Cylinder Deactivation for 12 Tahoe?

[Recipe7]

I just returned from a Chevy Dealer. I was told that the 12 Tahoe can get 29 or 30 mpg on pure highway because of the Active Fuel Management Cylinder Deactivation.

I was obviously skeptical because the EPA estimates rates the vehicle at 21 highway.

Is the salesman using false figures? Is 21mpg highway the estimate with the fuel management already considered?

 

[clkelley]

Welcome to the neighborhood!

"Technically" he is not lying, but I wouldn't trust him as far as I could pick that Tahoe up and throw it. If you can run it on flat ground at a steady pace with no traffic, wind resistance or anything else you may encounter on the road, it MIGHT get close. Real world? Never gonna happen. I would actually say that the EPA rating at 21 would be outstanding.

 

[Recipe7]

Thanks for the greeting!

I see what you mean. Thanks for clearing that up. I am on the fence between a Tahoe and a Durango. After extensively looking at both, it's starting to come down to simply driving them around, but I may take up the 30 day return offer on both just so I can have 3-4 weeks worth of the vehicle and see which I prefer most.

Hard decisions, but it's a nice problem to have, hehe.

 

[anglarry05]

I have an 08. I was driving from disney to south carolina. I took the scenic route that parallels daytona beach. The road was perfectly straight, no one in front of me, and I set the cruise at 58. I reset the MPG. I was getting a steady 34 mpg for about an hour straight... So yes, its acheiveable, but dont let it fool you that you will have toyota camry economy everywhere you go.

 

[Recipe7]

Wow, impressive.

Yes, I am well aware of what to expect, but for those long highway trips... it's nice to know the Tahoe can pull it's weight efficiently. Thanks for the information!

 

[clkelley]

They are better than older years, and using cruise control is a great idea simply because of how it works in the later year models. I have noticed in mine that the CC keeps it right at the set speed, unlike in older models I have had where it will speed up down hill, or speed up above the set speed up a hill before letting out of the throttle. Mine keeps it dead on, and it is very touchy when it comes to "Feathering" the throttle so to speak.

 

[Recipe7]

That is exactly how my 97 Mazda MPV is. Even my father's 11 Venza... It really is one of the first things I consider since a lot of my driving is highway and I live in a hilly area.

I'm seriously thinking of picking up a Tahoe now... atleast when the 13 models come out, maybe I can afford the 12, hehe.

 

[trysixty]

thats on the the 2011 LTZ, you can actually watch on one of the displays the engine going from using all cyclinders to using just 4 along with the mpg

as for 29-30 mpg on the highway , can be done easily going down a long steep hill. so your salesman is either smart and lying, or just dumb.

 

[anglarry05]

as clkelly and myself stated, its achievable. I've done it. For an hour straight. However, that is with perfectly straight and level road, on cruise. As for normal driving, with traffic, hills, etc, dont expect to keep the 30ish mpg. On my road trips, I normally get about 22-23 mpg at 70-75 mph. Doing 55-60 I can hit 23-25. "Technically" the salesman is not lying