Before the GMC Sierra was its own model, it designated trim levels. Here's the history of Sierra Grande, High Sierra, and ...

GM is elbows deep in development of the next-gen 2027 GMC Sierra 1500, and GM Authority has captured its closest look yet at the upcoming full-size pickup.

The new engineering analysis covers 286,000 vehicles that were part of NHTSA’s original investigation but weren’t covered ...

A Sierra Vista Police Department officer resigned on Tuesday after being indicted on charges of computer tampering for accessing information on the department and state database for personal reasons.