There are 3 owner-reported tires & wheels complaints for the 2009 Chevrolet Suburbanin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
Cooper Discoverer 275-55r20 had a stranger point out a very large bulge on the inner sidewall of my passenger side rear tire. This is the 3rd tire from a set of 4 that has developed the same issue within 3 months. Cooper Tires is not wanting to help resolve this issue. They want the tire dissected and returned before doing anything.
On 05/19/2023 driver's side front wheel removed for brake replacement. Noticed large bulge on inner sidewall of Cooper Discoverer 275-55r20 tire. This was the 2nd tire of a set of 4 that has developed the same issue. Now a third has a bulge. I will submit a 3rd report for it.
Cooper Discoverer 275-55r20 developed bulge in inner sidewall. I was unaware of issue until a stranger pointed it out. That was on 03/08/2023. Since then, 2 more tires have developed the same issue!! The last 2 have been looked at by tire installation professionals and determined to be manufacturer defects.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026