Vibration while driving '20 Silverado

tcurlee

Original poster
Member
Mar 28, 2015
61
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 ?
 

Mooseman

Moderator
Dec 4, 2011
26,302
Ottawa, ON
Is this with the infamous 8 speed tranny? If so, it has multiple issues and lawsuits to go with them. Shuddering is one of those issues.
 

tcurlee

Original poster
Member
Mar 28, 2015
61
Is this with the infamous 8 speed tranny? If so, it has multiple issues and lawsuits to go with them. Shuddering is one of those issues.
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 ?
 

Mooseman

Moderator
Dec 4, 2011
26,302
Ottawa, ON
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.
 

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