ecotec 5.3 mpg real world
Oct 10, 2013 | 09:46 AM
#11
TECH Enthusiast
Joined: Jan 2007
Posts: 718
Likes: 0
From: Port Arthur, TX 77642
This week I had the privelage to make a trip in a 14 crew cab 4x4 full size bed with 5.3 and 3.42s. It had All terrain pkg so had aluminum 20s on it. I cleared the mpg guage and checked it via computer of truck and after the 400mile mark with cruise set to 80mph going through Nashville and about 100 miles of stop n go it got 18.9mpg!! I started home and it never changed stayed on 18.9. Also checked compter with calculater and its dead on!! My personal truck is a 10 ccsb 3.73s and 6.2 ran 8.90 at track tune and muffler only. Ive driven and tuned alot of these trucks and this new engine is very impressive!! It almost never kicked down to pull a hill and effortlessly made the journey up the parkway to Centertown KY!! I willnot be surprised to see some trucks in the flat lands of TX get up to 25 or 26 tuned!! Im ordering my ccsb 14 6.2 monday and am super pumped about improvments to the new engine because if they improved it as much as the 5.3 then its gonna be a beast!!! Normally a untuned 5.3 with 3..42s would barely chirp tires from a dead stop wit no power braking and this new engine with lower torque will just murder tires up to nearly 4500rpm from a stop just nailing it!! Overall I was very impressed with truck!! Interior is way diff than my 10 but very comfy and radio is badass!! Intelelink is really intelligent and will play youtube videos audio, rewind pause or fast forward any radio station just wrks really smooh and very easy to figure out!! Mine stayed bluetoothed to my Iphone the Entire time!! Truck is SUPER quiet!! Really unbelievably quiet!! Zero road noise at 80mph!! From what I have learned you can get any gear ratio if you order it so not sure what 3.73s wouldve done to mpg but I kinda think it would help pull it in v4 longer!! No complaints from me at all!! Best GM truck ever made by far!!! My 2010 has 215,000 on it now so time to sell and upgrade!! Cant wait!!! Let me hear other experiences if you have time!! Thanks
Oct 11, 2013 | 01:18 AM
#12
Thread Starter
On The Tree
iTrader: (8)
Joined: Jan 2004
Posts: 171
Likes: 0
From: Bama home of champions
Well the day before dad bought the truck with 3.42s we took a truck home with 3.08s to just be driving it while they were lookn for the 3.42 truck!! DO NOT buy a truck with 3.08s !!!!!!! Its terrible on gas!! Will not get any gas mileage !!! Will not even pull itself!! I though it may have been a fluke on the mpg on the 1rst loner truck or this truck not bn broke in but no!! Soon as we were in the 3.42 truck it was.back to normal 20-22 mpg and only 900miles on this truck!! Worlds of diff in these two!! Oh and after the tune on the sheriffs truck!!!!! All I could do was smile eveeytime I gassed on it!! Could be rolling in 1rst gear and nail it and up n smoke almost!! Then pleasantly greeted with a little spin on the 1-2 shift and then off to the races!! Made alot of difference!! GM got aggressive on the timing tables on this one also but still left alot on the table by the seat of the pants so I incourage you!! Find you a great tuner and spend your money !! If you live close to me!! (1 hr west of bham) gimme a shout on here!
Oct 11, 2013 | 11:02 AM
#13
TECH Enthusiast
Joined: Jan 2007
Posts: 718
Likes: 0
From: Port Arthur, TX 77642
Definitely available on 6.2 with max trailering package and also 20" wheels are an option with the max trailering pkg where I believe GMT 900 only 17" wheels were available. I think, don't remember but max trailer pkg also optional on 5.3.
Oct 22, 2013 | 12:55 AM
#14
Thread Starter
On The Tree
iTrader: (8)
Joined: Jan 2004
Posts: 171
Likes: 0
From: Bama home of champions
Tuned another5.3
Tuned my uncles 5.3 3.42 truck tonight! Responded well withoit a single hickup!! Its a ccsb4x4 oh yeah itll run the 140 on the speedo also!! If you need a video for proof Ill wrk on it!! Trucks run really good with a tune there is about 30hp/tq gain I believe!! Just by SOP feel!! When I picked truck up the last 1500 mpg average was 18.0 thought that was pretty good considering thats in town pulln lawn mower teailer n back n forth to wrk for him never gettn over 55-60 for very long and its only like 6 miles to his wrk from home!!
Oct 22, 2013 | 01:30 AM
#15
Tuned my uncles 5.3 3.42 truck tonight! Responded well withoit a single hickup!! Its a ccsb4x4 oh yeah itll run the 140 on the speedo also!! If you need a video for proof Ill wrk on it!! Trucks run really good with a tune there is about 30hp/tq gain I believe!! Just by SOP feel!! When I picked truck up the last 1500 mpg average was 18.0 thought that was pretty good considering thats in town pulln lawn mower teailer n back n forth to wrk for him never gettn over 55-60 for very long and its only like 6 miles to his wrk from home!!
You have a 6.2 truck on order? Im surprised the dealer took the order for anything less than a denali or a high country PKG.
Thread
Thread Starter
Forum
Replies
Last Post
Choda
MULTIMEDIA (truck related)
12
Jan 22, 2026 02:03 PM
