elchilero53

A boost in Octane rating will boost the the mpg and power from the engine. Whenever I would tow, I would go up one octane rating. Better pull, better mileage, runs a little cooler. I've done that with all my tow vehicles except my current one; it already requires premium gas so there's no where to go but down.

That is why I got the 6.2L. Mileage is very good and towing ..... wow. It does well and I, too, am well pleased.

With the 3.23, you lose tow rating but gain mileage. It tows just fine as long as you don't get over about 7600 lbs of tow GVWR. Mine is rated to 9,100 lbs (it's a Z71 4x4, so some reduction overall). For what I will tow now and in the future, this is just fine. Plus I use it as a commuter so it is a compromise. If I want to tow a big trailer or a 5er, I will buy a 3500 Duramax anyway. I think the big difference is between the 6-speed and 8-speed tranny. If my old Tahoe had the 8-speed, I would have seen better mileage overall and a better tow rating.

That is about what I am getting with the 6.2 and 3.23 rear as an overall, lifetime average. I am getting 17.6 mpg at 25,100 miles and that includes towing a trailer for 5,000+ miles of that at 10 - 12 mpg. Typical highway mileage is 20 - 21 mpg and around town is 15 - 16 mpg. I am happy with that performance. I got similar mileage numbers with my 2014 Tahoe with a 5.3L, 6-speed and 3.42 rear except my around town mileage was 14 - 15 mpg; my lifetime average (69,000 miles) was 16.9 mpg (including towing about 7,000 miles at 8 - 9 mpg). So those numbers are definitely not out of line.

See my previous response above. I am at 24000 miles and the clunk in the shift from 2nd to 1st on acceleration around a curve is pretty much gone. Personally, I think it was the change from P metric radials to LT tires that made the difference but I could be wrong. I also towed our trailer 3900 miles in April and the truck ran just fine and shifted perfectly. Is this a break in issue? Anyway, I'm glad Boomer1986 got a resolution to his problem but what an ordeal! Shame on GM.

I put a hard, quad-fold tonneau cover on my Silverado and then put light-truck tires on. Mileage held at 20-22 mpg highway and 15-17 around town. The towing characteristics are what really changed significantly. The tow is easier and more stable with much reduced shimmying and tail-wagging. The best mileage I have ever gotten was 34.3 mpg running at 45 - 50 mph with a light foot down some of the local backroads around here. What's not to like!

Nice! That's what I have been getting and am still getting at 23,800 miles! What's not to like?

You might should find out what the gearing in the drive train is. I sounds like you bought an off-road truck geared for steep grades, sandy/boggy areas and impressing chicks rather than commuting and driving around town. New tires probably won't help much at all.

Thanks for that. It was a major shock for us all and a very sad time. The maps on your iPhone are from Google Maps (which is nothing more than a compilation from different map sources); the maps on my iPad are from Google. Using the Apple Play on your truck should make the maps and navigation available to you. Before I had my Android set up on the truck thru Android Auto, my wife plugged her iPhone in to charge it. Apple Play immediately launched and connected her phone to the console screen. Yours should do the same thing. I'm waiting for the new heads-up display to appear. Nothing like a new distraction in the middle of your field of view to make driving more challenging than it already is for most people!

Yes, indeed! Mine still does this on the highway at 65 -70 mph (105 - 113 kph) The best I ever got was 33.4 mpg traveling some back roads at 45-50 mph (72 - 80 kph). The 6.2L is awesome! I won't report the lifetime mpg number because I tow a travel trailer with it and that causes a much lower mpg number than I would get without towing. Towing a 6000 lb trailer I'm getting 11 - 15 mpg generally unless there are strong headwinds or crosswinds then it gets 9 - 11 mpg (yes I slow down).

My 2014 Tahoe navy system did that to me while I was going to my kid sister's funeral back in 2016. I was driving past Madison WI looking for the I-90 bypass and the blasted thing took me right through the heart of Madison. It cost me an hour of extra drive time! Now, I only use it when I'm looking for a particular street. I updated my 2009 Tahoe nav maps and they were STILL badly out of date. My 2017 Silverado nav maps are also about 7 years out of date, so I use my Android smart phone and have the choice between Waze and Google Maps. Waze can be very annoying because it will redirect you to another route without giving you the bigger picture and a comparison of several routes, like Google. And Waze has been wrong on a couple of occasions but does warn you of hazard or the presence of police speed traps.

Had the clunk issue and spoke with my service advisor. He said it was common but went away after about 15,000 miles. It turns out that at 11,000 miles after I changed from P-metric to LT radials, the clunk disappeared. I'm now at 18,000 miles and the shifting is as smooth as silk. Go figure. Had the tachometer flutter after going down an 8% grade pulling a travel trailer holding 20 mph in manual mode. It fluttered between 2nd and 3rd when I shifted back into automatic mode. I put it back in manual after on the straight road, shifted manually up to 8th and no further problems. Spoke with my service advisor and he made a note of it in my service file.

Hmm, let's see ....... Anything that has a "4" as the first number in the caliber.

Unfortunately, the built in nav maps are several years out of date in many areas. I bought an update for my 2014 Tahoe and wouldn't you know it, the map was still two years out of date. I just use the nav setup on my Android phone. At least it updates on a regular basis. ?

What he said. On your Android, a small steering wheel icon appears when Android Auto is active. If you touch that, the screen appears on your truck display and you can choose navigation.

Updated my old 2014 Tahoe's Nav System and maps late in 2015. What joke. The maps were still out of date by more than a year. In my new 2017, I use Google maps while the phone is attached via Android Auto with car mode enabled. The maps and route navigation come up on center display and replace the on board map and navigation screen. At least Google maps updates on a regular basis.