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

[Doubeleive]

dropped it off at the dealer this morning they just called and stated they also suspect it being the injector and will check again in the AM while cold.
presuming that is verified it's just a matter of getting it done under the special coverage 10 years/150k

 

[NYBRD]

Time to throw these suckers on

 

[Doubeleive]

well guess what? it was the injector and the dealer is replacing all of them, no charge whew

 

[CMoore711]

Great news @Doubeleive . Between this and the other items the extended warranty you bought has covered I think it's fair to say that it's paid for itself and then some! Gotta love when a roll of the dice purchase on a "just in case" extended warranty pays off!

 

[Doubeleive]

Great news @Doubeleive . Between this and the other items the extended warranty you bought has covered I think it's fair to say that it's paid for itself and then some! Gotta love when a roll of the dice purchase on a "just in case" extended warranty pays off!

we didn't buy any extra warranty for this 2016. It came with a 1 year 10k warranty but it did happen to have a 10yr/150k special coverage from GM on the injectors and vacuum pump.
the sales lady tried to get us to buy the longer warranty but I figured if it doesn't tank in the 1st year then it will be ok.
if it had not been covered for the injectors I would have just paid for the diagnostic and then ordered a set of injectors from herko and did it myself.
I did buy a warranty for the Silverado and it is still good until October of this year, it has paid me back on the leaks that were fixed and oil cooler lines

 

[jaxscuby]

stainless steel braided brake lines for all corners..so much fun..

 

[justchecking]

Heading out for a 6-7000 road trip. Up to Red Lake Ontario then down to Texas and then Florida and back home. Towing a camper for half of the trip and lots of side trips in between. 48,000 miles on the odometer now and all the fluids are fresh. Next Friday at this time I will be fishing with buddys in Canada.

 

[tuckerrnr1]

Safe travels and enjoy the trip.

 

[Fless]

Heading out for a 6-7000 road trip. Up to Red Lake Ontario then down to Texas and then Florida and back home. Towing a camper for half of the trip and lots of side trips in between. 48,000 miles on the odometer now and all the fluids are fresh. Next Friday at this time I will be fishing with buddys in Canada.

View attachment 457334

Safe travels, and enjoy! Dad and I went up to Lake of the Woods several times when I was in high school. The people who ran the resort on the small island were based in Kenora. Even as a teenager I enjoyed the time with a parent. LOL

 

[Geotrash]

Pulled the camper home from a fantastic weekend out in Crozet, VA. My wife and I and our daughter’s volleyball coach (also a fellow camper) had 6 teenage girls in tow on this trip, so there were plenty of laughs and a little drama.

Managed around 8.5 mpg in the Suburban 3500, pulling 7,500 lbs. I’ll take it.

 

[Doubeleive]

Pulled the camper home from a fantastic weekend out in Crozet, VA. My wife and I and our daughter’s volleyball coach (also a fellow camper) had 6 teenage girls in tow on this trip, so there were plenty of laughs and a little drama.

Managed around 8.5 mpg in the Suburban 3500, pulling 7,500 lbs. I’ll take it.


View attachment 457501

what's the axle ratio on that thing?

 

[Marky Dissod]

what's the axle ratio on that 3500?

Bet it's either 3.73 or 4.10 ...

 

[Geotrash]

what's the axle ratio on that thing?

4.10. It’s most comfortable in 5th, and can hold it up most mild-moderate grades, so I hold it there to keep it from hunting when we’re driving over the piedmont areas of the blue ridge. Lots of up/down on I-64 west of Richmond.

 

[Marky Dissod]

Pulled the camper home from a fantastic weekend out in Crozet, VA ...
Managed around 8.5 mpg in the Suburban 3500, pulling 7,500 lbs. I’ll take it.

6L90, then.

 

[Geotrash]

6L90?

Yessir.

 

[Marky Dissod]

4.10. It’s most comfortable in 5th, and can hold it up most mild-moderate grades,
so I hold it there to keep it from hunting when we’re driving over the piedmont areas of the blue ridge.
Lots of up/down on I-64 west of Richmond.

Although I'm willing to bet that you'll disagree,
I take this quote as evidence that your Tow / Haul mode should be recalibrated
"to keep it from hunting when we’re driving over the piedmont areas of the blue ridge."
By YOU holding it there manually, you're engaging the overrun clutches.
Using overrun clutches lowers MpGs AND adds some heat
(not that it can't handle that heat easily!).
If the 'nature' of the program held it in 5th FOR YOU,
the overrun clutches involvement would be avoided.

However, I'm aware that there are certain situations where you'd still prefer to use Manual-5.

 

[Geotrash]

Although I'm willing to bet that you'll disagree,
I take this quote as evidence that your Tow / Haul mode should be recalibrated
"to keep it from hunting when we’re driving over the piedmont areas of the blue ridge."
By YOU holding it there manually, you're engaging the overrun clutches.
Using overrun clutches lowers MpGs AND adds some heat
(not that it can't handle that heat easily!).
If the 'nature' of the program held it in 5th FOR YOU,
the overrun clutches involvement would be avoided.

However, I'm aware that there are certain situations where you'd still prefer to use Manual-5.

Ah! That's helpful to know. Do you know of any place I can learn more about these overrun clutches in the 6L90? I'm learning new things every day!

 

[Marky Dissod]

Ah! That's helpful to know.

Although there will always be unusually anomalous use cases -

I once tuned an LT1-&-4L60E transplant into an early 70s FireBird convertible,
and made the teachable mistake of telling my customer to use 'Performance Mode'
for driving up&down the San Fran hills where Steve McQueen drove his own stunts for Bullitt
(he wound up using both modes depending on how he was driving in those hills) -

Generally, THE MOST VALUABLE thing to tune is ALWAYS the transmission's shift tables.
The point of tuning the shift tables is to make manual shifting as rare as reasonably possible.
'Reasonably possible' should NORMALLY mean 'NEVER', except for very unusual circumstances,
which I'd concede would likely apply for 2500 & 3500 vehicles.

Do you know of any place I can learn more about these overrun clutches in the 6L90?
I'm learning new things every day!

Although by now it damn well ought to be available in .pdf, I'd guess that
there should be some Field Service Manual equivalent for the 6L80 / 6L90 specifically.

 

[Doubeleive]

I just think that with 4.10 gears you should be good to go unless you are going up a steep upgrade a best of 10.2 seems pretty low
if it is the "thinking" of (saving the transmission) then pull it and have it built for towing by a reputable shop.
there are critical upgrades to the 6l80 that should be done, cheaper to do it while young
but...that's just my thinking and I don't know diddly about many things.

 

[Geotrash]

Although there will always be unusually anomalous use cases -

I once tuned an LT1-&-4L60E transplant into an early 70s FireBird convertible,
and made the teachable mistake of telling my customer to use 'Performance Mode'
for driving up&down the San Fran hills where Steve McQueen drove his own stunts for Bullitt
(he wound up using both modes depending on how he was driving in those hills) -

Generally, THE MOST VALUABLE thing to tune is ALWAYS the transmission's shift tables.
The point of tuning the shift tables is to make manual shifting as rare as reasonably possible.
'Reasonably possible' should NORMALLY mean 'NEVER', except for very unusual circumstances,
which I'd concede would likely apply for 2500 & 3500 vehicles.

Although by now it damn well ought to be available in .pdf, I'd guess that
there should be some Field Service Manual equivalent for the 6L80 / 6L90 specifically.

Blackbear has tuned this one for me already, and I asked them to tune it for towing. It doesn't hunt, really. It's just that when the topography looks more like a sine way in profile than a pancake, it translates to downshifting every other mile as it has to keep speed on the climbs. If I run in 5th, it rarely ever needs to shift. I've read over the years that this is perfectly acceptable practice, until now.