Jump to content

2014+ Gas Mileage (MPG) Topic

BringTheRain403
 Share

Recommended Posts

CAtaylor Enthusiast

CAtaylor

Posted
Posted

I should mention I took that diesel out for a drive again today. Drove it home in the country and back again, did a bit of running around in town. It was 15mpg, 1mpg better than mine according to DIC. Sent from my SGH-I337M using Tapatalk

My LML averaged 17.5 on the highway before the lift and 33" Toyo's, after it was right at 15. The mileage looked great until it went into regen then it would drop the whole tanks average down at least 2 mpg before it was complete. If you drove it strictly in town you would not get anywhere close to the 15 you were seeing because it would stay in regen most of the time or eventually limp the motor for it not being able to complete the regen after numerous attempts. Don't get me wrong they are amazing trucks but the emissions systems and associated emissions problems is why I got rid of the one I had. If you are debating getting one plan to give it a good highway run at least once every tank. The regen will take about 45min running 75 with a light load.

  • 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

Dnt Senior Enthusiast

Dnt

Posted
Posted

Regen? Lets not do this regen thing then. What did the doctor tell you when you told him it hurts when lift your right arm all the way up? Doctor said Quote "Do not do that!!!!!!!!!!!!!!!"

CAtaylor Enthusiast

CAtaylor

Posted
Posted

Regen? Lets not do this regen thing then. What did the doctor tell you when you told him it hurts when lift your right arm all the way up? Doctor said Quote "Do not do that!!!!!!!!!!!!!!!"

Ha! That was the plan till the feds stepped in and started smoking everyone for offering delete programming; if they would have come out with that ruling a month later I would still be driving the LML.

New2GMC Enthusiast

New2GMC

Posted
Posted

I did a highway trip and decided to reset about Andrew Square a little south of Boston. Took the Boston Byepass through Logan and headed to the North Shore. Being a little unfamiliar with the route I was doing 45;50 mpg and was shocked. 27 mpg for 20 miles when I started hitting stop lights and traffic. Did my business and started heading back. I came down 93 and wondered what straight highway would do . So I reset again and headed south to Boston and South Shore at 50/60 mph. I almost got to my exit when road work turned good driving into bumper to bumper stop and go. So I pulled out the cell and snapped a pic. Not as good as going north but I was driving faster.

 

 

IMG_20140407_114527_334.jpg?auth=co&loc=

svtkidd23 Enthusiast

svtkidd23

Posted
Posted

gygymepa.jpg

Today's trip.. I average 16-17 a tank. That's on 95

 

Sent from my XT1060 using Tapatalk

 

 

liftedSLTsierra Enthusiast

liftedSLTsierra

Posted
Posted

ahu8a8ys.jpgma3uqyze.jpg

You all gotta be running stock or something, this is mine, combination city highway but the trip A is with a 200 mile highway trip.

 

 

Sent from my iPhone using Tapatalk

Inacanyon Enthusiast

Inacanyon

Posted
Posted

ahu8a8ys.jpgma3uqyze.jpg You all gotta be running stock or something, this is mine, combination city highway but the trip A is with a 200 mile highway trip. Sent from my iPhone using Tapatalk

is your speedo corrected for the tires?

liftedSLTsierra Enthusiast

liftedSLTsierra

Posted
Posted

The dealer told me it was, they left the programmer in the truck for me, but i think it could be gradually off as my speed differs from speed trap signs, maybe I'll get it checked next time I'm in the dealer

 

 

Sent from my iPhone using Tapatalk

CAtaylor Enthusiast

CAtaylor

Posted
Posted

The dealer told me it was, they left the programmer in the truck for me, but i think it could be gradually off as my speed differs from speed trap signs, maybe I'll get it checked next time I'm in the dealer Sent from my iPhone using Tapatalk

They told me mine was too but what they did was flash over the Hypertech program when they did the fire recall. If you are passing everyone on the interstate or getting there quicker than expected you need to check it out. Easiest way to find out is to download a GPS App on your phone and compare.

Mike1220 Senior Enthusiast

Mike1220

Posted
Posted (edited)

You all gotta be running stock or something, this is mine, combination city highway but the trip A is with a 200 mile highway trip.

 

 

Sent from my iPhone using Tapatalk

What speed was your truck registering and how was the temp outside? Both make a difference. Only reason I'm asking is I want a lift but will probably go with a 4" and 33" tires. Don't want to knock my MPGs down too low though

 

 

Sent from my iPhone using Tapatalk

Edited by Mike1220
liftedSLTsierra Enthusiast

liftedSLTsierra

Posted
Posted

Well yesterday was probably high 40s low 50s I was traveling at about 65mph registered on the speedo but I would venture to say about 70 actual

 

 

Sent from my iPhone using Tapatalk

CAtaylor Enthusiast

CAtaylor

Posted
Posted

Well yesterday was probably high 40s low 50s I was traveling at about 65mph registered on the speedo but I would venture to say about 70 actual Sent from my iPhone using Tapatalk

What tires are you running? If you plug up the hypertech it will tell you what they have input if you go into the programming section. If it does nothing they overwrote the hypertech program and you will have to call them to have it reset. Install the hardware on your computer before calling them so you can update it accordingly. I run ProComp Xtreme MT2 tires. They are listed as 34.6" OD but actually with the truck load on them they are 33.67".

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

  • Latest Articles

  • Posts

    • BIGBOYS
      Doors lock and mirrors fold in while driving

      By BIGBOYS · Posted

      I have a 2015 Silverado and sometimes I can not get in to the truck. I use the key to unlock the driver door. Something is locking the truck when I unlock it, last night I left the truck open and this morning it was locked with the mirrors folded in. This happens while driving so it is now a safety issue. I reach down for the folding button and they open, then they close again.  Any advice, thank you,   Ed
    • Paul8556
      Headlight issue...

      By Paul8556 · Posted

      Did you ever find a resolution to this? my 2019 Silverado 1500 is showing the exact same headlights issues with the exact same symptoms.  would help a ton if anyone has any advice on this or better yet a known solution..
    • RyanbabZ71
      Gas Prices

      By RyanbabZ71 · Posted

      Wawa and Meijer here have ethanol free (88 & 89) I use for my mower and lawn equipment.  Its not much more than reg.  I paid $3.29 a few weeks ago.  
    • Atlas
      Wow I'm in a pickle. (Broke down truck) and a story.

      By Atlas · Posted

      tl; dr I've now reached the 6th floor of hell. I'm chronicling my journey for my morning readers.   Pulling the top of the intake apart was moderately easy but it involved a lot of parts, connections, and minutae. I was preparing for the new fuel lines to arrive ("nut and bolt kit" it's called). The fuel line connections are notched and held in place by the manifold and a metal plate with a T27 screw.   It's on the back of the intake, under the firewall, with little clearance, and two hard metal fuel lines in the way. I was using Franken-tools (weird combinations of 1/4 inch ratchet with/without an extension, with a bit holder for my T27) to get in there. One of my sockets and bits fell off and has yet to emerge on the floor. I lost a second setup and that's when I almost started throwing tools. But that was the point at which I had gotten traction on the Torx head, and it promptly stripped. No more traction.   I started humming "1-877-kars-4-kids" because I was about at that point. You know what? I'm $1500 into this thing and I can make it disappear just as quickly. This isn't fun anymore. I had spent a lot of time already "tidying" around the engine bay: Fixing all the "someone's been here before!" BS. The truck has been exclusively dealer- and shop- serviced and I'm reminded of why I never let other people work on my cars unless absolutely necessary.   Speaking of dealer service. This truck has a 1" stack of records going back to 1995. I put them all in an excel spreadsheet, date/mileage/description.   The CPI spider has been replaced 4 times in 85k miles. The EGR? Another 4. Multiple, multiple O2 sensors. One Cat. 4? Sets of plugs and wires, and I swear half the stack is diagnosis paperwork for "misfire, runs rough, extended crank, dies at stoplights".   GM was producing some proper crap back then. And it was still well within the era of brittle/crappy plastic. (Windows 95 was released the same month this truck was sold new, we HAD the technology!!)   There (was) a plastic shroud around the evaporator core and HVAC fan in the engine bay. I noticed a chunk of it missing so I poked at it some more and it literally shattered. Touched it some more and pieces were crumbling off. Had a good laugh. Clearly whatever plastic garbage they were using had broken down over 30 years and was literally turning to dust. That was a good half hour of using a shop vac to remove the rest of it.   Back to it.   I was going to give up for the evening but then decided I'm already level 10 pissed off at the stripped screw: G* D* it, give me my tools back -- and my JOY. We'll do this the hard way: The whole intake is coming off.   Blazer won Round II. After finally finding and accessing the 12 intake bolts and using a pry bar to unseat it from the heads, it popped loose in an explosion of gunk and grime raining down into open ports. Awesome.   6 times I reminded myself: Be careful of the temperature sender on the front of the intake.   YEAH, I forgot again and snapped it clean off in the removal. Add another $20 to the ever-growing list of new parts this thing is consuming.   The shame is, long before removing the intake, I had changed the oil in prep for Tuesday's momentous fuel line replacement that was going to be the magic fix and I'd have a running Blazer to tool around in this next weekend. The intake removal, including raining gunk, also gushed dirty coolant all over the valley. Of course it did. Welp, there goes another $35.   I now need an intake gasket set, bolt set, coolant temp sensor, another 5 quarts of oil, some RTV. Don't worry, I've already got 3 new jugs of Dexcool and a thermostat waiting. I'll fill it with clean water first to get it running, dump it, and then add the Dex later on in case... well, let's not go there. I'm only tearing this down once, next time the truck is going on Marketplace for FREE.   Oh, and I'm going to need vacuum hose for all the stupid connections placed at the rear of the engine which have since disintegrated. Come on, GM....tell me you don't do that anymore?   Oh, and the ears on the distributor where the cap screws down are both cracked. I mean, why not put a new distributor in it too. You get a distributor, YOU get a distributor, Everyone gets a new distributor!   This truck isn't out of the woods yet...I'm already questioning how much more time I'm willing to sink in.
    • William Aldrich
      Bent valve in 2025 GMC Canyon Denali - Requires engine swap at 14K miles

      By William Aldrich · Posted

      NewDude, thank you for the suggestions!    I did follow up and the dealer indicates he has an open CX case and is working with DPAC (Dealer Parts Assistance Center).   Per the dealer, GM has had a quality spill and is not providing an update for when a replacement engine will be available.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...