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What Benefits Will A Tune.....

beav626

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beav626 Enthusiast

beav626

Posted
Posted

Give a truck that is a daily street truck?

 

 

I have a tune in my performance car but I do not race the truck...

DofD Senior Enthusiast

DofD

Posted
Posted

It will let your truck be all that it can be!

 

A tune isn't just for racers. A good custom tune on a truck will improve it's daily driving characteristics.

VMax2007 Senior Enthusiast

VMax2007

Posted
Posted
It will let your truck be all that it can be!

 

A tune isn't just for racers. A good custom tune on a truck will improve it's daily driving characteristics.

 

+1 kazillion gajillion to the bazillionth power. :cheers:

iscsidude Enthusiast

iscsidude

Posted
Posted

I've been considering a tune for some time now.

Can anyone confirm or deny that the ECM/TCM will not tattle to the PCM if I switch from stock to custom when I go to the dealer?

 

I don't want the dealer voiding my warranty if he can detect (via PCM) that I'm switching ECM/TCM.

beav626 Enthusiast

beav626

Posted
  • Author
Posted
Better fuel mileage, better power, better response, etc. It's worth it.

 

 

I am already getting 17city 19-20 hwy

 

 

will a tune do better than that?

VMax2007 Senior Enthusiast

VMax2007

Posted
Posted
I've been considering a tune for some time now.

Can anyone confirm or deny that the ECM/TCM will not tattle to the PCM if I switch from stock to custom when I go to the dealer?

 

I don't want the dealer voiding my warranty if he can detect (via PCM) that I'm switching ECM/TCM.

 

 

The ECM/TCM is the former "PCM" (it used to be one module, but it's now 2, so they renamed them).

 

ECM = Engine Control Module

TCM = Transmission Control Module

PCM = Powertrain Control Module

 

Anyway, just keep your stock ECM/TCM for dealer visits and buy a second set for tuning.

iscsidude Enthusiast

iscsidude

Posted
Posted
The ECM can be changed, but the TCM can not. As far as the warranty goes, it really depends on the person looking at it. My techs (at the dealership I used) were great, knowing all the aftermarket parts I had and never said a thing.

 

It is always good measure to become buds with your dealership service folks!

 

Thanks for the quick reply.

The above quote has me confused. Can I or can I not swap the TCM?

 

Between ECM/TCM/PCM I'm thinking the CM stands for Confused Mode. :cheers:

VMax2007 Senior Enthusiast

VMax2007

Posted
Posted
The ECM can be changed, but the TCM can not. As far as the warranty goes, it really depends on the person looking at it. My techs (at the dealership I used) were great, knowing all the aftermarket parts I had and never said a thing.

 

It is always good measure to become buds with your dealership service folks!

 

Thanks for the quick reply.

The above quote has me confused. Can I or can I not swap the TCM?

 

Between ECM/TCM/PCM I'm thinking the CM stands for Confused Mode. :cheers:

 

 

 

 

 

That only applies to the 6 speed tranny trucks (Denali only in 07-08). Those TCM's are internal in the tranny.

VMax2007 Senior Enthusiast

VMax2007

Posted
Posted
Where is the best place to purchase a spare ECM and TCM? I am also thinking about a tune for my 2008 Denali.

 

 

Since you have a Denali (6 spd tranny), you cannot replace your TCM. Your best bet would be a live (in person) tune.

iscsidude Enthusiast

iscsidude

Posted
Posted
The ECM can be changed, but the TCM can not. As far as the warranty goes, it really depends on the person looking at it. My techs (at the dealership I used) were great, knowing all the aftermarket parts I had and never said a thing.

 

It is always good measure to become buds with your dealership service folks!

 

Thanks for the quick reply.

The above quote has me confused. Can I or can I not swap the TCM?

 

Between ECM/TCM/PCM I'm thinking the CM stands for Confused Mode. :cheers:

 

 

 

That only applies to the 6 speed tranny trucks (Denali only in 07-08). Those TCM's are internal in the tranny.

 

 

Ahhhh. Thanks. Now the light bulb turns on.

Another search turned up the following part numbers.

 

PCM -12597121

ECM -24234503

 

I'm assuming I should substitute PCM with TCM and these part numbers will work on an 08 Sierra 5.3 Liter with 4 Speed Auto Tranny.

VMax2007 Senior Enthusiast

VMax2007

Posted
Posted
Ahhhh. Thanks. Now the light bulb turns on.

Another search turned up the following part numbers.

 

PCM -12597121

ECM -24234503

 

I'm assuming I should substitute PCM with TCM and these part numbers will work on an 08 Sierra 5.3 Liter with 4 Speed Auto Tranny.

 

Those sound right, but the "P"CM should be "T"CM.

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