Jumped time need to reset it chain does not look broke nor does the cams look like they have lost any teeth..
Can I get the diagram that shows the markings for setting the timing chain? on 1999 Chevrolet Malibu
Tensioner probably failed and allowed the chain to jump , replace both tensioner and chain , inspect guides for wear and replace them also if needed. Check "www.alldatadiy.com" , or "youtube" for visuals on chain set-up , if getting a chiltons or haynes manual is not feasible.