What did you do to your NBS GMT800 Tahoe/Yukon Today?

[jarydM]

definitely not a big deal, but (ignoring the failing lights in the cluster) I'm managing to get some pretty good numbers for gas mileage. It's not all highways where I am, but it's certainly not "city" driving, although I'm an 8-5-er so I'm always in the stop and go mess when on the road.

I originally took this to send to my dad, who owns an 01 Tahoe, because he likes mine so much better, lol!

 

[TheAutumnWind]

View attachment 75581
definitely not a big deal, but (ignoring the failing lights in the cluster) I'm managing to get some pretty good numbers for gas mileage. It's not all highways where I am, but it's certainly not "city" driving, although I'm an 8-5-er so I'm always in the stop and go mess when on the road.

I originally took this to send to my dad, who owns an 01 Tahoe, because he likes mine so much better, lol!

Whoa. What mods?

 

[jarydM]

Whoa. What mods?

Really, not enough even to brag about.... but my MPG went WAAY up earlier this year when I was afraid I got some dirty gas, so I ran Lucas, Seafoam, and CevronTechron through every tank (*edit* not at the same time, I rotated them) for about 500 miles, and drove it like a scalded dog..... before I got smart, and changed my upstream o2 sensor, lol.

K&N Filter in stock airbox
Iridium ACDelco Spark
Magnecor Performance (8.5mm) wires
18" OEM Wheel (2015+) with Goodyear Wranglers
Bilstein 5100's


This tank is a bit less, I'm only averaging about 16.2. I also have the rear seat in (leave it in during the winter incase it snows). My dad says i get good gas mileage because I don't drive it hard, but I know how to make that thing get up, and I know exactly what it sounds like at 5800rpms, lol

 

[jarydM]

Really, not enough even to brag about.... but my MPG went WAAY up earlier this year when I was afraid I got some dirty gas, so I ran Lucas, Seafoam, and CevronTechron through every tank for about 500 miles, and drove it like a scalded dog..... before I got smart, and changed my upstream o2 sensor, lol.

K&N Filter in stock airbox
Iridium ACDelco Spark
Magnecor Performance (8.5mm) wires
18" OEM Wheel (2015+) with Goodyear Wranglers
Bilstein 5100's


This tank is a bit less, I'm only averaging about 16.2. I also have the rear seat in (leave it in during the winter incase it snows). My dad says i get good gas mileage because I don't drive it hard, but I know how to make that thing get up, and I know exactly what it sounds like at 5800rpms, lol

oh, and not a MOD per-se, but I run Mobil1 0w30 and this last time I bought the AcDelco filter thats oversize for our application. Seems to have gave me about 0.8mpg

 

[Rocket Man]

Today I ordered 50 lb/ hour fuel injectors to replace my stock 25 lb/ hour injectors 'cause I'm gonna need them for the Whipple I'm ordering tomorrow. Also while the intake is off, ordered knock sensors and harness, valley cover gasket, and oil pressure sending unit.

 

[TheAutumnWind]

oh, and not a MOD per-se, but I run Mobil1 0w30 and this last time I bought the AcDelco filter thats oversize for our application. Seems to have gave me about 0.8mpg

Nothing crazy then. I ran synthetics and had an air filter, fresh plugs, no rack for awhile and was slightly lowered on 17's and averaged 12 mpg. Then again I had a 6.0 and AWD and was dragging around the XL body so more weight and drag.

 

[jarydM]

Nothing crazy then. I ran synthetics and had an air filter, fresh plugs, no rack for awhile and was slightly lowered on 17's and averaged 12 mpg. Then again I had a 6.0 and AWD and was dragging around the XL body so more weight and drag.

Honestly, I'm not sure why my mileage is as good as it is. My dad's tahoe is 4 years older with an efan mod, mostly the same everything else (both 5.3) mines a z71 and his is an LT, and on the same roads he gets 12-13

So, I dunno. Good luck I guess.

 

[dhulsey779]

test fitted the 22's I recently picked up, rubs just a little bit on full steering lock to lock. Hopefully can get them powder coating in the next couple weeks.


Sent from my iPhone using Tapatalk

 

[Rocket Man]

I never trust the DIC, it's usually off. Mine says I get way better mileage than I actually do. I do the old fashioned calculation, fill-up to fill-up with a calculator. It's never that good lol but I drive it hard.

 

[jarydM]

I never trust the DIC, it's usually off. Mine says I get way better mileage than I actually do. I do the old fashioned calculation, fill-up to fill-up with a calculator. It's never that good lol but I drive it hard.

Yeah, it has a tendency to be off a bit sometimes, but I did double check on that last go around.. I put right at 21 gallons in it, and had went 340mi

 

[mals]

Honestly, I'm not sure why my mileage is as good as it is. My dad's tahoe is 4 years older with an efan mod, mostly the same everything else (both 5.3) mines a z71 and his is an LT, and on the same roads he gets 12-13

So, I dunno. Good luck I guess.

Not to rain on your parade, but have you manually calculated your MPG with miles on the odometer vs. gallons at the pump to full? The only reason I ask is because the gallons used counter on my DIC does not match the amount of fuel it takes to refill the tank. The DIC is using that number to calculate the MPG on the display. My true MPG is always lower then the tank MPG on the DIC.

I'd be happy, but surprised, to be wrong.

 

[jarydM]

Not to rain on your parade, but have you manually calculated your MPG with miles on the odometer vs. gallons at the pump to full? The only reason I ask is because the gallons used counter on my DIC does not match the amount of fuel it takes to refill the tank. The DIC is using that number to calculate the MPG on the display. My true MPG is always lower then the tank MPG on the DIC.

I'd be happy, but surprised, to be wrong.

Yeah, it's usually a little off, but not by much. But it was by the calculator 16.92mpg at last fill

 

[Fosscore]

I use both DIC and bean counter method and it neither way approaches 12mpg in the city.

Every time I fill up I say to myself I won't stomp on it this tank to see if I can make that mpg number a bit higher.

I do enjoy the sound of my truck perhaps a little too much sometimes, so that reality of higher mpg's never seems to materialize.

 

[jarydM]

I use both DIC and bean counter method and it neither way approaches 12mpg in the city.

Every time I fill up I say to myself I won't stomp on it this tank to see if I can make that mpg number a bit higher.

I do enjoy the sound of my truck perhaps a little too much sometimes, so that reality of higher mpg's never seems to materialize.

Yeah, I'm gonna enjoy it now, because once the intake, headers, and corsa go on, I doubt I'll see 15+ anymore, lol

 

[Rocket Man]

Did I mention I'm ordering a supercharger tomorrow? Looks like my mpg is about to take another hit!

 

[MadDogDelpho]

It's not about miles per gallon, it's about smiles per gallon

 

[jarydM]

Did I mention I'm ordering a supercharger tomorrow? Looks like my mpg is about to take another hit!

I wish I had the budget for it! I'm gonna eventually get around to rebuilding the top end, and replacing gaskets and such.

 

[Tonyrodz]

Yeah, I'm gonna enjoy it now, because once the intake, headers, and corsa go on, I doubt I'll see 15+ anymore, lol

Mpgs should be better due to better breathing. But you can't romp on it, like we all do! Lol

 

[05Single]

test fitted the 22's I recently picked up, rubs just a little bit on full steering lock to lock. Hopefully can get them powder coating in the next couple weeks.


Sent from my iPhone using Tapatalk

Color pc? White! Silver!

 

[W8TVI]

I installed new OE style fogs on my Yukon XL:

Now I just have to make up my mind if I want to see better in the fog, or have them match the switchbacks...