Two stuck chucks! One drill I've had for about two years and it's stuck “open”. I went to Lowe's two months back and bought the second one as a replacement until I
DeWALT Hammer Drill Repair – How to replace the Chuck - YouTube
How to Replace the Keyless Chuck on a DeWALT Hammer Drill : eReplacementParts.com
How to Change a Drill Bit on a Drill: Milwaukee, DeWalt, & More!