Upgrading Os on E67

[Taz]

Is this an actual 2006 CTS-V, or a custom vehicle ?

Are you exceeding the 512 g/s MAF limits ?

If this is an actual 2006 CTS-V, then trying to use a 2008 TBSS tune (12618164) will result in an inoperative Starter, inoperative Cruise Control, an inoperative Tach, and probably a host of other issues - and the CTS-V APP (accelerator pedal) will not work with a TBSS calibration.

[Naf]

This is an actual 2005 CTS-v where i swapped the engine harness and module for a 2006.

If i lose that much, i will try the colorado 09 OS