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Old 08-22-2012, 08:30 PM   #1 (permalink)
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The impossible: 04 Yukon XL Denali AWD

So we recently got some great dane puppies and we needed a new car.

Replaced my 99 dakota with the Yukon XL.

Love the car and it even gets OK mileage considering the size and the 6.0L motor.

I work from home and my "daily" driver is a Miata so i dont really care about city mileage at all.

What are the best mods to be done to this rolling brick that are cost/effort efficient?

What should i focus on first for the best gains when going 80 down the highway?

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Old 08-22-2012, 08:57 PM   #2 (permalink)
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The Q Sold - '02 Infiniti Q45 Sport
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What should i focus on first for the best gains when going 80 down the highway?

welcome.

hummmm.......let's see...........oh I know!!!!!!!








slow down.
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MetroMPG: "Get the MPG gauge - it turns driving into a fuel & money saving game."

ECO MODS PERFORMED:
First: ScangaugeII
http://ecomodder.com/forum/showthrea...eii-23306.html

Second: Grille Block
http://ecomodder.com/forum/showthrea...e-10912-2.html

Third: Full underbelly pan
http://ecomodder.com/forum/showthrea...q45-11402.html

Fourth: rear skirts and 30.4mpg on trip!
http://ecomodder.com/forum/showthrea...tml#post247938
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Old 08-22-2012, 08:57 PM   #3 (permalink)
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Join Date: Oct 2008
Location: Lawrence, KS
Posts: 1,032

Saturn-sold - '99 saturn sc1
Team Saturn
90 day: 28.28 mpg (US)

Yukon - '03 GMC Yukon Denali
90 day: 14.4 mpg (US)
Thanks: 42
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might look at the differences on the xfe trucks and hybrid utilities to see how many of their differences you can replicate.
does your truck have electric fans or use a clutch? i think all the 1500s got electric fans in '05, but didnt know if the denali might have got it early
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Old 08-22-2012, 10:40 PM   #4 (permalink)
GRU
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silver bullet - '00 Honda Civic
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hmmm that's a hard vehicle to improve mpg...it's heavy so avoid stoping...try to drive at a steady 45mph or so
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Old 08-22-2012, 10:44 PM   #5 (permalink)
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Location: Texas
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The Q Sold - '02 Infiniti Q45 Sport
90 day: 23.08 mpg (US)

blackie - '14 nissan altima sv
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or......

plan your life better and quit leaving late.
That way you don't have to speed.


unless your a p/t first responder in a small community........
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MetroMPG: "Get the MPG gauge - it turns driving into a fuel & money saving game."

ECO MODS PERFORMED:
First: ScangaugeII
http://ecomodder.com/forum/showthrea...eii-23306.html

Second: Grille Block
http://ecomodder.com/forum/showthrea...e-10912-2.html

Third: Full underbelly pan
http://ecomodder.com/forum/showthrea...q45-11402.html

Fourth: rear skirts and 30.4mpg on trip!
http://ecomodder.com/forum/showthrea...tml#post247938
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Old 08-22-2012, 10:48 PM   #6 (permalink)
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OK, i will slow down to 75, the speed limit.

I would rather not take 8 hours to get where i am going so driving 45 isnt an option.

This is long haul cruise control driving. thats 90% of what this truck does.

Mostly looking for aero mods like a belly pan and closing gaps, but i dont know if that will help much.
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Old 08-22-2012, 10:55 PM   #7 (permalink)
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Volt, gas only - '12 Chevrolet Volt Premium
90 day: 38.02 mpg (US)

Volt, electric only - '12 Chevrolet Volt Premium
90 day: 132.26 mpg (US)

Yukon Denali Hybrid - '12 GMC Yukon Denali Hybrid
90 day: 21.48 mpg (US)
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lower it, front air dam, bump up the air pressure.
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Old 08-22-2012, 10:59 PM   #8 (permalink)
GRU
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silver bullet - '00 Honda Civic
90 day: 34.41 mpg (US)
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It's very hard to improve fuel economy with a SUV. I had a Ford Escape and didn't find many things work. I dont think closing gaps will help since the vehicle is so big.

Belly pan or big front air dam and a partial grill block is your best bet
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Old 08-22-2012, 11:11 PM   #9 (permalink)
herp derp Apprentice
 
Join Date: Oct 2008
Location: Lawrence, KS
Posts: 1,032

Saturn-sold - '99 saturn sc1
Team Saturn
90 day: 28.28 mpg (US)

Yukon - '03 GMC Yukon Denali
90 day: 14.4 mpg (US)
Thanks: 42
Thanked 315 Times in 226 Posts
might try looking through forums for your truck, see if any of the tuners/programmers are helping mileage.

on long interstate hauls i try to follow the fastest traveling largest and/or worst aero vehicle i can find. before i got my scangauge i wouldnt of thought any less than riding someones bumper would have helped, but with it i can see that there is some benefit even several seconds back
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Old 08-22-2012, 11:22 PM   #10 (permalink)
herp derp Apprentice
 
Join Date: Oct 2008
Location: Lawrence, KS
Posts: 1,032

Saturn-sold - '99 saturn sc1
Team Saturn
90 day: 28.28 mpg (US)

Yukon - '03 GMC Yukon Denali
90 day: 14.4 mpg (US)
Thanks: 42
Thanked 315 Times in 226 Posts
if you have a roof rack take off the cross bars
cover/seal up the opening in the bumper cover, dont think theres any coolers behind that

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