Today I realized that my rear passenger door doesn't say GM like all the others I bought my Tahoe with 14,000 miles I've had the car for 4 almost 5 years now and have put 140,000 miles on it and its been through wreck with me. I was ignoring the fact that my car needed 4 brand new tires so i was driving it was raining and i hydroplaned across the highway spun out and hit a light pole on the passenger side front fender mirror fell of and every thing the quarter panel was ripped up and it was pushed up against my wheel and every time i turned my wheel it scrubbed i drove around with my car like that for 3 weeks then i was on my way to work and boom passenger tire blows out then i had a spare and a dent so i was pretty embarrassed and so when i got the car fixed the man replaced the passenger door not the rear door and the quarter panel not the rear door i am now pretty sure that the car was in a wreck before i bought i just was wondering does anybody else door not say GM on it that is pretty odd (This was a little too many details about the wreck)

 

Its very likely the part is an aftermarket part, built to the same specs but manufactured by someone authorized to make the replacement parts...