Why? Because it could mean you could be one of 10 lucky OnStar users to win a brand new Chevrolet, Cadillac, Buick or GMC of their choosing.

Here are all the details from autoblog.com.

Starting today, General Motors is holding a car giveaway sweepstakes through its OnStar division. The contest will award 10 lucky OnStar users a brand new Chevrolet, Cadillac, Buick or GMC of their choosing. To enter, contestants need only to push their vehicle’s OnStar button.

According to GM, it’s not necessary for the contestants to be OnStar subscribers to enter – all you need is an OnStar-equppied vehicle and you’re ready to go. The idea here is that non-subscribing customers enter the contest and realize the many benefits of having OnStar.

The winners of the contest will be allowed to pick any General Motors product as their prize – everything from the Chevrolet Corvette ZR1 or Cadillac CTS-V to the Buick Regal or GMC Canyon. (Pick the CTS-V Sport Wagon. You’ll thank us later.) The only vehicle off limits is the illustrious Chevrolet Volt. GM’s contest is open for entries until May 31. Hit the jump for GM’s official press release.

So there you go, sports’ fans. This is definitely a contest to enter so start hitting those “OnStar” buttons! I just happen to know where you can find some too!

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