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Old 03-24-2016, 01:09 PM   #155
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I had the 6.2 in my Yukon and towed my 25 in the mountains of NC and WVA. It did great till 110,000 miles and the engine had a major internal problem that required rebuilding. I immediately traded it for a Diesel. I have since been told the 6.2 is not a great engine for heavy duty towing. The 6.0 is more of a truck engine and handles the load of towing better. I am sure the eight speed transmission was better than my five in the 2010. I got 8 to 9 MPG and the mountains of WVA will separate the good tow vehicles from the not so good ones. I recommend the GMC diesel highly!
That's partially true. An all aluminum block is not for HEAVY grunt work....like towing a backhoe off-road in uneven terrain and pullin' stumps. That's why the 6.2 isn't available in a 2500. It is assumed the preponderance of 2500 buyers will be commercial buyers.
That said, the aluminum block 6.2 is way more than substantial enough for any travel trailer towing....of course (soap box time) assuming you stay within the "numbers". (true for ANY vehicle)
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Old 03-24-2016, 02:54 PM   #156
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Lingenfelter supercharger

Has anyone installed a supercharger on a 5.3 V8? Lingenfelter advertises 475 hp with theirs and it seems like an alternative if you can't find 6.2 V8
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Old 03-24-2016, 11:56 PM   #157
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The Lingenfelter Supercharger that you're talking about is a Magnuson Supercharger Kit installed by Lingenfelter but with a Lingenfelter tune. Both the Magnuson and the Edlebrock Aftermarket kits use Eaton Superchargers.

Boosting the output via supercharger (or turbocharger) is more expensive than the 6.2L Ecotec3 engine and will likely lack the 8 speed transmission. Also, you won't have the bigger radiator, rear axle, etc.

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Old 04-04-2016, 07:26 PM   #158
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4 days with the new Denali, 6.2, the 8 speed and the magnetic shocks, and I am very pleased with the upgrade over my 2014 5.3, 6 speed with the all terrain package. Both trucks were the new cab design so all aspects are the same other than what's mentioned above. A noticeable difference in power, the transmission seems well matched and the magnetic shock package seems to take the pogo effect out that I was getting with the all terrain package. I do not have max tow so am limited as to what I can haul in the back, but my wife and I and the dog, we travel light with the International 27. Happy with the upgrade, like the Denali package and wanted to stay in the 1500 chassis because 80 percent of my miles are not hauling a trailer.
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Old 04-06-2016, 09:17 AM   #159
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Originally Posted by Maineiac View Post
4 days with the new Denali, 6.2, the 8 speed and the magnetic shocks, and I am very pleased with the upgrade over my 2014 5.3, 6 speed with the all terrain package. Both trucks were the new cab design so all aspects are the same other than what's mentioned above. A noticeable difference in power, the transmission seems well matched and the magnetic shock package seems to take the pogo effect out that I was getting with the all terrain package. I do not have max tow so am limited as to what I can haul in the back, but my wife and I and the dog, we travel light with the International 27. Happy with the upgrade, like the Denali package and wanted to stay in the 1500 chassis because 80 percent of my miles are not hauling a trailer.
Without the maxtow, what all are you loosing? Do you loose the extra cooling in oil cooler, trany, and radiator? I am looking at this engine also, but with all the bells it is pushing $50K after discounts.
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Old 04-06-2016, 09:27 AM   #160
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Assuming a non- Maxtow has HD towing package, you will lose:

1) Rear Spring rating (Maxtow has heavier rear springs)
2) Heavier 9.73" rear axle with beefier housing
3) Maxtow has 3.42 gear; non-maxtow has 3.23
4) Shocks are different
5) ITBC (unless optioned in a non-maxtow)
6) enhanced cooling radiator
7) 400 pounds in GVWR and Payload and rear axle capacity
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Old 04-25-2016, 10:02 PM   #161
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A friend took me for a ride in his Denali (6.2, 8-speed, non-max tow) and it seemed powerful, quiet and smooth.

His truck has several virtual "gages" on the instrument panel. I think the tachometer and speedometer were the only real gages - otherwise, the oil pressure, etc. were controlled by the Driver Information Center.

Are all these trucks like this? Or, is this only Denali?
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Old 04-26-2016, 10:15 AM   #162
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The LCD display of gauges is unique to the Denali. Lesser trims have real gauges. If you're serious about towing, I would avoid the Denali. It is not available with the max trailer tow package, which adds 400 lbs of payload. That package includes a larger ring gear, different rear axle ratio, different rear suspension. I have the "SLT" trim which has just about everything that the Denali offers other than the badges and trick instrument display. Heated and cooled leather bucket seats, Bose audio, etc., etc. I'm now over 33k miles on my truck and still am extremely pleased.
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Old 04-26-2016, 05:59 PM   #163
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Thanks for the reply. Glad to hear those virtual gages are not on the LTZ and SLT trim levels. I definitely want max trailering package and bench (jump) seat up front.
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Old 04-27-2016, 12:32 AM   #164
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Things may have changed, but in 2015, the 6.2 engine was only available in the Denali or SLT trims (and their Chevy equivalents). I believe the 3-person front seating is not available in those trim levels. We wanted that, too but settled for the buckets and console.
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Old 04-28-2016, 10:27 AM   #165
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Things may have changed, but in 2015, the 6.2 engine was only available in the Denali or SLT trims (and their Chevy equivalents). I believe the 3-person front seating is not available in those trim levels. We wanted that, too but settled for the buckets and console.
6.2L with 8speed, max tow are options now on some models now. Very attractive....wondering about life of engine towing an AS; any experience from owners with 100K miles + is appreciated.
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Old 04-28-2016, 11:52 PM   #166
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Doubt this information is available. The 6.2 motor is new as of 14' Why wouldn't you think it would last as long as any other GM engine? I've been driving mine around since this past December and have nothing but praise for itů Kinda pissed that I paid more for the left over 15 than what you can now purchase a new 16 forů.
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Old 05-01-2016, 09:15 AM   #167
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Originally Posted by bpcaudill View Post
Doubt this information is available. The 6.2 motor is new as of 14' Why wouldn't you think it would last as long as any other GM engine? I've been driving mine around since this past December and have nothing but praise for itů Kinda pissed that I paid more for the left over 15 than what you can now purchase a new 16 forů.
Pat..
I had read a thread about oil build up on the aluminum heads (?) can happen after a while since these engines were not built to pull heavy loads. I am not an expert here, just trying to get more data. I like the specs on this engine, and am looking for a long term replacement for my F150 EB. Don't want to go diesel nor 3/4 T TV, so the 6.2 w/ 8 speed is very attractive.
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Old 05-02-2016, 12:25 AM   #168
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I believe this engine and its little 5.3 liter brother were developed just for this application (although the 6.2 is related to the same size engine that runs the Corvette). In any event, I have 35 k miles on my '16, the great bulk of it towing my FC 27, without any issues. It even accepts a tank of 87 octane once in while without protest. Towing mileage ranges from a worst case high 11s to a best case high 13s, towing at 55-60 mph.
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