There are 1 owner-reported engine complaints for the 2004 Hummer H2in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
I OWN A 2004 HUMMER H-2, NO ALTERATIONS TO THE ENGINE, DRIVE TRAIN, OR CHASSIS. WHILE DRIVING THE VEHICLE WILL STALL. THIS VEHICLE WILL JUST SHUT OFF AT FREEWAY SPEED. I TOOK IT TO THE DEALERSHIP AFTER THE LAST EVENT ONLY TO BE TOLD THE FOLLOWING DAY THAT THE TRUCK IS FINE AND NOT STALLING. *TR
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