I thought I would ask the group, before I took it into the dearship to help with this problem. My 03' 2WD GMC Sierra 1500 Crew Cab (2,600 miles) has developed a vibration exactly between 41 to 43 MPH. Higher or lower then those speeds, the truck is fine - smooth. The vibration only occurs at those speeds & it feels like the truck is un-balanced or as if the rear alxe is traveling over very small rumble strips. It is a small vibration that you can feel throughtout the truck when it happens. The only modification that I have made to the truck that could be related, is that I switched out the stock 245/75-R16 Bridgestone's to LT265/75-R16 BF Goodrich tires. The tires have been balanced. It is possible that one of them is unbalanced or do I share this problem with other 1500 Crew Cab owners? I vaguely remember my 94' & 97' Sierra Extended Cab having a unbalanced problem at approx 47 MPH, but I got so acustom to it, I rarely noticed it. This is a bigger vibration. Thanks for your help.
- posted
20 years ago