A mysterious Chevrolet Colorado prototype has been spied undergoing testing in southern Europe.

A mysterious Chevrolet Colorado prototype has been spied undergoing testing in southern Europe.

While our spies can't agree on what the model is, they're suggesting it's either a prototype for the US-spec ZR2 or a prototype for the next-generation international variant.  We, however, think it's a facelifted version of the international variant. 

While nothing is official, the international variant was introduced in late 2011 which means it's ripe for a facelift.  The prototype also has taillights from the international variant and was seen testing alongside the Trailblazer, which itself is based on the international version of the Colorado.

If that is indeed the case, the facelifted Colorado will likely feature a new front bumper, a revised grille and restyled headlights.  The camouflaged rear end also suggests the truck could receive a new tailgate.

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