I would just run an RJ11 from the mirror up under the headliner and down the A pillar to the fuse panel but I'm betting most people just tap switched 12v and ground from behind the mirror or the overhead console so I'll have to think about it. I like the plug and play kit from Gen5DIY but it just doesn't seem worth a hundred bucks even if most of that cost is genuine connectors. Any thoughts?
on my 18 silverado the mirror power was only 10v and my valentine will not operate at 10v so I tapped into the airbag light, the light only has power with key on so win/win
 

WingsAA

CMFIC
Joined
May 28, 2009
Posts
457
Reaction score
60
Location
Dallas, TX
Those brakes look great. If I wasn't already being lazy about a brake swap on my drift car I would probably be on eBay and rockauto figuring out what to buy for the 6 piston upgrade already.

As for me, I got a deal on a new-to-me radar detector upgrade and "installed" a new mount. I have bought many variations on this mount but I have never felt like any of them were a really complete product but this one is. The o-ring style rubber inlaid into the pivot balls REALLY hold tight and don't slip at all and the aluminum in general has great fit/finish so if you are in the market for one then definitely consider them.
View attachment 432540 View attachment 432541

I don't really feel like I needed the upgrade but I wanted to pass my ****** Max II on to my dad and my Max 360 can trade between drift car and Duramax. I've got to decide how to wire this in. Normally I would just run an RJ11 from the mirror up under the headliner and down the A pillar to the fuse panel but I'm betting most people just tap switched 12v and ground from behind the mirror or the overhead console so I'll have to think about it. I like the plug and play kit from Gen5DIY but it just doesn't seem worth a hundred bucks even if most of that cost is genuine connectors. Any thoughts?
I've always used BlendMounts with success and the mirror-tap connectors. For the Yukon, I stayed with BlendMount but didn't like the mirror-tap for this application as they didn't work well with the tight connectors. I did use the GenVDIY adapter and it's pricey, but in my mind, the best option for this application. It was just a much cleaner and secure install.
 

k_arnold72

Full Access Member
Joined
Jun 2, 2023
Posts
201
Reaction score
241
I threw these TSP long tubes and catted y pipe on over the weekend. Surprisingly civilized sounding with an oem muffler(which was harvested from a silverado). No good pics because my hands were dirty the whole time. As soon as I trace and address the tail pipe hitting the frame under throttle, I'll make a video.
 

Attachments

  • 20240711_173712.jpg
    20240711_173712.jpg
    409.4 KB · Views: 30
  • 20240703_161038.jpg
    20240703_161038.jpg
    333.5 KB · Views: 26

Forum statistics

Threads
137,781
Posts
1,992,153
Members
102,777
Latest member
wwiizz
Back
Top