uptou2bu

These trucks are hit and miss on mileage with the cylinder deactivation. You should be getting around 20 mpg if not something isn't right. Some have been having a problem with the 4 wheel drive being engaged and not showing that it is. Outside of that it could be a giant list of issues. I got rid of mine, made them take it back.

Thanks all for the info.

I dropped it off with the dealership this morning. The end mileage average was 1581 miles, 16.8 mpg at 95% interstate driving.I stopped the sale so it's actually their truck. I told them they could fix it, sell it,auction it, whatever I didn't really care.

Just thinking , that guy I work with had them put a leveling kit and 20' tires on his and he hasn't had any issues.

Thanks the dealer will have it back in a couple of days and what ever it takes they will get it fixed or they will keep it. They had the tires on it when I picked it up.

LT285-65-18

I couldn't tell you with the vehicle I have now it's super screwed up, but I have never noticed much of a difference on any of my other vehicles. I've heard it both ways from people. The only real way to tell is drive and do the math. I couldn't tell you with the vehicle I have now it's super screwed up, but I have never noticed much of a difference on any of my other vehicles. I've heard it both ways from people. The only real way to tell is drive and do the math. I couldn't tell you with the vehicle I have now it's super screwed up, but I have never noticed much of a difference on any of my other vehicles. I've heard it both ways from people. The only real way to tell is drive and do the math. I couldn't tell you with the vehicle I have now it's super screwed up, but I have never noticed much of a difference on any of my other vehicles. I've heard it both ways from people. The only real way to tell is drive and do the math. I couldn't tell you with the vehicle I have now it's super screwed up, but I have never noticed much of a difference on any of my other vehicles. I've heard it both ways from people. The only real way to tell is drive and do the math.

Why thank you, at this time I have their complete and undivided attention.

No I'm 52 and spazed was a nice way to put it, I raised mortal hell right at the verge of server violence. I have an extremely low tolerance for bullshit and don't appreciate when a business tries to treat me like a moron. They quit ****ing when I stopped payment on the 14K down payment check. How's that for a plan. I now have their complete and undivided attention and now they are well aware that they can keep it or fix it, preferably keep it because they already said they are all like that.

No I'm 52 and spazed was a nice way to put it, I raised mortal hell right at the verge of server violence. I have an extremely low tolerance for bullshit and don't appreciate when a business tries to treat me like a moron. They quit ****ing when I stopped payment on the 14K down payment check.

Yea it is installed and they checked it on the machined and right after they told me that all of that way is when I spazed out on them.

It has BF Goodrich all terrains factory size, they came on it. Only had it three days. Another dealer said the same thing.

At 16 around city is acceptable, 16.5 on the highway is not and shouldn't be for anyone.

​I didn't say anything about trading, I stopped payment on the 14K down payment and said fix it or keep it don't care which one.

Seamonster I was wondering the same thing about the gear ratios. I would think it would matter considering from what I have read everything seems to affect it; fuel pressure, torque, transmission shift, torque converter, oil pressure, manifold vacuum, brake vacuum, voltage, temperature, etc. With my limited knowledge I believe these systems are way to sensitive when comes to engaging and disengaging. For example there is no reason these vehicles should drop out of V4 mode when going up a slight incline like an overpass on the interstate and they should be able to engage V4 and stay that way with the cruse control set at 75mph on at flat interstate highway. I was told this morning by a new purchaser that the 2015 Silverado manual actually states that it supposed to do that. I have a 2014 Silverado LTZ 4x4 which I purchased 11-20-15 and the V4 mode will not engage above 58 mph on flat interstate highway and I just tried this on a 600 mile run; all interstate. Average MPG was 16.3 which is deplorable and a far cry from what it should be getting. (58 MPH ON THE INTERSTATE WILL GET YOU KILLED) 11-21-15 advised dealer of issue while in route, they said drive it let it adjust and bring it back when you get back in town. Two days later spoke to the dealer advised them of no change and poor performance and they said all of them are that way. That didn't settle well with me and I advised them I stopped payment on the 14K down payment check. That got their attention, I said you can fix it or keep it. With all this being said I believe that the GM AFM system is inadequate at best and they are completely misleading customers of the capability reliability of this system.

I believe from my limited experience with this setup that in real world settings these trucks will never see what they are advertised and prompted to do. They told me that on the interstate they would run in V4 mode at speed limit, well I know of no interstate highway that it is even safe to run 58 mph continues for this thing to work. The worst readings in mpg 25 so far is 13.2. So far real world is between 15 & 16 mpg overall average. I could do this good with a Dodge. Good bye Chevy truck.

Kind of late but hey I purchased a certified 2014 Silverado LTZ 4x4 on 11/20/15, drove over 600miles the next day on the interstate (flat road) and could not get the AFM to engage at all over speeds of 58 mph and the dealer says that is normal. 16.2 mpg and believe me I am not happy with this truck . I've already block payment and started repair or take it back proceedings. I don't really care which one.

Kind of late but hey I purchased a certified 2014 Silverado LTZ 4x4 on 11/20/15, drove over 600miles the next day on the interstate (flat road) and could not get the AFM to engage at all over speeds of 58 mph and the dealer says that is normal. 16.2 mpg and believe me I am not happy with this truck . I've already block payment and started repair or take it back proceedings. I don't really care which one.