Jump to content

Recommended Posts

Posted

Can you guys tell me what you are actually getting for gas mileage on the 6.2 engine.

I have heard some pretty good numbers but an wondering what most people say.

Posted

Best single tank I’ve got on highway was just over 25 mpg in my AT4.

 

Consistently in low 20’s unless bucking the wind.

 

 

Sent from my iPhone using Tapatalk Pro

 

Posted

I'm averaging 18 in mixed driving..although I do have a somewhat heavy foot. One highway trip I've taken so far it avg'd 21 ...I've had the truck two months, 2000 miles. 

Posted

I have a '19 LTZ 4x4 without the Z71 package. Currently averaging 18 city/highway mix. Best highway tank I've had so far on the sole trip I've taken(damn you, pandemic) which wasn't all that far, was 23.2mpg.

Sent from my SM-G965U1 using Tapatalk

Posted

12.9 over the last 400 miles. City driving, lead foot, and plenty of idling since I have to eat lunch in my truck now.

Posted

I've mainly driven mine since buying in Jan 20 on highway road trips to my kids 300 miles away. Early on it was 20-21 mpg. Now it's 22+ and my last trip back home was 24 with the AC running. Keep in mind I drive the speed limit, 60-70 and am a self described as SSSSSmooth (other say slow). I added a camper top at some point and I seriously think it helped the MPG. This is on a 2020 Silverado HC, CC, 6.5" bed and Max tow pkg-3.42 

 

Pretty dang amazing considering the power available

  • Like 4
Posted
19 minutes ago, ArTurf said:

I added a camper top at some point and I seriously think it helped the MPG.

Had a Ford F-150 and the shell made it way worse. Outcome varies wildly and I'm glad to hear it helped yours. Been thinking of it.

Posted

New Silverado owner here. I have a 2020 Silverado 1500 Crew Cab short box LTZ 6.2, Z-71 off road and protection package with 20 in wheels and all terrain tires. I’ve only had it for 2 weeks. On a mini road trip up the coast from where I live about 240 miles round trip. With my wife and teenage son. Driving 65-70 on the highway and going 5 over the speed limit through sleepy coastal towns. With the ac on full blast the whole time. This truck averaged an unbelievable 24 mpg. I said no way possible! It’s too new. I decided to stop in and fuel up at the Mobil station up the road from me. And it actually averaged 24.22. With my math. The trucks computer listed mpg as 24.36. I didn’t buy this gigantic land yacht for fuel economy. But I am really impressed with the mpgs if you can somehow keep your foot from going to the floor. Because fast trucks are fun to drive. 

  • Like 1
Posted
7 hours ago, Wiggums said:

Had a Ford F-150 and the shell made it way worse. Outcome varies wildly and I'm glad to hear it helped yours. Been thinking of it.

I can’t prove it helped just seemed that way. Maybe the engine was just getting loosened up. Anyway I’m happy with the top and the mpg

  • Like 1
Posted

2019 GMC Sierra Denali with 25K miles: Last 800 miles with mixed city and highway - 17.6 MPG running nothing but 87 octane 

Posted

2020 Crew Cab RST Z71 w/ 20" A/T's...averaging around 18 mixed highway/city driving. Best so far on a 300 mile roadtrip was about 22-23. Towing our 6400 lbs loaded camper I get between 8-9.

Posted

6400 miles on mine, life of the truck the readout says 18.8, mostly city driving...Covid traffic levels mind you lol. If I keep my foot out of it I have gotten 24.8 best on a 50 mile average (actual trip was about 90 miles where the speed limit is 55 most of the trip. On a normal highway where I run 80ish, I can expect 18-19

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

  • Latest Articles

  • Posts

    • I have never seen GM instructions for the other trucks as per the HD with the 6 speed or the half tons but had got the impression that the HD trucks with the 6 speed were not having the same problem that the 10 speed and pan presented. Also video that I have seen of the HD 10 speed with the gas engine starting in 2024 model year showed that it was a real struggle to even make it work when pulling down hard on the exhaust after undoing the exhaust hanger bracket on the side of the transmission as after all there is little room for the pipe to even go down behind the Y joint as it soon would hit a frame cross member. Also that they had tried just like I did with the gasket off and no way was that pan coming out any way they tried to manipulate the pan. From that as well as the local transmission shop talking about the pain in the rear issue, I was not expecting my pan to come out because GM shows it was not even intended to come out without dealing with the exhaust piping.    It would be nice to claim, here's what you do and its easy to remove the pan guaranteed on any HD truck with the gas 10 speed but dollars to donuts the next guy trying what I did would not have the same luck as the exhaust was just manufactured slightly different and be pissed off at my claim that the pan comes out with no issue. Its more of a try and see if your particular truck might work like mine did .... or not !. 
    • Sorry I didn't see this until now, but it works on both the 6 speed and 10 speeds, as well as all the half tons too.
    • Hello, I have a 2018 GMC Sierra 1500 that I recently changed both motor mounts on due to the driver's side being blown out. After replacement I seem to have a steady vibration that I can feel in the pedals and the back of the seat. At this point I'm convinced that the aftermarket "Anchor" branded mounts I used are not performing as well as OE, the only real reason I ended up using the mounts in question was because my local dealers were out a few months to get a Driver's side mount. I've tried "Neutralizing" the mounts according to the motor mount TSB published for these truck to no avail. My trans mount is also in great shape and seems to be absorbing vibrations swimmingly. As far as I can tell there is no issues idling, my idle RPM is steady and I've recently put GM plugs and wires on, however, I have not cleaned the throttle body or intake valves. Any one else have a similar experience with aftermarket mounts? Patience certainly is a virtue that I wish I exercised here. Thank you!
    • I still saw people out for runs, on their bikes/motorcylces, jeeps with the doors off driving around here the past 2 days. I guess we are just used to it here haha.   Tasted like a bonfire the last 2 days.
    • The TCM has to be flashed before it can drive.   If you installed it the way it is, it has the OS (operating system/program) from the 2010 truck you got it from. That will not match with the VIN/OS pair that your 2013 truck has.   You can do the full install. Then tow it to a dealership and they can flash the trucks PCM/TCM with the latest program for your VIN.
  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...