Hello everyone.

Just a quick message to update everyone on my LS4 computer tuning for Impala/Monte SSs and GP GXPs.

I now have revision 1.5 available with some updates on DoD activation points to operate smoother on a hill/incline, DoD in 4th gear only for smoother around town driving while maintaining highway fuel economy, improved air/fuel ratio tuning with aftermarket intakes that bolt an air filter directly to the MAF sensor, and a little more horsepower on 91+ octane tunes.

I had run into an issue with 2007-2009 ECMs not reprogramming correctly, an issue with the tuning software I use. This is now resolved. All computer cores are completely reflashed with the same hardware and software that a GM dealership uses before being re-reflashed with my performance tune. GM's latest and most up to date software revision will also be used for all my of tunes.

The $99 introductory computer offer on 05-06 computer modules is now expired but I've introduced in its place a $50 discount if you wish to send in your OEM computer modules to be reprogrammed, rather than receiving new modules first. This applies to any year LS4 tune. By using your OEM modules, you'll also benefit from not needing a crank position sensor relearn, which will save you a few bucks. If you can afford some downtime on your vehicle, its a way to get an aftermarket tune at an even lower cost.

For those interested in just a transmission tune, this is up on my website now as well. Cost will be $79.99 plus a $65 refundable core charge on the computer module and $25 shipping to anywhere in continental USA and Canada. If you already have a handheld programmer tune or just want the proven reliability improvements from my transmission tuning, this is a good option for you.

As always, I appreciate the business from fellow W-Body owners and please email me willoverkill@gmail.com with any questions and check out http://www.getoverkilled.ca/LS4CompProg.html for more info on my LS4 computer tune.

Best Regards
- Will

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