Jump to content

2014+ Gas Mileage (MPG) Topic

BringTheRain403
 Share

Recommended Posts

KARNUT Senior Enthusiast

KARNUT

Posted
Posted

I don't know any better so Ill give this a shot. I lose 2 miles per gallon per tank in the city when its cold due to warm ups. Ten minutes in the morning ten at night. One other thing that is weird, if I buy store brand gas I do worse than name brand. I due better with 93 gas than 87. Hope that helps

  • Replies 1.6k
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

Natek
Natek

I think if I was a salesmen I would research the products I would be selling. I wouldn't like it if a customer came in knowing more than me.

nibael
nibael

Mine gets pretty bad mileage at 180 mph. Maybe I should get a bed cover.

Eddie 70
Eddie 70

This was taken last week when I filled up. So far I have put this many miles on the truck. Hopefully it stays like this. We will see.  

Posted Images

Ton J Enthusiast

Ton J

Posted
Posted

EXACTLY! GM needs someone looking at this...even though the southern boys in this thread think we're nuts...this is a real issue in the cold!

 

Where is the GM service Rep? They seem to show up in every other cotton picking thread on this site?!

I don't trust that other Meter that's hook up to AFM system, Its way off and OnStar is to. I trip even the dealerships are back away from that bragging about fuel stuff. They going with 14mpg in city 20mpg hwy. since update. I know everybody wants going with that meter but do a trip meter test and app test on your phone there is no way that math and 2 meters can be off that much. my car has winter gas in it and it still doing 19.9MPG all day. is this truck that sensitive. Its a truck not a toy.

strike1st Enthusiast

strike1st

Posted
Posted

I don't know any better so Ill give this a shot. I lose 2 miles per gallon per tank in the city when its cold due to warm ups. Ten minutes in the morning ten at night. One other thing that is weird, if I buy store brand gas I do worse than name brand. I due better with 93 gas than 87. Hope that helps

Thanks for the input. Auto Start / Warm absolutely effects mileage reading...no doubt...I accept that. I've tried higher Octane and I've tried "top tier" gas. No difference.

 

I operate this truck the same way I did my 2012. It's very frustrating. I have yet to get 300 miles out of a tank of gas in this truck. 260 miles has been the best and that was coasting the thing in on fumes. I expected better, I should be getting better.

  • Like 1
Ton J Enthusiast

Ton J

Posted
Posted

Thanks for the input. Auto Start / Warm absolutely effects mileage reading...no doubt...I accept that. I've tried higher Octane and I've tried "top tier" gas. No difference.

 

I operate this truck the same way I did my 2012. It's very frustrating. I have yet to get 300 miles out of a tank of gas in this truck. 260 miles has been the best and that was coasting the thing in on fumes. I expected better, I should be getting better.

Am in Arkansas and am been having problems with mine I have a lawyer on the case now, Dealer said customers are coming complain about a lot. But it is something to do with AFM system using more gas then less since update.

strike1st Enthusiast

strike1st

Posted
Posted

Am in Arkansas and am been having problems with mine I have a lawyer on the case now, Dealer said customers are coming complain about a lot. But it is something to do with AFM system using more gas then less since update.

 

You're kidding me...you had to get a lawyer? I got sick and didn't make it to work or my dealer for a few days,,,but I'm talking to them now...The only other issue I have is the frigging fog in the headlights all of the time.

Ton J Enthusiast

Ton J

Posted
Posted

 

You're kidding me...you had to get a lawyer? I got sick and didn't make it to work or my dealer for a few days,,,but I'm talking to them now...The only other issue I have is the frigging fog in the headlights all of the time.Its been

Ill be a chevy guy no matter what. its been in the shop several times they even wanted this appointment but the service department said they would tell the same thing that AFM is the problem. Tell your dealer to call Bale Chevrolet in Little Rock talk to Paul Cook 501-221-9191 Service Department

Dnt Senior Enthusiast

Dnt

Posted
Posted (edited)

Hi guys I have been watching my mileage fairly closely and so far I am very pleased with my truck. I hate to see anyone suffer through a problem that is not easily figured out by the dealer. It is going to cause a lot of wasted time for the owner and dealership. I applaud Mr Ton J for hanging in there and demanding that something be done. He took a lot of ragging on this one thread before everyone figured out that he was actually sincere. Mr Ton J please keep us updated on the results. Heck man after this is over YOU may be the one that makes the GM folks figure out their mistake and they can reflash/ retune all our trucks and we will be getting like 30 mpg from here forward BAM 2014 CC SB SLT 4x4 5.3 3.42 20" wheels

..........................

Edited by MyFavTruck
  • Like 1
Ulukslo Enthusiast

Ulukslo

Posted
Posted

The first trip I made in my truck was to IL pulling trailer with 6000lbs approx and it was like 8-10 degrees whole trip. My mileage never changed but I have a 6.2 also. I do live in south in AL but it was under 15 degrees for about 3-5 days and didnt get over 25 for 2 weeks almost and my dads 5.3 wasnt affected. Not sure why its affecting yall up north trucks? Maybe yalls gas is really not as good. Maybe its greater than E10 why not buy a test kit and test it. Im not ragging on you just trying to be helpful. BTW the dealers are not always the smartest cookies in the bunch! Applies for all brands. They still learning about these newbies too!!

Ton J Enthusiast

Ton J

Posted
Posted (edited)

If you've had the "fire Update" GM fattened the mixture, hence the black smoke. Others have reported a significant loss in MPG. I have also, but I would say it's a combination of extreme cold temperature, my new exhaust and a lead foot and the new calibration

 

This a member that lives up north and I seen more. GM trying to stay with originally spec for fuel setting on this engine but when u reprogram it that goes out the window.And I agree 50% might not have problems and thats why GM calls it a win. But there is a problem when truck starts off great and goes bad come on now. We all are customers and chevy die hearts but we deserve better.

Edited by Ton J
Nofastcar Enthusiast

Nofastcar

Posted
Posted

I have filled up 4 times now in my new 2014 sierra 1500 4x4 with the 4.3 V6. About 50/50 highway/city driving and I'm only averaging 25 MPG. No towing or hauling other than a cross bed tool box. Love the truck but this mileage can't be the norm.

 

What are you guys getting?

  • Like 1
dagwood2001 Enthusiast

dagwood2001

Posted
Posted

are you saying that's bad? on a new, unbroken in engine? I have 4,000 miles on my 5.3/V8 and am at 13.2. I'm taking it into the dealer next week and am going to go off.

RobDarden Enthusiast

RobDarden

Posted
Posted

25 mpg sounds like you are doing well...even better than what it's rated.

 

 

Sent from my iPad using Tapatalk HD

cmpcpro Enthusiast

cmpcpro

Posted
Posted

I have 4500 on my 5.3 and if I drive freeway I get great mileage but in town it's all stop and go and all one to two mile trips I can get as low as 9.8mpg

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.5k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,903
    Total Members
    8,960
    Most Online
    RyGuy43
    Newest Member
    RyGuy43
    Joined

  • Who's Online   2 Members, 0 Anonymous, 476 Guests (See full list)

  • Latest Articles

  • Posts

    • davester
      2015 Silverado 3500 right rear turn indicator failure

      By davester · Posted

      consider doing electrical testing?  I would guess some power or ground wire/connection has a problem.   alldata.com has wiring diagrams, connector pinouts and diagnostic procedures you can use to find where the problem is.
    • davester
      My First Project and GMC has me stumped

      By davester · Posted

      can you tell if the reader is actually trying to get codes, and the pcm is reporting none, or is your reader just silently failing because it's not communicating with the pcm?
    • Atlas
      Wow I'm in a pickle. (Broke down truck) and a story.

      By Atlas · Posted

      Any joy with this truck seems to be short-lived.   The CEL for P0172 ("bank 1" too rich) is now "intermittent".   I'm not sure where to check, or re-check, and my energy to keep chasing problems with junk is wearing thin. The P0172 seems to set as I'm coming to a stop, completely off the throttle, when fully warm. At least, that's what it's done the 3? times it's set.   Everything appears normal on the scanner EXCEPT long term fuel trim. There's only one bank on this vehicle because it's an OBD 1.5 with only one upstream O2 sensor. At idle, it's around -16.4% and will dip to -18% occasionally at idle or off-throttle. LTFT approaches 0 when throttle is held at 2500rpm. Short term appears normal, much closer to zero all the time. The LTFT tells me the engine is running rich at idle but compensating at higher load. But, why?   The EVAP purge valve doesn't appear to be leaking/sucking fuel vapor continuously. Is it sticking just as I come to a stop and the engine is choking on fuel vapor and sets the P0172? But that doesn't explain the persistently negative LTFT. Disconnecting the purge valve doesn't seem to make any difference.   I suppose that leaves another dang issue with the fuel injector. A leaking fuel pressure regulator, a new leak in the spider, or a leaking fuel injector/poppet valve I didn't see, or a small crack in one of the spider legs.   The vacuum line leading to the fuel pressure regulator doesn't have raw fuel in it. It doesn't even smell like fuel when it's pulled off, not until you suck air through it, then you can tell it leads to a fuel component. I'd consider that normal? Nothing is signaling this is a FPR issue from the outside, at least.   The oil smells like fuel but it's not building volume. I've noticed most oil in most engines smells like fuel to some degree so it's hard to say if the smell is an issue or not. Or if the engine just still smells like fuel because the crankcase was full of it a few hundred miles ago. But it's been changed twice since that original issue of the leaking fuel line dumping fuel into the intake.   Patience is running very thin. Every win seems to be accompanied by two steps backwards, or another issue that leads to removing at least the top half of the intake manifold. Enough! LOL
    • Chuck FB
      Tire pressure for 37s

      By Chuck FB · Posted

      First off you mentioned "Toyo Says" and then gave the pressures 45/50, was this some person at the tire shop that pulled those numbers out of his head ?   Now of course I can't know your exact axle weights front and rear, however I have much the same pickup as yourself other than not knowing your starting weight as per the pounds the truck rolled out of the factory at due to the options yours did or didn't come with or what you have added beyond the extra tire weight. The correct way to know 100% where a person is at is by weighing each axle with the typical weight the vehicle is driven with and that means taking into account passengers and making sure you figure in a full tank of fuel and a little grace for whatever you may put in the bed "groceries" !    I am looking at and not that it really matters as all the tire companies use the same charts anyway, but I am looking at the comprehensive Toyo tire chart in the section that your tire falls under and I know it sounds confusing but your tire is not an LT metric tire like your factory tire but instead because its a standard inch measured tire its under a different category called an LT floatation series tire. That makes a difference as LT metric tires they don't want to see run below 35 psi at highway speed where as with the LT floatation series it can be run down to 25 psi on the highway as long as the weight on the said size of tire is agreeable with or less than that minimum 25 psi. It blows many people away that how is this physically possible, an empty truck for one thing and larger tires with the same size wheel diameter have a lot more air volume so they can carry the same weight as the smaller tire with less air pressure.    So my truck, I have the stock 275/65R20 wheels and tires and I have a bit of weight in the box with a bak flip cover and a rubber bed mat and some tools and spare gas. The front of my gas truck weighs a bit more than some trucks of the similar spec due to double batteries and alternators. However with full fuel and just me in the truck I am weighted such that I can run 40 front and 35 rear and so that is what I have done since day one.    If I base your truck at or slightly below the weight of my truck, in theory with your tires going by the tire chart you might be right around a minimum of 30 pounds front and 25 pounds rear. Of course that would hit pretty much minimum cold inflation pressure one could run with that tire size and a near empty truck. If you have access to an accurate weigh scale to do individual front and rear axle weights I would suggest you do that and make sure your topped up with fuel and whatever else in the truck before you weigh it and then you will have a great starting point to work off of and figure out what your bare minimum pressures are you can safely run. If you do much in the way of hot weather high speed driving, bumping up a bit for a safety margin is never a bad idea but just depends on what type of driving you do. I will include the Toyo chart and the floatation series sizes start on page 31. Without a doubt at these pressures I am speculating at minimum wise for your truck, it would most certainly ride very different then it did when you were using 55 lb front and rear.     https://www.toyotires.com/media/pxcjubjs/application_of_load_inflation_tables_20200723.pdf
    • Snowcamo
      Possible lifter tick after DOD delete

      By Snowcamo · Posted

      Take an automotive stethoscope to the vacuum pump. Iirc those tick as well. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...