Perf Tunes on New GMT900's w/6.0 VMax

[VMax2007]

I would like to start researching performance tunes such as the Diablo Predator and similar style tuners. Are they available for the new bodystyle GM's, specifically the Vortec Max 6.0 (L76) engines? I would like anyone's opinion on the best tune or handheld tuner's available and on performance tunes in general. I'm listening....

PS I would like to know from a reliable GM source if a perf tune will affect my powertrain warranty. I have heard several opinions on this, including putting the stock tune back in prior to dealer service. But I have not heard anyone say if they are sure it would or would not affect the powetrain warranty.

[danman_s]

It will not effect your warranty if you have a problem and the dealership cannot prove that the cause of that problem was the tune. It could be abit sketchy involving the trucks computer but I've had both my GM and Chrysler dealership tell me that if nothing is broken, my warranty is fine. And if something does break, there are only warranty problems if the modification was directly responsible for the break.

I'm curious on what you find out as well. I want to order a 08 Vmax Silverado and will want to get rid of the engines 4 second power delay asap.

[VMax2007]

Originally Posted by danman_s

It will not effect your warranty if you have a problem and the dealership cannot prove that the cause of that problem was the tune. It could be abit sketchy involving the trucks computer but I've had both my GM and Chrysler dealership tell me that if nothing is broken, my warranty is fine. And if something does break, there are only warranty problems if the modification was directly responsible for the break.

I'm curious on what you find out as well. I want to order a 08 Vmax Silverado and will want to get rid of the engines 4 second power delay asap.

I have heard this before. Sounds pretty risky to me. Say I have a tranny problem, couldn't they pretty much say any tranny problem was caused by the tune (TM removal)? Same with any drivetrain component, right?

I guess I would feel better about it putting the stock tune back in prior to service knowing that the perf tune was undetectable. This could also be a problem if your tranny went out and you needed it towed directly to a dealer (Roadside Assistance). What are you gonna tell them....Tow it to my house so I can remove the perf tune, then tow it to the dealer???

[danman_s]

Originally Posted by VMax2007

I have heard this before. Sounds pretty risky to me. Say I have a tranny problem, couldn't they pretty much say any tranny problem was caused by the tune (TM removal)? Same with any drivetrain component, right?

I guess I would feel better about it putting the stock tune back in prior to service knowing that the perf tune was undetectable. This could also be a problem if your tranny went out and you needed it towed directly to a dealer (Roadside Assistance). What are you gonna tell them....Tow it to my house so I can remove the perf tune, then tow it to the dealer???

Smash the computer, plead ignorance and ask if that was hurting your gas mileage.

[Joe in T.O.]

Originally Posted by danman_s

It will not effect your warranty if you have a problem and the dealership cannot prove that the cause of that problem was the tune. It could be abit sketchy involving the trucks computer but I've had both my GM and Chrysler dealership tell me that if nothing is broken, my warranty is fine. And if something does break, there are only warranty problems if the modification was directly responsible for the break.

I'm curious on what you find out as well. I want to order a 08 Vmax Silverado and will want to get rid of the engines 4 second power delay asap.

What is the 4 second power delay? My 07 Avalanche has the 6.0 I haven't noticed any delay. It is only at 700 km on the odometer.

[sonjaab]

JOE.........What you have is the famous GM torque mgt. program !
The 6.0 and 8.1s are strangled by it !
I can really notice it at WOT !

Some tuners and burned PCM programs override this wonderful feature!
Read this: http://www.fullsizechevy.com/forums/...d.php?t=123667
Why its called the 4 second delay or operating in the closed
loop mode ?????????????????

If I have to use GM warranty service I alway pull my tune out so I
won't have to chance a "warranty denile" issue .
People can carry on about the Mag-Moss. act and the dealer has to
PROVE the mod caused the related failure BS !!!!!!!!!!!!!!

In the meanwhile your vehicle is broke and sitting in the dealers lot
they could care less and your s**t out of luck !!!!!!!!!!!!!!!!!
Unless your willing to pay cash for the disputed repair !!!!!!!!!!!!!!

Been there and done that !!!!!!!.............geo

[VMax2007]

Originally Posted by sonjaab

JOE.........What you have is the famous GM torque mgt. program !
The 6.0 and 8.1s are strangled by it !
I can really notice it at WOT !

Some tuners and burned PCM programs override this wonderful feature!
Read this: http://www.fullsizechevy.com/forums/...d.php?t=123667
Why its called the 4 second delay or operating in the closed
loop mode ?????????????????

If I have to use GM warranty service I alway pull my tune out so I
won't have to chance a "warranty denile" issue .
People can carry on about the Mag-Moss. act and the dealer has to
PROVE the mod caused the related failure BS !!!!!!!!!!!!!!

In the meanwhile your vehicle is broke and sitting in the dealers lot
they could care less and your s**t out of luck !!!!!!!!!!!!!!!!!
Unless your willing to pay cash for the disputed repair !!!!!!!!!!!!!!

Been there and done that !!!!!!!.............geo

Tell me more about your tune. Did you put in a pre-burned PCM or do you use a handheld tuner? What kind? Any recommendations, advice? Any info would be greatly appreciated. I have never done this but am interested in a modest tune for my new truck. I don't want/need a full-blown perf tune that will require me to use premium fuel or anything like that. I don't even necessarily want to get rid of all of the TM. I believe it does have some advantages such as shift quality, etc. But I want to maximize power and throttle response as much as possible too. A "happy medium" if you will.

Thanks!!!

Anyone else please feel free to chime in here as well.

[Mike@Diablo]

Hey guys, a few things to look at here...
For starters, a flash device like the Predator will solve the problem of worrying about the warranty when going to the dealer, as it saves your original stock tune, and gives you the ability to go back to it at any time.
The U7194 we offer for the 07 6.0 will provide an extra 25+rwhp and a ton of torque down low through eliminating the 4 second PE delay.

Thanks
Mike

[VMax2007]

Originally Posted by Mike@Diablo

Hey guys, a few things to look at here...
For starters, a flash device like the Predator will solve the problem of worrying about the warranty when going to the dealer, as it saves your original stock tune, and gives you the ability to go back to it at any time.
The U7194 we offer for the 07 6.0 will provide an extra 25+rwhp and a ton of torque down low through eliminating the 4 second PE delay.

Thanks
Mike

How much $$$? And although I am not a mechanic and have never done this before, I am pretty handy and mechanically inclined (I am a Mechanical Designer/Machine Design). Is this easy to do myself? Does it include easy to follow instructions? I don't want to buy this and find out I cannot do it and end up hiring it done. I am sure it can do a huge variety of mods, how will I know which ones to do?

How easy/quick can the stock tune be put back in? Can this be done on the road in case I need a tow (Roadside Assistance) to take it to a dealer for service after a breakdown?

Thanks!!

[danman_s]

Originally Posted by Mike@Diablo

Hey guys, a few things to look at here...
For starters, a flash device like the Predator will solve the problem of worrying about the warranty when going to the dealer, as it saves your original stock tune, and gives you the ability to go back to it at any time.
The U7194 we offer for the 07 6.0 will provide an extra 25+rwhp and a ton of torque down low through eliminating the 4 second PE delay.

Thanks
Mike

I've heard complaints about the predator occasionally wiping out customers computers and requiring the truck to be towed to the dealership to get a fresh flash. What is the story behind this?

As well, what is with the dip at the beginning of the dyno graph? I thought the 4 second delay was enough that the engine wouldn't start making peak power until around 4500/5000 rpm. From that graph it looks like someone didn't really get onto the throttle until 3000/3500 rpm for both tests.

[sonjaab]

V.........I am using the Hypertech 3 handheld on my 04 6.0.
It sure wakes it up ! But does not address the torque mgmt program
aka the 4 sec. delay ! The Diablo does address the TM program......
And yes I have read from others about folks screwing up their settings
when using the Diablo. But i can figure most folks don't READ the
instructions before they go hog wild with the hand held units !!!!

I prob. would just go for a PCM burn but the chances I would break
my truck workin' it snowplowing and it would be discovered/erased/
altered if the Tech 2 machine was hooked up and something was
reprogrammed by chance....................
I know of guys keeping the stock PCM and having a replacement
burned and installed so they could just swap them out if a dealer
visit was necessary.
But then with a different burned PCM you still need a dealer visit to
set the CPS (crank position sensor) if not then you have a SES
light. Now I read posts from folks stating dealers don't want to
do this procedure ...................

I like my handheld ! I am on the hunt for a new GMT-900 2500 and
when I get it I am gonna try a Diablo handheld this time as my
Hypertech won't work on a 07..................geo

[VMax2007]

Originally Posted by sonjaab

V.........I am using the Hypertech 3 handheld on my 04 6.0.
It sure wakes it up ! But does not address the torque mgmt program
aka the 4 sec. delay ! The Diablo does address the TM program......
And yes I have read from others about folks screwing up their settings
when using the Diablo. But i can figure most folks don't READ the
instructions before they go hog wild with the hand held units !!!!

I prob. would just go for a PCM burn but the chances I would break
my truck workin' it snowplowing and it would be discovered/erased/
altered if the Tech 2 machine was hooked up and something was
reprogrammed by chance....................
I know of guys keeping the stock PCM and having a replacement
burned and installed so they could just swap them out if a dealer
visit was necessary.
But then with a different burned PCM you still need a dealer visit to
set the CPS (crank position sensor) if not then you have a SES
light. Now I read posts from folks stating dealers don't want to
do this procedure ...................

I like my handheld ! I am on the hunt for a new GMT-900 2500 and
when I get it I am gonna try a Diablo handheld this time as my
Hypertech won't work on a 07..................geo

Thanks Geo, This pretty much goes right along with everyhitng i have heard/learned so far. I am going to wait a year or so I think so other's can be the "guinea pig" with the new GMT900's and the bugs can get worked out (either with handhelds or PCM burns). Right now I am leaning toward a new PCM with the tune and keeping the stock PCM. Seems like the safest bet.

Hey, are you the same "Geo" that posts (or used to post?) over at Edmunds? Just curious.

[sonjaab]

Yo V.......That IS you !!!!!!!!!!!!!!!!!!!!!!!!!

Did ya bust those toyoyo troll crybabies too hard and get banned over there??????? Well don't feel bad..I've been several different names and banned a bunch of times since 2000 at good ol' Edmunds from
flamin' on the GM haters over there !!!!!!!!!!!!!!!!!

Wondering where ya been. When the hosts over there give ya the hammer they delete all related posts.......................
I have got several warnings so I have cooled it twistin' the toyo fans. I just dig up all the hidden recall posts/negative toyoyo articles/dismal blundra sales figures and post them to piss off the fanboys!

Anyhoo...I have the Hypertech 3 for my 04 2500 6.0. It peps it up some but does nothing to address the dreaded TH program or as the GM haters call it "the 4 second delay"............

On the hunt right now for a 07 GMT-900 3/4 x-cab 4x4 but GM buypower is not showing the 2500s that are in stock..................
Found a black Chevy and a black GMC equipped the way I need them.
Which one I get will depend on who gives the most trade in $$$ for my 04..................Chevy dealer is offering $21k. Gotta wait till Monday to see the GMC dealer........................

I would prefer the GMC and slap a Denali grill in it. Man they look nice!
Can't get a real Denali because they don't have the snow plow prep. pkg. and if I break it NO warranty !!!!!!!!!!!!!!!!!!Thats why I like the handhelds instead of the PCM burn.
When I get a new truck the Diablo will be my next tuner!
It will eliminate/reduce the dreaded TM !
Then I can do some nice burnouts with the truck instead of
pounding on my Caddy, Z, or Goat !

We will see........keep postin' bro !..............geo

BTW: There are pics of my current black beauty in my sig over at http://www.letstalksnow.com/forums

[VMax2007]

Originally Posted by sonjaab

Yo V.......That IS you !!!!!!!!!!!!!!!!!!!!!!!!!

Did ya bust those toyoyo troll crybabies too hard and get banned over there??????? Well don't feel bad..I've been several different names and banned a bunch of times since 2000 at good ol' Edmunds from
flamin' on the GM haters over there !!!!!!!!!!!!!!!!!

Wondering where ya been. When the hosts over there give ya the hammer they delete all related posts.......................
I have got several warnings so I have cooled it twistin' the toyo fans. I just dig up all the hidden recall posts/negative toyoyo articles/dismal blundra sales figures and post them to piss off the fanboys!

Anyhoo...I have the Hypertech 3 for my 04 2500 6.0. It peps it up some but does nothing to address the dreaded TH program or as the GM haters call it "the 4 second delay"............

On the hunt right now for a 07 GMT-900 3/4 x-cab 4x4 but GM buypower is not showing the 2500s that are in stock..................
Found a black Chevy and a black GMC equipped the way I need them.
Which one I get will depend on who gives the most trade in $$$ for my 04..................Chevy dealer is offering $21k. Gotta wait till Monday to see the GMC dealer........................

I would prefer the GMC and slap a Denali grill in it. Man they look nice!
Can't get a real Denali because they don't have the snow plow prep. pkg. and if I break it NO warranty !!!!!!!!!!!!!!!!!!Thats why I like the handhelds instead of the PCM burn.
When I get a new truck the Diablo will be my next tuner!
It will eliminate/reduce the dreaded TM !
Then I can do some nice burnouts with the truck instead of
pounding on my Caddy, Z, or Goat !

We will see........keep postin' bro !..............geo

BTW: There are pics of my current black beauty in my sig over at http://www.letstalksnow.com/forums

Yep, it's me...Vmax2007, aka jreagan, jsevers, etc, etc, etc from Edmunds.com I hate that forum!!! I'm done over there. I especially hate DrFill, Belias and KdhSpyder. What a bunch of MORONS!!! They used to piss me off with their "Toyota is the best thing since sliced bread and GM sucks" attitudes and they were extremely Hypocritical. They simply could not admit/accept the fact that GM had ANY advantage whatsoever over the Turdra. If Kdhspyder said "Show me numerical data/proof of how the GMs FBF provides any benefit...blah, blah, blah" one more time, I was going to jump right through the computer and rip out his tongue and shove it you know where. What an idiot he is. I'm surprised he aint trolling over here, but then again, maybe he is? Edmunds made a huge mistake because since I left, those truck forums have dried up. There aiint anybody posting on the truck forums at all anymore, it's no fun since I left...hahaha yeah, I'll keep a postin as long as there are Toyoyo fans a trollin. You know when they start getting mad and posting complete garbage that you have them beat and they are gasping their last breaths. it's awesome!!! Stick around, let's have some fun. Any other forums with Toyoyo fanboys that need cleaning up you'd like to recommend?

V

[danman_s]

Originally Posted by sonjaab

But then with a different burned PCM you still need a dealer visit to
set the CPS (crank position sensor) if not then you have a SES
light. Now I read posts from folks stating dealers don't want to
do this procedure ...................

Has anyone done the crank relearn with a MSD Dashhawk? I noticed that this was one of the features and have just ordered a Dashhawk for the hell of it to use with my jeep for now.

http://www.dashhawk.com/parameters.html