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After the Sierra won the PickupTrucks.com 2014 Ultimate One-Ton HD Challenge the Silverado racks up another win for GM!

http://special-reports.pickuptrucks.com/2015/01/2015-light-duty-v-8-challenge-results.html

The 6.2L V8 decimated all challengers 0-60 both loaded and unloaded

http://special-reports.pickuptrucks.com/2015/01/2015-light-duty-v-8-challenge-acceleration.html

The 6.2L V8 decimated all challengers in the 1/4 mile both loaded and unloaded

http://special-reports.pickuptrucks.com/2015/01/2015-light-duty-v-8-challenge-quarter-mile.html

The Silverado stopped quicker than all challengers by a significant margin

http://special-reports.pickuptrucks.com/2015/01/2015-light-duty-v-8-challenge-braking.html

The 6.2L V8 decimated the competition in unloaded fuel economy getting a whopping 19.8mpg and 19.6mpg during the testing

http://special-reports.pickuptrucks.com/2015/01/2015-light-duty-v-8-challenge-fuel-economy.html

The 6.2L V8 decimated the competition in the Davis Dam Hill Climb

http://special-reports.pickuptrucks.com/2015/01/2015-light-duty-v-8-challenge-davis-dam.html


The GM twins and the 6.2L V8 didn't just win, it was an utter domination!!! A cold slap in the face for everybody who says the new Silverado isn't good enough to beat a new F150 or Ram 1500. It's back to the drawing board for the competition! WAY TO GO GM!!!

This test also backs up my belief the 6.2L V8 should be the standard engine in every Silverado. Unbelievable power with excellent real world fuel economy!
 

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I saw this. GM has some real winners here.

0-60 in 5.9? Nearly 20mpg? In a fullsize pickup!?!?!?

I've seen it recorded as low as 5.4 seconds 0-60 and around 14.0 1/4 mile. Traction becomes a big problem, but I believe this makes the Sierra/Silverado the fastest production fullsize crew cab truck ever made and it's not even a "sport truck"!

Can't believe how they walked all over the F-150 and Ram in both power, acceleration and fuel economy. F-150 wasn't a Ecoboost, but the Ram has no excuse.
 

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I wish I had the 6.2L in my Silverado, the 5.3L is not even close. The 6.2L Silverados were so rare when I bought mine I settled for the 5.3 and regret it. I am hoping a Diablo tune (or something similar) will make the 5.3 perform better. Otherwise if I find a 6.2L configured to my liking I may trade for it.
 

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The 5.3 is one of the reasons I ended up at Ram. 355 hp, versus 395 hp for the 5.7 Hemi, plus an 8 speed. You should be able to select the 6.2 without having to shell out $55k for a truck.
 
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I wish I had the 6.2L in my Silverado, the 5.3L is not even close. The 6.2L Silverados were so rare when I bought mine I settled for the 5.3 and regret it. I am hoping a Diablo tune (or something similar) will make the 5.3 perform better. Otherwise if I find a 6.2L configured to my liking I may trade for it.
Have you tried running the E85 fuel? E85 bumps HP/Torque to something like 383/400 if I remember correctly. I'd be interested in hearing if its noticeable.
 

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I have tried E85 on several occasions. Here is what I found out. First you have to fill up with E85 when you are very close to empty or there isn't much difference. It doesn't seem to make much difference starting from a dead stop and punching it as the torque management seems to prevent rapid throttle response and just seems to dial out the increased torque coming out of the hole. Midrange is where you can really feel the difference. If you are already rolling at say 20MPH or more and you punch it, there is a considerably quicker respnse and much stronger acceleration. The penalty is horrible fuel economy. My mileage drops from a typical 18.5MPG in mixed driving to 12MPG using E85.
 

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I have tried E85 on several occasions. Here is what I found out. First you have to fill up with E85 when you are very close to empty or there isn't much difference. It doesn't seem to make much difference starting from a dead stop and punching it as the torque management seems to prevent rapid throttle response and just seems to dial out the increased torque coming out of the hole. Midrange is where you can really feel the difference. If you are already rolling at say 20MPH or more and you punch it, there is a considerably quicker respnse and much stronger acceleration. The penalty is horrible fuel economy. My mileage drops from a typical 18.5MPG in mixed driving to 12MPG using E85.
But with the cheaper cost for E85 isn't it a wash?
 

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Have you tried running the E85 fuel? E85 bumps HP/Torque to something like 383/400 if I remember correctly. I'd be interested in hearing if its noticeable.
The power is not the problem. 355 should be plenty, it's the transmission programing that makes the 5.3 feel underpowered. You can wake your truck up with a tune, but there goes the 5/100K warranty right out the window.

I have a 6.2 and a 5.3. The 6.2 suffers from the same problem, but it's much less noticeable.
 

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The power is not the problem. 355 should be plenty, it's the transmission programing that makes the 5.3 feel underpowered. You can wake your truck up with a tune, but there goes the 5/100K warranty right out the window.

I have a 6.2 and a 5.3. The 6.2 suffers from the same problem, but it's much less noticeable.
What tune are you familiar with and what results can be expected? I am not concerned with the tune causing GM to deny warranty coverage, as long as I can restore the original before i take it in for warranty work.

Are you familiar with Diablo t1000?
 

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What tune are you familiar with and what results can be expected? I am not concerned with the tune causing GM to deny warranty coverage, as long as I can restore the original before i take it in for warranty work.

Are you familiar with Diablo t1000?
Both of my trucks are bone stock with the GM factory tuning. The only tuning I'm familiar with is EFILive, which I had on a Duramax about 5 years ago. I don't intend to tune either of my truck because I want to keep my factory powertrain warranty intact.

Here is a thread on tuning the 2014+ trucks: http://www.gm-trucks.com/forums/topic/158551-2014-engine-transmission-tuning/page-1
 
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You can restore it but they will know anyway. Tune = no warranty, sorry
Diablo claims their tune cannot be detected by GM, but I don't know that I'd trust it. Diablo is the only company willing to make this claim.
 

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