On [XXX] at approximately 5:30p, I was driving normal highway speed when I saw what I thought was exhaust trailing behind. There were NO dash warning lights, engine temperature showing normal range, car was performing normally. I pulled over to shoulder, turned off car, released the hood latch. My husband tried to open hood but it was too hot. We then realized it was smoke coming from under hood, not exhaust. Smoke began to come inside car through vents. I quickly exited the car, and within a minute the entire front end engine area was engulfed in flames. 911 was called, fire, police, highway patrol responded. Fortunately there was no injury to myself or husband. There was also concern of starting a brushfire risk here in SoCal, but it was all extinguished thoroughly. Truck was towed to Alâs Towing, 475 W Vermont Ave, Escondido CA 92025, ph 760-745-5933. A report has been filed with our insurance USAA, inspection by adjuster is pending. I also notified Temecula GMC, where I purchased vehicle from, of the incident. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)