I have a "20 Silverado 5.2 It has a very fine vibration while driving at about 43 or so mph that I feel in the seat, not in the wheel. Noticeable with very light acceleration. Any idea what it might be or has anyone had the same issue ?
Thanks Mooseman, this may be a dumb question but how do I determine if its an 8 speed ? What other type of automatic is there ?? If it is one of those crazy 8 speeds, what recourse is there ?
I don't know what the RPO code would be (and I don't think there is even an RPO sticker anymore). You could try putting your VIN in online VIN decoders as some do list the transmission. Or you could just drive it and manually shift it through the gears and see how high it goes.