Drive Your Truck by Julia Talbot
Home on compassionate leave for his brother's funeral, Navy SEAL Garrison Matthews needs to blow off a lot of stress and grief before he returns to active duty. In honor of his brother, he takes Bettie, the brothers' souped-up vintage truck, out for a spin. A bit of an adrenaline junkie, Garrison has no problem finding trouble. This time trouble's named Walt, and he happens to be Garrison's sister-in-law's brother.
Neither man expects their fun to amount to anything else, but after an injury sends Garrison home for good, he turns to Walt, hoping to start a new life. Walt is a closeted sheriff's deputy, and while he adores Garrison, he isn't sure he's ready to come out... or for such a big commitment. Being fresh out of the service isn't easy on Garrison either. To find their happy ending, Walt and Garrison must overcome their trust issues and get ready to settle down together.