Please login or register.

Login with username, password and session length
Advanced search  

News:

Keep CAFCNA Alive! Become a Supporting Member Today!

Pages: [1] 2  All   Go Down

Author Topic: What makes an Avalanche get better mileage?  (Read 6078 times)

0 Members and 1 Guest are viewing this topic.

74Rallye

  • Full Member
  • ***
  • Offline Offline
  • Posts: 107

Hi,
I am shopping for an Avalanche and I have a few things to learn before I buy one.
What options or features lend themselves to better fuel economy? Are there tuning tricks that make a difference?

Thanks.
Logged

AVinSbyCt

  • Full Member
  • ****
  • Offline Offline
  • Posts: 502
Re: What makes an Avalanche get better mileage?
« Reply #1 on: 02/20/13 09:28 AM »

It's a 6000 lb brick. Best milage I ever got was when it's in the driveway in the mirror of the bike!
Logged
'12 LT All Star Edition 4X4 Steel Gray Metallic/Ebony Leather Interior with power sunroof, K&N drop in filter, WeatherTech floor liners, Molded splash guards, Mag Lite Mod, Color Matched Bowties, Color Matched Bugflector II, WeatherTech in channel side window deflectors, Front Windows tinted, Autowoods console trim, Chrome tow hooks, Fuel Throttle 20x9; Cooper Discoverer AT3 275 55 20, Corsa cat back sport exhaust, GM stainless door sills, GM Avalanche license plate frame, BedRug

74Rallye

  • Full Member
  • ***
  • Offline Offline
  • Posts: 107
Re: What makes an Avalanche get better mileage?
« Reply #2 on: 02/20/13 09:45 AM »

Has anyone switched to synthetic lube in the engine, trans and diffs and noted a change in mpg? My old 1500 picked up close to 2 mpg in cold weather after a total swap to syn.
Logged

tritonboulder47

  • Full Member
  • ****
  • Offline Offline
  • Posts: 786
Re: What makes an Avalanche get better mileage?
« Reply #3 on: 02/20/13 10:08 AM »

- Intake (High flow filter, cool-air intake, throttle-body spacer)
- Exhaust (Headers, High-Flow Cats, High-Flow Muffler(s), bigger diameter exhaust pipes)
Remember, your engine is basically a big air pump...  The easier you make it for air to enter and exit it, they more efficient it will be...
- New Plugs
- New Plug Wires
- Programmer
- Synthetic Liquids (Engine Oil, Trans Fluid, ect...)


Stuff like that will get you a gain...  Unsure on how much though...
Logged
Rollin' in my 2 Z's
2003 LPM Cladded Av Z71 5.3L 4X4 - 1985 Camaro Z28 Tuned Port 5.0L



911 Calltaker / Dispatcher, Volunteer Fire Fighter & Fire Policeman, Volunteer Ambulance Driver, Rescue Tech, Emergency Lighting Guru

ltxi

  • CAFCNA 2014 Supporting Member
  • Full Member
  • *
  • *
  • *
  • *
  • *
  • *
  • *
  • *
  • Offline Offline
  • Posts: 2,553
  • ...tree art...
Re: What makes an Avalanche get better mileage?
« Reply #4 on: 02/20/13 02:49 PM »

The only otb options that can make any significant difference would be rear gear ratio and possibly tires.
Logged
2008 Z71 Avalanche LT3 4x4 4:10 Ebony/Black - Nelson tuned

GHP

  • CAFCNA 2011 Supporting Member
  • Full Member
  • *
  • *
  • *
  • *
  • Offline Offline
  • Posts: 375
  • Yo!
Re: What makes an Avalanche get better mileage?
« Reply #5 on: 02/20/13 04:45 PM »

Antigravity shoes - or a really light foot.
Logged
O7 4WD LT3, Dark Blue Metallic, Amber DRLs, De-badged, GM CAI, Corsa Touring Exhaust, Dual Batteries, Waag Front Runner, 8000 HID, IPCW LED Taillights, Daystar Leveling kit, XD Addicts, Terra Grapplers.


http://grady-y0.mybrute.com

74Rallye

  • Full Member
  • ***
  • Offline Offline
  • Posts: 107
Re: What makes an Avalanche get better mileage?
« Reply #6 on: 02/20/13 05:49 PM »

On a truck I used to have ('86 K series) I swapped in 3.07 ratio gears. I didn't see an increase in mpg. (???) I think the combination of poor aerodynamics and having an engine that was getting tired kept me from seeing an improvement.
Logged

RedRocketZ28

  • Full Member
  • ***
  • Offline Offline
  • Posts: 203
Re: What makes an Avalanche get better mileage?
« Reply #7 on: 02/21/13 06:00 AM »

A tune will help the most.  I have been messing with my trucks tune, via HPTuners, to adjust it during cruise.  Have leaned it out a bit and messed with a few other things and have gotten a little better mileage.
Logged
2002 Z71 - CAI, Tune
2001 Z28 1SC - stock bottom end LQ4, Speed Inc. TU1, Turbonetics 7875, stock 4L80E w/ HD2, Circle D 3500, stock 10 bolt w/ 2.73's, E85

Vaeagleav

  • CAFCNA 2018 Premium Member
  • Full Member
  • *
  • *
  • *
  • *
  • *
  • *
  • *
  • *
  • Offline Offline
  • Posts: 4,370
  • The Avalanche just keeps getting better!
Re: What makes an Avalanche get better mileage?
« Reply #8 on: 02/21/13 06:52 AM »

The biggest effect on MPG is the driver. If you drive it like an old man and are gentle on the gas and brakes and stay at a moderate cruise on the highway you will get best MPG. As mentioned the AV is very heavy at 6,000 lbs and is not very aerodynamic. Changing gears may help for an overdrive gear but if you change you lower gearing you may cost MPG since the motor has to struggle to get the 6,000 lbs. up to speed.
I used my tow/haul mode with a full load in the Blue ridge mountains and got 24mpg on a trip. The tow/haul mode changes the shift points and helps getting up to speed. Overall though i get about 14 in town with lots of stop and go or sitting in a parking lot. On the highway I usually get about 18-20 mpg. I decided a long time ago that I didn't buy an AV for gas mileage and the positive aspects far outweighed the MPG. When i want MPG I ride my Harley.
Logged
2008 Z71 Silver Birch 
2004 Z71 Silver Birch before that.

utahpablo

  • Full Member
  • ***
  • Offline Offline
  • Posts: 219
Re: What makes an Avalanche get better mileage?
« Reply #9 on: 02/21/13 08:49 AM »

 :thumbsup: ol' man driver here....been getting 18.7 all around in the new '13 with only 1,300 miles!
Logged

adamjeeps

  • CAFCNA 2009 Supporting Member
  • Full Member
  • *
  • Offline Offline
  • Posts: 304
Re: What makes an Avalanche get better mileage?
« Reply #10 on: 02/21/13 10:42 AM »

Find Ethanol-free gas if you can. Coast as much as possible. Moderate acceleration. Draft off of big-rigs (not safe but works). Air up the tires to 35-40 psi.
Logged
GONE BUT NOT FORGOTTEN: 2007 Black LT3 Z71 4x4 Maglite Mod Antenna Delete Mid-Deck Headrest Mod Onfair Headrest DVDs - Traded for:
2013 Lincoln MKT Ecoboost

74Rallye

  • Full Member
  • ***
  • Offline Offline
  • Posts: 107
Re: What makes an Avalanche get better mileage?
« Reply #11 on: 02/21/13 03:58 PM »

It sounds like I will need to drive like an old man with a good programmer type of tune . I'm not hung up on gas mileage or I would be looking at something Japanese. By the way, is the Honda Ridgeline like the Mini-Me of the Avalanche?
I want something that offers protection, functionality and the ability to tow. And I've always wanted one since the first time I saw one!
Logged

JBro

  • Member
  • **
  • Offline Offline
  • Posts: 11
Re: What makes an Avalanche get better mileage?
« Reply #12 on: 02/21/13 04:54 PM »

ridgeline does not have the mid gate opening the avalanche does and will tow less, per fueleconomy.gov, they get the similar mpg
Logged

Didit

  • CAFCNA Cruise Coordinator
  • Full Member
  • *
  • *
  • *
  • *
  • *
  • *
  • *
  • *
  • *
  • *
  • *
  • *
  • *
  • Offline Offline
  • Posts: 4,799
  • I love the Chevy Avalanche
Re: What makes an Avalanche get better mileage?
« Reply #13 on: 02/21/13 05:21 PM »

I could be wrong I usually am, lol.   But I think all the fluids in the 13's are synthetic, I was told this before they came out at the dealership, (in early 12),  talking about the oil (dexos) and it was mentioned then, I have not followed up to see if any changes had been made at rollout though.

Didit
Logged

ltxi

  • CAFCNA 2014 Supporting Member
  • Full Member
  • *
  • *
  • *
  • *
  • *
  • *
  • *
  • *
  • Offline Offline
  • Posts: 2,553
  • ...tree art...
Re: What makes an Avalanche get better mileage?
« Reply #14 on: 02/21/13 05:31 PM »

It sounds like I will need to drive like an old man with a good programmer type of tune . I'm not hung up on gas mileage or I would be looking at something Japanese. By the way, is the Honda Ridgeline like the Mini-Me of the Avalanche?
I want something that offers protection, functionality and the ability to tow. And I've always wanted one since the first time I saw one!


Bottom line is an Avalanche will never get "good" fuel mileage. It's a niche vehicle/truck that's heavier than a Suburban and in any kind of normal use is stuck in the mid to upper teens dependent on use and no matter what you do.

My solution to gas mileage problems has always been practical...a bigger fuel tank. So, the Av fixed the issue I had with my previous truck, an ext cab Silvy.
Logged
2008 Z71 Avalanche LT3 4x4 4:10 Ebony/Black - Nelson tuned

74Rallye

  • Full Member
  • ***
  • Offline Offline
  • Posts: 107
Re: What makes an Avalanche get better mileage?
« Reply #15 on: 02/22/13 03:51 AM »

17-18ish mpg would be great! I have one car that gets 8-9 mpg, but they are fun miles.
Logged

ltxi

  • CAFCNA 2014 Supporting Member
  • Full Member
  • *
  • *
  • *
  • *
  • *
  • *
  • *
  • *
  • Offline Offline
  • Posts: 2,553
  • ...tree art...
Re: What makes an Avalanche get better mileage?
« Reply #16 on: 02/22/13 03:22 PM »

That's a practical goal for majority highway miles, going light on the lead foot.
Logged
2008 Z71 Avalanche LT3 4x4 4:10 Ebony/Black - Nelson tuned

jesusfreak2111

  • Full Member
  • ***
  • Offline Offline
  • Posts: 76
Re: What makes an Avalanche get better mileage?
« Reply #17 on: 02/22/13 04:28 PM »

I dont know about everyone else, but I am getting very good gas mileage for a 4x4 truck. I have a k&N cold air intake, dual flowmaster exhaust, and a diablosport tuner. I have been running mobile1 full synthetic oil for over 3 years now. I usually average around 16-18 city, and up to 22 highway. Total average for combined driving is about 18.

Forgot to add that I also changed the plugs and wires, I am running msd super conductor wiresets and ngk iradium plugs
« Last Edit: 02/22/13 04:30 PM by jesusfreak2111 »
Logged
2005 Z71 LT. Fully loaded, 17" XD series SPY wheels, 2" wheel spacers, hunter brush guard, MSD super conductor wireset, repainted cladding, custom camo bow tie, decals removed, all on high, dual flowmaster series 40, spectre cold air intake, diablosport predator tuner, BFG all terrains, hornblasters train horn with 2 gal. tank mounted in saddle bag, 2 10" xplod 1100 watt subs and 1200 watt amp under rear seat, sony dvd player, rear view camera, sail panel leds, euro taillights, and as always, more to come!

SamHouseIII

  • CAFCNA 2010 Supporting Member
  • Full Member
  • *
  • *
  • *
  • *
  • *
  • *
  • Offline Offline
  • Posts: 7,699
  • mmm!! mmm!! Good!!
Re: What makes an Avalanche get better mileage?
« Reply #18 on: 02/22/13 04:56 PM »

I am right about 16 and I have a tune.....
Logged
Commitment, Integrity, Results!!

Don't knock road kill till you try it!!

millwright

  • New Member
  • *
  • Offline Offline
  • Posts: 5
Re: What makes an Avalanche get better mileage?
« Reply #19 on: 02/23/13 09:02 AM »

Its a trade off. Size, comfort and ride = low gas mileage. I just traded up from a 02 to an 08 and saw a little bit of difference, but I think driving habits can make the biggest change. I love my Av and wouldn't trade it for something for better MPG's
Logged

naylor99

  • Charter Member
  • Full Member
  • *
  • *
  • *
  • Offline Offline
  • Posts: 895
  • "The future is not what it used to be" A C Clarke
Re: What makes an Avalanche get better mileage?
« Reply #20 on: 02/23/13 09:22 AM »

Having something else to drive when you don't need the truck;



Gets 27-30mpg...
Logged
2013 BLK/BLK 4WD LTZ : Ambers, BedRug, EZ Down, LED bed lights, Maglite Mod, Brushed Alum/Black vinyl interior upgrade, puddle light projectors, LED hitch step, more to come...
2005 Victory Red/Tan WBH Z66 (Sold)
2003 White (long gone)
Member 163, joined 2/15/02

1000000to1

  • Full Member
  • ***
  • Offline Offline
  • Posts: 28
Re: What makes an Avalanche get better mileage?
« Reply #21 on: 03/24/13 04:39 PM »

Spending hundreds of dollars on synthetics, tuners, intakes and exhaust to get gas mileage is stupid. At best you'll get a couple mpg and be lucky to get your money back.  So unless your doing it for other reasons and happen to reap the rewards don't waste your time or buy a car like my wife's g5 gt that gets 40 mpg at 80 mph
Logged
07 LT Avalanche, homemade cold air intake, cats removed with o2 cheats resonator removed and homemade muffler.

CariocaAvy

  • Full Member
  • ***
  • Offline Offline
  • Posts: 37
Re: What makes an Avalanche get better mileage?
« Reply #22 on: 04/07/13 02:06 PM »

Find Ethanol-free gas if you can. Coast as much as possible. Moderate acceleration. Draft off of big-rigs (not safe but works). Air up the tires to 35-40 psi.

I pretty much do the same stuff.  Drive it pretty conservatively and only really get on it when I'm in a pinch to merge into traffic.  That and a CAI probably helped a bit, but as stated by other posters, these babies are HEAVY..
Logged
"Some people spend an entire lifetime wondering if they've made a difference.
The Marines don't have that problem."
- President Ronald Reagan

zr2s10

  • Full Member
  • ***
  • Offline Offline
  • Posts: 119
Re: What makes an Avalanche get better mileage?
« Reply #23 on: 04/12/13 05:47 AM »

It sounds like I will need to drive like an old man with a good programmer type of tune . I'm not hung up on gas mileage or I would be looking at something Japanese. By the way, is the Honda Ridgeline like the Mini-Me of the Avalanche?
I want something that offers protection, functionality and the ability to tow. And I've always wanted one since the first time I saw one!


The only reason to get a Ridgeline is if you want less power and the same mileage compared to the Avalanche.  Or if you're a die-hard Honda nut that wants a "truck".  My uncle bought one a few years ago, and mocked me when I said he should've bought an Avalanche.  He said, "Why would I want to pay all that money for gas!"..amongst other anti-Chevy things.  He soon realized he couldn't tow worth a crap, and his mileage wasn't any better. He sold it less than a year later and bought a crew cab Dodge.
Logged

Thomcat

  • CAFCNA 2013 Supporting Member
  • Full Member
  • *
  • Offline Offline
  • Posts: 998
Re: What makes an Avalanche get better mileage?
« Reply #24 on: 04/12/13 07:00 AM »

The only way you can get good mileage in an Avy is to constantly drive it downhill!

The extra money you pay for gasoline is not for really for the gasoline but for the comfort and versatility of the vehicle. Besides, the money I have saved in delivery fees, , removing trees, and traveling with my ass riding in safety and comfort have more than offset any extra costs for gasoline.
Logged
Current Chevys - '16 SilveradoZ71;'13 Malibu LT; '15 Traverse LT2; '15 Camaro LS
Previous Avys - '07 Silver Birch LT, '12 Black LT;'13 Fairway Green LT Z71
Previous  Chevys: '11 Tahoe LT; '11 Malibu LS; '06 Colorado WT; '80 Citation (a FWD POS -turned me off Chevys for 15 years); '75 Impala; 72 Chevelle; '69 Camaro R/T; '65 Impala SS; '62 Nova; '59 Impala; '53 model 210
Other: '80 Cordoba, '84 Crown Vic, '88 Crown Vic, '90 Fleetwood, '96 Taurus, '99 Cirrus, '00 Explorer, '02 300M, '04 300M, '06 T&C miniv
Pages: [1] 2  All   Go Up
 

Page created in 0.13 seconds with 23 queries.