New Silverado 1500

I have a 2015 Silverado Crew Cab with the Sportsman package. I leave it in2 wheel drive, not the automatic position. So far I have 3300 miles on it and average a little over17 mpg. It may be better but it's been cold out so I always warm it before I leave.

Yes, the mileage will improve, no doubt about it.

I have a 2015, bought a year ago, and at 500 miles the mileage jumped, and again at 10000 miles I think. For the mileage to jump at EXACTLY those points tells me the computer is running some sort of break-in protocol.

I think your mileage will improve a little, seems to on the new vehicles I have had. I also think that it's very important to go easy on a new engine for the first 1000 miles or so. I think GM recommends 500 with no towing now but I always do a little more and I change the oil at 1000. This may be over kill but I was a career A/C maintainer and as an old guy have had a lot of new engines and never had to open one up. It's not as important as it used to be but if you are planning to keep the vehicle, a long time, especially one for towing it will pay off in the long run.

dreeder wrote:
Hand calculate your MPG's to get as accurate an idea as possible. My lie-o-meter and hand calculated MPG's mirror each other on my 1500 Silverado (so I guess my lie-o-meter, isn't a liar after all..:)) but that isn't always the case, plus your truck is so new.

They are not really lie-o-meters, many folks don't realize the average MPG calculated by the vehicle is over time, hand calculations are for each tank of fuel between fill-ups. I've notice the option to change your vehicle MPG calculations over the past x number of miles on some vehicles (not my 2013 Ram).

I did an experiment with my 2013 RAM 1500. For one year, I tracked the MPG reported by the truck and my hand calculations, the difference between the two methods was 0.837082108 MPG, the vehicle reading on the high side. I won't argue that the delta is significant but may be explainable given the expansion/contraction of gasoline and the error in filling the tank to exactly the same level at each fill-up.

nofoolin wrote:
When I test drove my 2wd max tow with 3.73, it had 5 miles on it. I put on a few more during my test drive, and it showed something like 7 mpg. Well, I thought about it and realized that it had a service life of cold starts and being shut down. Right off the factory floor, parked in the factory lot, started up again, run over to the rail yard, off and up onto the rail car, to the transporter, to the dealer, dealer prep, out to the sales lot, one test drive before me, my test drive... Lucky to have gotten what it did with all the cold starts, heavy acceleration, etc.

Limiting cold starts and idling where possible, I have gotten 25 mpg going 5 over the speed limit on a 100 mile loop 90% highway and freeway with speeds of about 1/2 @ 60 and the other half @ 70mph through rolling terrain with a several miles of 6% grade. I usually get 20 - 23mpg when not driving for mileage on the highway.

The mileage in this vehicle is very dependent on the way the driver drives and uses the throttle. Use the DIC and try to keep the truck in 4cyl mode as much as you can if you are looking for mpg. My low axle ratio probably helps me in that regard as I'm surrounded by hills and mountains in the valley where I live. With that said, it can be quite a pig when driven moderately hard. Best 400 mile average I had was 20.4 mpg with 50/50 driving. Now I just enjoy the truck and pay the gas bill. Congrats, hope you enjoy yours.

I have a similiar experience with the 5.3 and 3.08. After 17k miles, my vehicle average is 19 mpg. I have had the vehicle since July. It has towed trailers, hauled stuff, and driven daily. It does a great job of running in 4cyl mode if you are light on the throttle. My best 50 miles is 28.4, and my best 400 is 24 mpg. I have noticed a reduction of close to 2 mpg since winter started. I use the OnStar and remote start to make sure my truck is warm when I get in.

Hand calculate your MPG's to get as accurate an idea as possible. My lie-o-meter and hand calculated MPG's mirror each other on my 1500 Silverado (so I guess my lie-o-meter, isn't a liar after all..:)) but that isn't always the case, plus your truck is so new.

When I test drove my 2wd max tow with 3.73, it had 5 miles on it. I put on a few more during my test drive, and it showed something like 7 mpg. Well, I thought about it and realized that it had a service life of cold starts and being shut down. Right off the factory floor, parked in the factory lot, started up again, run over to the rail yard, off and up onto the rail car, to the transporter, to the dealer, dealer prep, out to the sales lot, one test drive before me, my test drive... Lucky to have gotten what it did with all the cold starts, heavy acceleration, etc.

Limiting cold starts and idling where possible, I have gotten 25 mpg going 5 over the speed limit on a 100 mile loop 90% highway and freeway with speeds of about 1/2 @ 60 and the other half @ 70mph through rolling terrain with a several miles of 6% grade. I usually get 20 - 23mpg when not driving for mileage on the highway.

The mileage in this vehicle is very dependent on the way the driver drives and uses the throttle. Use the DIC and try to keep the truck in 4cyl mode as much as you can if you are looking for mpg. My low axle ratio probably helps me in that regard as I'm surrounded by hills and mountains in the valley where I live. With that said, it can be quite a pig when driven moderately hard. Best 400 mile average I had was 20.4 mpg with 50/50 driving. Now I just enjoy the truck and pay the gas bill. Congrats, hope you enjoy yours.

Have you tried resetting the avg mileage readout since you got it?

Thanks to all, for your help.

After only 20 miles neither you nor the computer have any remote idea what fuel mileage you're getting. That's too small a sample to be even slightly accurate.
Our new 2015 Chevy 3500 at work get's about 11 mpg loaded to 9,000 pounds with the 6.0 and 4:10 gears. After 10,000 miles it may be creeping up to 12 mpg.