I'm Really liking the MPG of my 2016 Denali

[DennisT]

I bought my Denali in July of last year and I've got a little over 16,000 miles on it now. I've made 4 round trips to FL in it at about 1,000 miles each way. It has averaged between 20.9 and 21.4 mpg on each trip and I drive around 78 to 82 mph. Around town I'm getting around 16 mpg. That really beats my '09 6.2L Tahoe which only got around 12.5 mpg in town and the best it could do on FL trips was 17.5.

Is this similar to what others are seeing with their big SUV's?

 

[YukonCpt]

I averaged 23mpg in my 17 Denali on the 9.5 hour drive home from the dealer. I was impressed.

 

[Miami-Dade]

I averaged 23mpg in my 17 Denali on the 9.5 hour drive home from the dealer. I was impressed.

That is what I get when I go from Miami-NYC area..Around town 16mpg.

That is with 2WD and A/C constantly on.

 

[CHRIS CALCIANO]

I bought my Denali in July of last year and I've got a little over 16,000 miles on it now. I've made 4 round trips to FL in it at about 1,000 miles each way. It has averaged between 20.9 and 21.4 mpg on each trip and I drive around 78 to 82 mph. Around town I'm getting around 16 mpg. That really beats my '09 6.2L Tahoe which only got around 12.5 mpg in town and the best it could do on FL trips was 17.5.

Is this similar to what others are seeing with their big SUV's?

I LIVE IN THE PHILLY AREA, MY COMBINED MPG IS 14.5 SINCE I GOT THE DENALI 10K MILES AGO. I ADMIT I HAVE A HEAVY FOOT SO IM PLEASED WITH IT

 

[mck024]

That is what I get when I go from Miami-NYC area..Around town 16mpg.

Same here 16/23

 

[BrianT]

Best I got on the highway was 24 mpg, I average around 20 combined.

 

[Burby]

XL? 2WD or 4WD?

 

[AZRiverRunner]

That's about what I get in my Tahoe 4x4, I'm usually driving between SoCal and AZ, so there's a lot of up and down grades and fast.

 

[BMPNUGLS]

I make a 250 mile drive to a plant I service weekly since I bought my 2016 Denali XL 4WD...below was from this morning and is pretty consistent for the trip running no A/C, etc and averaging 79-80mph.

 

[MadDogDelpho]

Dang this makes the NBS look like garbage. I average about 12 mpg

 

[TheAutumnWind]

Dang this makes the NBS look like garbage. I average about 12 mpg

Most full size suv's from that era get around the same. More gears and cylinder deactivation can help a lot.

 

[Miami-Dade]

Dang this makes the NBS look like garbage. I average about 12 mpg

At least you do not have to worry about AFM issues.

 

[TheAutumnWind]

At least you do not have to worry about AFM issues.

True story. I would delete AFM if I had it.

 

[BMPNUGLS]

A note - my mileage shot is WITH my Range AFM Disabler installed as well!

 

[TheAutumnWind]

A note - my mileage shot is WITH my Range AFM Disabler installed as well!

Oh wow that is awesome. It's great to see those rigs getting respectable mileage without the AFM. Other than that is your vehicle completely stock?

 

[cardude2000]

A note - my mileage shot is WITH my Range AFM Disabler installed as well!

My range device was throwing check engine codes up so I returned it. Do you have the same issue?


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[IamZ]

Ok I must be doing something wrong. I drove to Hilton Head this past weekend from Atlanta. Roundtrip my average was 19.4.

 

[thebishman]

16K miles on the 2016 SWB Denali. Average of 18.1 mpg from when driven off the lot.
Bish

 

[BMPNUGLS]

Oh wow that is awesome. It's great to see those rigs getting respectable mileage without the AFM. Other than that is your vehicle completely stock?

I did the exhaust flapper screw mod to hold the internal baffle open all the time and put Bestline Oil Additive in after each oil change - 1/2 quart (that stuff WORKS!!). Otherwise completely stock.

 

[BMPNUGLS]

My range device was throwing check engine codes up so I returned it. Do you have the same issue?


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I've had my Range disabler for almost 3 years now (had it in my previous 15 Suburban first) and I bought my dad one for his new 2016 Denali Super Crew truck....both of us get a engine code once every 6 weeks to 2 months. In the Range literature they say it can throw a engine code once in a while due to all the 'checks' the system does upon startup each time...but they also explain a 'hot shot' procedure to clear the error code. You remove the Range device when the vehicle is still off. Start the vehicle and let it idle for like a minute to 'normalize' all the checks the GMC system does upon startup...then plug the AFM device in while the vehicle is running... the AFM is programmed to send a signal to the vehicle system when it is 'hot shot' installed (plugged in while the vehicle is already running. I've done this a few times and works like a charm! Clears the check engine light within a few seconds!!