Hello i have a 2020 Silverado 3500hd 6.6 gas as a wrecker . Since I’ve purchased it brand new you change the oil and after 1000-1500 miles all the oil is gone . Message comes up engine oil low add oil and you check the dipstick and not one drop off oil is there . No leaks what so ever and truck doesn’t smoke . I know I’m not the only one with this issue cause another person i know bought the same truck also a wrecker and the same thing happened to him . Anyone know what this could be ? Or the solution ?