There are 4 owner-reported fuel system complaints for the 2006 Hummer H3in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
TL* THE CONTACT OWNS A 2006 HUMMER H3. WHEN THE VEHICLE WAS STARTED, IT SHUT OFF WITHOUT WARNING. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC WHERE IT WAS DIAGNOSED THAT THE FUEL RELAY AND THE FUEL PUMP NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED, BUT THE FAILURE RECURRED. THE CONTACT CALLED EDWARDS CHEVROLET BUICK GMC CADILLAC AT 712-366-9400 (LOCATED AT 3400 SOUTH EXPY, COUNCIL BLUFFS, IA 51501) AND WAS INFORMED THAT THERE WAS NO RECALL. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND REFERRED THE CONTACT TO NHTSA. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 91,000.
I BOUGHT THIS H3 HUMMER USED AND IT RAN GOOD UNTIL LAST YEAR. IT WOULD NOT START AT DIFFERENT TIMES BUT AFTER YOU WAITED 10 MINUTES, IT WOULD START. WE JUST PAID 1300.00 TO HAVE THE FUEL PUMP REPLACED LAST WEEK. NOW IT WON'T START AGAIN. I HAVE SEEN MANY COMPLAINTS ON THIS AND THERE SHOULD BE A RECALL ON THIS PROBLEM.
I HAVE A 2006 HUMMER H3, EVERY 2 OR 3 DAYS THE MOTOR WILL TURN OVER ,BUT WILL NOT START. I LET IT SIT FOR 5 MINUTES AND IT WILL START RIGHT UP. I'VE TAKEN IT INTO THE DEALER TWICE FOR THIS PROBLEM AND THEY CAN'T FIND ANYTHING WRONG WITH IT. *TR
I HAVE TWO 2006 H3 HUMMERS BOTH WITH THE 5 SPEED MANUAL TRANSMISSION. UPON ACCELERATION FROM A STOPPED POSITION IN FIRST GEAR, DEPRESSING THE CLUTCH FOR THE SHIFT INTO 2ND GEAR THE ENGINE RPMS REVS TO ABOUT 4000 AND STAYS THERE. SHIFTING INTO 2ND GEAR & RELEASING THE CLUTCH THE RPMS DROP BACK DOWN. ACCELERATING TO ABOUT 3000-3500 RPMS, DEPRESSING THE CLUTCH, AGAIN THE RPMS CLIMB TO AROUND 4000 AND STAYS THERE. THE SAME THING OCCURS DURING UP SHIFTS ... THIS HAS HAPPENED NO LESS THAN 7 TIMES ON ONE H3 AND 5 TIMES ON THE OTHER H3. THE HUMMER DEALER CAN FIND NO STORED CODES, AND CAN NOT DUPLICATE THIS. GM HAS BEEN NOTIFIED, BUT NOTHING HAS BEEN DONE TO REPAIR THIS PROBLEM BECAUSE THE DEALER CAN NOT SUPPLY DEFECT CODES. THIS HAS BEEN GOING ON SINCE AUGUST '06 WITH NO END IN SIGHT. I HAVE ASKED THE ECU BE EITHER REFLASHED OR REPLACED AND WAS TOLD IT WAS TOO COSTLY TO JUST PUT PARTS IN WITHOUT ANY CODES. I BELIEVE THE SOFTWARE COULD BE CORRUPTED. AND IS NOT AWARE ANYTHING IS WRONG. THUS THERE ARE NO CODES. *JB
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