When a die-hard fan of the GMT800s saw a stranger’s 2006 Chevy Silverado Duramax pickup truck with a missing tailgate handle trim, he immediately sprang into action, replacing it for free. His kind gesture has left netizens in awe. On July 17, Grayson Elliott, 18, a Tarrant Country College student who works at Valvoline Instant Oil Change in Keller, Texas, was on his way back from picking up an oil filter for a vehicle they had in their service center when he spotted something that caught his attention. A GMT800 truck (General Motors full-size truck platform used from the 1999 through 2006 model years) that was in the visitor’s parking lot of a retirement home had a missing tailgate handle trim. “I saw it, and I immediately remembered I had a few spare trims in my truck,” Elliott said. “I was really excited I got to use another one, as I …