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14 and 15 guys with the Diablo intune, are you satisfied? Im really disapointed with the performance of my new silverado 5.3. For now i have ordered a range device to deactivate AFM and see if that helps. This truck has 3500 miles on it and i HATE to void the warranty but im just about to the point where i dont care anymore. The transmission shifting is horrible, always gears searching, and you have to give it WAY to much gas to get it to downshift from 6th or 5th. Im sure i would get the diablew custom tune with it also. Any reviews are MUCH appreciated. I sold my 2008 tundra for this truck and i felt i have downgraded as far a performance goes so far..

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14 and 15 guys with the Diablo intune, are you satisfied? Im really disapointed with the performance of my new silverado 5.3. For now i have ordered a range device to deactivate AFM and see if that helps. This truck has 3500 miles on it and i HATE to void the warranty but im just about to the point where i dont care anymore. The transmission shifting is horrible, always gears searching, and you have to give it WAY to much gas to get it to downshift from 6th or 5th. Im sure i would get the diablew custom tune with it also. Any reviews are MUCH appreciated. I sold my 2008 tundra for this truck and i felt i have downgraded as far a performance goes so far..

 

I love mine but I have a custom tune with Lew using it. It hasn't voided my warranty 49K miles and no problems from the dealerships Ive been to

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I love mine but I have a custom tune with Lew using it. It hasn't voided my warranty 49K miles and no problems from the dealerships Ive been to

Ive heard a few guys say that some dealerships dont mind it, that makes me a little more comfortable buying it.

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  • 1 month later...

14 and 15 guys with the Diablo intune, are you satisfied? Im really disapointed with the performance of my new silverado 5.3. For now i have ordered a range device to deactivate AFM and see if that helps. This truck has 3500 miles on it and i HATE to void the warranty but im just about to the point where i dont care anymore. The transmission shifting is horrible, always gears searching, and you have to give it WAY to much gas to get it to downshift from 6th or 5th. Im sure i would get the diablew custom tune with it also. Any reviews are MUCH appreciated. I sold my 2008 tundra for this truck and i felt i have downgraded as far a performance goes so far..

 

Amen! I just bought a 2015 Silverado 5.3L with the six-speed transmission and it manages RPMs, shifting and throttle response about as smoothly as a 40 year-old carbureted beater running watered-down gas. It's the first American-made automobile I have purchased in 20 years and now I am suffering from a hefty case of buyer's remorse. I'm chatting with Lew via email right now in hopes that he can help my $40,000 truck run less like a $400 truck and help me shuffle myself loose my immediate regrets.

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I just purchased a 2015 Silverado crew cab standard box 4X4 with 3.42 gears and have no issues with it being sluggish. So I'm guessing that the people complaining have 3.08 gears which are notorious for making the truck feel like a dog.

 

I'd like to see a little more power during certain situations and wondering which power tuner works the best and is user friendly.

 

Thanks, Kurt

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I just purchased a 2015 Silverado crew cab standard box 4X4 with 3.42 gears and have no issues with it being sluggish. So I'm guessing that the people complaining have 3.08 gears which are notorious for making the truck feel like a dog.

 

I'd like to see a little more power during certain situations and wondering which power tuner works the best and is user friendly.

 

Thanks, Kurt

Just my 2 cents: I went with BB for the transmission shifting issues also... but after my transfer case update I went back to stock TCM and really noticed the so called smart transmission really got educated, in my eyes. I did work with Justin and he fine tuned my TCM for a nice clean quick shift so now I'm back to BB engine and TCM tune.

As for performance, I don't expect my 4X4 truck with 3:08 gearing to run like a Corvette or Camaro; It's a truck. It sounds good and shifts nice and quick... I'm happy.

When you get to a certain age, it's not how fast you get there, it's how good you look (and sound) along the way. :crackup:

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  • 2 months later...

14 and 15 guys with the Diablo intune, are you satisfied? Im really disapointed with the performance of my new silverado 5.3. For now i have ordered a range device to deactivate AFM and see if that helps. This truck has 3500 miles on it and i HATE to void the warranty but im just about to the point where i dont care anymore. The transmission shifting is horrible, always gears searching, and you have to give it WAY to much gas to get it to downshift from 6th or 5th. Im sure i would get the diablew custom tune with it also. Any reviews are MUCH appreciated. I sold my 2008 tundra for this truck and i felt i have downgraded as far a performance goes so far..

 

My truck had the same issues when I bought it new and I took it back to the dealership. They installed a new transmission control module and a new valve body and the truck runs much better. I was told by my dealership that my truck wasn't the only one that had this problem. It wasn't a cronic problem but it was definately happening more than they would like. Goood luck!!!

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I experienced the same transmission shifting issues as most of you folks. I went the Intune route which solved the shifting issues but I really didn't notice a significant change in engine performance. In spite of this, I kept the tune installed. Recently, I took my truck in for it's second oil change and, as recommended by Diablo, I reinstalled the OEM tune. I rode around with the OEM tune for a few days prior to the dealer appointment and soon realized that the truck was operating perfectly. The transmission didn't have the indecisive shifting issues it once had and the engine performed at least as well as when the Intune was installed. Considering the risk of losing my warranty, not to mention the potential for bricking my ECM, and the marginal performance improvement, I've decided to stay with the OEM tune. In my opinion, barring actual mechanical issues, a little patience goes a long way with these computer run vehicles. I've done a little research on the 5.3 Ecotec3 motor and have come to realize that it is designed to constantly monitor and adapt to the operator's driving habits and current driving conditions. Modern engines/transmissions aren't the strictly mechanical units of the muscle car days and are probably best left alone to do what they are designed to do.

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