Useless Information

[swathdiver]

Couple of days ago my daugter comes home and tells me the check engine light is on. Checking the DTCs P0521 00 and P0523 00 come up, the gauge is reading zero. Use the Tech2 to sweep the cluster gauges, all is well there. Check the oil pressure on Tech-2 and it is reading -129 psi. Time for a new sensor.

2 different part numbers come up all across the internet. 12673134 and 55488247. I pop the hood to see if I can tell the which one it is but no, can't even get my hand back there in my present condition. So both are ordered.

I enlisted the aid of my daughter's boyfriend and we, meaning he, took the intake off and we swapped out the sensor, 12673134. No screen underneath this L9H motor. Cleaned everything up, including the throttle body and replaced the pretty clean WIX filter for an ACDelco high capacity and put her back together again. Took a moment for the oil pressure to register and then used our phone app to clear the codes. All is well.


Test drive was great. She roasts the tires with ease. Gotta love these 6.2s!

 

[gooffeyguy]

Couple of days ago my daugter comes home and tells me the check engine light is on. Checking the DTCs P0521 00 and P0523 00 come up, the gauge is reading zero. Use the Tech2 to sweep the cluster gauges, all is well there. Check the oil pressure on Tech-2 and it is reading -129 psi. Time for a new sensor.

2 different part numbers come up all across the internet. 12673134 and 55488247. I pop the hood to see if I can tell the which one it is but no, can't even get my hand back there in my present condition. So both are ordered.

I enlisted the aid of my daughter's boyfriend and we, meaning he, took the intake off and we swapped out the sensor, 12673134. No screen underneath this L9H motor. Cleaned everything up, including the throttle body and replaced the pretty clean WIX filter for an ACDelco high capacity and put her back together again. Took a moment for the oil pressure to register and then used our phone app to clear the codes. All is well.


Test drive was great. She roasts the tires with ease. Gotta love these 6.2s!

What was the difference between the two part numbers, the top shape of the electrical connection?

 

[swathdiver]

What was the difference between the two part numbers, the top shape of the electrical connection?

Yes, the connector for ours is round, the other is rectangular and both are 3-pin.

 

[swathdiver]

Adios Muchachos!

 

[Big Mama]

Nice!!

 

[Geotrash]

Adios Muchachos!
View attachment 393104

Damn! They probably have at least FOUR Honda BF250's on the back of that one!

Have fun!

 

[swathdiver]

Damn! They probably have at least FOUR Honda BF250's on the back of that one!

Have fun!

She has six 12-cylinder Wartsilas!

 

[swathdiver]

Not much has been done to the Yukon between the last big project and now.

I bought new Stabilus struts for the back glass. Soon as I took one off the glass fell and the shock crashed into my temple and head. That was fun.

We replaced the driver's side exhaust gasket, manifold bolts, nuts and the o-ring seal. Now the car starts up smooth and is not cranky anymore. We did not find the old o-ring seal between the Y-pipe and exhaust manifold, guess the last guy left it out.

We finally took down the transmission pan and replaced the filter and pickup tube seal.

When I say "we" I really mean my daughter Julia and her boyfriend who is an ASE certified mechanic and lover of all things Cummins diesels.

Transmission fluid at 183,999 miles was dark red after 3 years and 30,461 miles and 1,016 engine hours. Transmission OLM was at 82%.

And as promised, here are photos of the filter:



Very clean with some shiny flakes of metal (presumably aluminum) in the filter. The magnet was full of course, no chunks or large flakes of metal. We forgot to take a photo before cleaning it. We replaced the transmission oil pan gasket with a new one. The original stuck to the pan and got misshaped during removal.

Put about 25 miles on it since including a WOT from stop and she runs like a top.

 

[swathdiver]

Oh, about a week ago, my other future son-in-law backed into my truck:



Grrrr!!!

Pretty sure a PDR guy can fix the fender and then the bumper will fit back into place. Unfortunately, the paint on the cover cracked and will have to be painted. Suggestions or comments appreciated!

 

[Sam Harris]

Oh, about a week ago, my other future son-in-law backed into my truck:

View attachment 394869View attachment 394870

Grrrr!!!

Pretty sure a PDR guy can fix the fender and then the bumper will fit back into place. Unfortunately, the paint on the cover cracked and will have to be painted. Suggestions or comments appreciated!

Your former future son-in-law?

 

[swathdiver]

The truck has been burning E85 since November. So at 100% Highway driving with speeds over 48 mph she's averaged 14.1 MPG.

In mixed City/Highway driving, between 40%-60% or so she's averaged 12.5 MPG.

At 100% City driving with speeds below 20 mph she's averaged 9.8 MPG.

Not shown has been the cost per mile for every tank of E85 since November and she's averaged twenty-four cents a mile with a high of .29 cents and a low of .17 cents a mile.

 

[Sam Harris]

Man, I miss my corn gas..

 

[Big Mama]

I’ve seen some videos where mobile paint guys can take care of the cracked paint areas

 

[donjetman]

View attachment 394871

The truck has been burning E85 since November. So at 100% Highway driving with speeds over 48 mph she's averaged 14.1 MPG.

In mixed City/Highway driving, between 40%-60% or so she's averaged 12.5 MPG.

At 100% City driving with speeds below 20 mph she's averaged 9.8 MPG.

Not shown has been the cost per mile for every tank of E85 since November and she's averaged twenty-four cents a mile with a high of .29 cents and a low of .17 cents a mile.

2007 Yukon Denali w/6.2L L92 w/186k miles

In 2022
our cost/mile = 20 cents/mile,
burning 100% premium unleaded,
@ $3.50/gal,
driving 50%hwy.50%local
averaged 17.4mpg,
and 2.7 gal/hr

so far in 2023:
our cost/mile = 19 cents/mile
burning 100% premium unleaded
@ 3.50/gal
driving 35%hwy/65%local
I'm averaging 50+ mph
averaging 18.4 mpg
and 2.7 gal/hr

Local driving for us still includes a fair amount of hwy driving since we live on the outskirts of a large city and avoid city driving like the plague.

 

[swathdiver]

2007 Yukon Denali w/6.2L L92 w/186k miles

In 2022
our cost/mile = 20 cents/mile,
burning 100% premium unleaded,
@ $3.50/gal,
driving 50%hwy.50%local
averaged 17.4mpg,
and 2.7 gal/hr

so far in 2023:
our cost/mile = 19 cents/mile
burning 100% premium unleaded
@ 3.50/gal
driving 35%hwy/65%local
I'm averaging 50+ mph
averaging 18.4 mpg
and 2.7 gal/hr

Local driving for us still includes a fair amount of hwy driving since we live on the outskirts of a large city and avoid city driving like the plague.

I was still averaging $4.55 a gallon back then for Chevron's 93.

Those 6.2s are more efficient as long as they stay out of the city. Our 2013 6.2 Sierra gets better mileage than my 2009 5.3.

Let's see, to compare to yours, between 40% and 60% city driving she averaged a burn of 2.2 GPH and 15.7 MPGs. Your burn rate is about what our 2013 does.

Quite impressive Don!

 

[swathdiver]

Went outside to get the mail and noticed that the hood on the passenger side up near the cowl was raised. The adjuster up front is still tight but there is movement or play when the hood is down.

Maybe we left a tool under the hood and shut it the other night?

I wonder if a bracket up there needs some persuading with a mallet?

What do you guys do?

 

[donjetman]

Quite impressive Don!

Thanks
I like all the data you collect. I know the 6.2 sucks a lot of petroleum idling or city driving.

I've become somewhat obsessive about getting the best gas mileage I can in the Denali without going under the speed limit. If I go thru a drive-thru I shut the engine off instead of idling.

When I need to go somewhere I think to myself "is the distance long enough and are there enough hwy miles to get good mpg?" If not I take my 07 Toyota FJ Cruiser. Nothing I can do can make it get less than 20 mpg.

I did not use to think that way. It's not about the $$. It's just a fun challenge & interesting to me.

We love the way the Denali handles the open hwy.

I bought/added a 02 C5 Corvette to our fleet and plan to drive it back and fourth between TX & CO instead of the Denali in the warmer months. It gets 26+ mpg.

 

[Marky Dissod]

I bought/added a '02 C5 Corvette to our fleet and plan to drive it back and fourth between TX & CO instead of the Denali in the warmer months. It gets 26+ mpg.

Safe to assume that 26MpG, is withOUT Lean Cruise enabled?

 

[swathdiver]

Thanks
I like all the data you collect. I know the 6.2 sucks a lot of petroleum idling or city driving.

I've become somewhat obsessive about getting the best gas mileage I can in the Denali without going under the speed limit. If I go thru a drive-thru I shut the engine off instead of idling.

When I need to go somewhere I think to myself "is the distance long enough and are there enough hwy miles to get good mpg?" If not I take my 07 Toyota FJ Cruiser. Nothing I can do can make it get less than 20 mpg.

I did not use to think that way. It's not about the $$. It's just a fun challenge & interesting to me.

We love the way the Denali handles the open hwy.

I bought/added a 02 C5 Corvette to our fleet and plan to drive it back and fourth between TX & CO instead of the Denali in the warmer months. It gets 26+ mpg.

I'm with you, it's fun and a sign of the engine being in top form.

I'll always take the highway or longer route to avoid stop and go driving, not just for fuel economy but for safety as well.

So you got the Vette! Cool. But now you can't haul the kitchen sink back and forth and the view won't be what it was but those winding road sure will be a lot more fun to drive over!

 

[Tonyrodz]

I’ve seen some videos where mobile paint guys can take care of the cracked paint areas

I used to do mobile paint. Definitely can be repaired. Just make sure you get a reputable guy.