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PontiacStrong65's 1965 Tempest Station Wagon

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On 7/8/2019 at 10:43 AM, GFrazier2016 said:

Does anyone know of a reliable & trusted source for custom tunes on a 2005 GTO?

We are located in the southeastern US. 



For my '05 Grand Prix, I used Will (owner) at Overkill Performance (http://getoverkilled.ca/). It's a Canadian company (I'm in Michigan). It was a few years ago he did my tune but, depending on what you want to have done tune-wise, you can send in your PCM, he'll flash it and send it back (or you can eat the cost of the core, like I did, and keep your current PCM).

That said, even though his website doesn't list, specifically, GTO's (check his website, he does / has done a lot of different GM platforms as well as a lot of non-GM vehicles), I would still drop him a line ([email protected]) to see if he's open to a GTO tune.

For what it's worth, when I installed the tuned PCM he sent me, I literally had only driven the car a quarter mile and I was already smiling at how much the tune woke things up. Event though comparing a given tune / vehicle to another tune / vehicle isn't necessarily apples-to-apples, I say this to say that I have been very pleased with his work and, from other Grand Prix groups that I know of first hand, so have many other customers.

Hope that helps at least a little.

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