[jaypeeone]

Is it possible to have the dealership service department reprogram my '06 LBZ to compensate for larger than stock tire size? I'm trying to avoid spending $400+ for a programmer when all I want to accomplish is this correction.

 

[ratlover]

What size tires?

 

[jaypeeone]

Correction

Went from 245/75R16's to 285/75R16's.

 

[mikek996]

there is no calibration for that size tech 2 only goes up to 265's. there is alist of avalible tire sizes on tech 2 but you would need to know rolling circumfrence of 285' and then try to find one similiar on the list.

 

[RichLockyer]

Tech-2 only corrects the ABS computer.
To change the speedo you need a Predator, Bullydog, or $omething $imilar.

 

[Cobra#3747]

never used one, but here it is, summit sells it for aroud 140.00 if I remember right

http://www.granatellimotorsports.com/granspeedo.htm

 

[RichLockyer]

never used one, but here it is, summit sells it for aroud 140.00 if I remember right

http://www.granatellimotorsports.com/granspeedo.htm

Shows as 94-06.... likely will not work on the '06 Duramax with the 32 bit data bus.

 

[Cobra#3747]

Depends on where it ties into. I would imagine it just takes the signal to the cluster and changes it. Just guessing though, really need to ask them.

 

[jaypeeone]

Correction

Thanks Guys,
Contacted Tech Support at Granatelli. They say so long as the vehicle has a "Vehicle Speed Sensor" wire between the speedo and the computer, this product will work great. He was 99+ percent certain it does have that wire but recommended I confirm before placing the order. It comes with crimp connectors and attaches to the VSS wire.
According to him, it's "Programming For Dummies". . and it better be!:beerchug:

 

[RichLockyer]

Thanks Guys,
Contacted Tech Support at Granatelli. They say so long as the vehicle has a "Vehicle Speed Sensor" wire between the speedo and the computer,

May or may not be 100% of what you want.
There absolutely is a VSS (aftermarket GPS systems tie into it), but I believe the odometer is controlled and stored in the ECU.

Think of it as an extended warranty

 

[driveline]

265 size

was at stealer to see about recal for 265/75 16 at this time there is no recal as per tech support .They say in two mounths time. Stealer did try with tec 2 . Odometer is out 2.3

 

[drdave]

Here is a link to show what speedo error occurs with tire changes...

http://www.miata.net/garage/tirecalc.html

doesn't help with you computer, but cool anyway. drdave