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Chevy Silverado and GMC Sierra Real World MPG Numbers

116 messages,  Last post on Aug 23, 2009 at 6:14 PM

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What is this discussion about? Chevrolet Silverado 1500, Chevrolet Silverado 2500, Chevrolet Silverado 3500, GMC Sierra 1500, GMC Sierra 2500, GMC Sierra 3500, Fuel Efficiency (MPG), Truck


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#113 of 116
2000 Chevy Silverado 1500 2wd extended cab 5.3L by buttermilk
May 13, 2009 (11:22 am)
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I have a 2000 Chevy Silverado 1500 2wd extended cab with 5.3L v8 that now has 194K miles on it.
 
I routinely get 18 mpg here in Tulsa, OK area driving 30 miles one way to work. On the highway on long trips I have gotten above 20 mpg consistantly. Best I've done is 21.8 mpg on a trip to Texas a couple of years ago, and that was driving 73-77 mph, and NOT using the cruise control (I get better mpg w/o using the cruise....due to the way I drive....). On that trip, most of the gas contained 10% ethanol too. That trip average MPG was 20.0 MPG, including some city driving as well.
 
I don't have the AFM on my truck and was hoping that with AFM (I want to get a new truck soon...) that I'd get even better mileage.
 
I also owned a 2000 GMC Sierra Z71 4x4 with 3.73 gears that would do almost as good on the gas mileage. It was a regular cab, short bed truck. Best I ever got with it was 23 mpg (211 miles on 9.0 gallons of gas). On a return trip from Colorado a few years ago, I averaged 20.5 mpg and for the whole trip I went 1941 miles on 101 gallons of gas for a 19.2 MPG average.
 
Makes me wonder if the newer trucks are really getting any better fuel mileage, even with AFM.
 
Regards,
Rog
#114 of 116
Chevy Truck Gas Mielage by hutch54
Jun 07, 2009 (10:07 am)
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Ok....After reading all the post of the gas MPG of the Chevy trucks everyone is complaining about.
Well to tell all...I have 3 chevy trucks, One is a 2001 1500 ext cab 4.8L with 290K, Still get 20mpg doing a commute 0f 200 miles over mountian pass everday. My suburban's 1500 4x4 5.3L, well they have gotten up to 23.8mpg.
 
The MPG on my trucks and other chevy trucks I hvave driven can be done easy.
Don't start off the line like it the drags, do not use the cruise control, and most for the tucks stay under 65. the Sub's 4x4 speed if under 62 will get the most.
 
Oh, yeah ,,,my brother has a Toyota...gets 15 mpg, and his Ford 1/2 ton 4x4 gets 12mpg.
 
I will stay with Chevy's
#115 of 116
Re: Better Mileage! [eaubes] by eck_95z71
Jun 08, 2009 (12:20 am)
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Replying to: eaubes (Feb 28, 2007 2:22 pm)

I drive a 95 GMC Sierra Z71 with an old school fuel injected 350 with LS1 heads, a k&n intake and poweraid throttle body. Even tho its the original engine(minus the heads) and has more than 188,000 miles, it recently dynoed at 394 ponies. I mostly drive hiway and gravel roads and its been gettin close to 21 mpg and around 19 in town. My question to all you GM guys out there is how come the newer, lighter, mostly aluminum engines with better power ratings get worse mileage? My father owns a 96 Silverado as a daily driver and averages 17 mpg hiway with the 5.7 Vortec. This just shows how a few mods which cost close to nothing (bought heads from friend who totalled 01 Z28 for $50) can repeatedly show results on the hiway and still has the power to tear up my 33 inch BFG"s in the mud!
#116 of 116
Re: Anybody?? [cac4] by 2doorpost
Aug 23, 2009 (6:14 pm)
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Replying to: cac4 (Apr 22, 2009 5:46 pm)

2008 Longbed 1/2 ton - no a/c with the V6.
 
Windows up or down on the freeway- 20MPG.

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