There are 1 owner-reported fuel system complaints for the 2007 Hummer H2in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
LOUD TAPPING NOISE FROM THE EXHAUST MANIFOLD BOLTS BEING BROKEN IN THE ENGINE BLOCK, WHICH CAUSES AND EXHAUST SMELL EVEN WHEN STANDING ON THE OUTSIDE OF VEHICLE.
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 May 4, 2026