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moderate Owners of the 2006 Hummer H3 have filed 23 NHTSA complaints about the body, typically surfacing around 107,000 miles at roughly $1,500 to repair (U.S. federal records, as of August 2026). Source: NHTSA Office of Defects Investigation. See body across all vehicles →
| Model year | body complaints |
|---|---|
| 2006 H3 (this page) | 23 |
| 2007 H3 | 17 |
| 2008 H3 | 6 |
| 2009 H3 | 6 |
Of the 4 model years of Hummer H3 we track for body problems, this one carries the most owner complaints on file — 23.
If the vehicle is being driving when this occurs, it could strike a following vehicle and cause injury and/or property damage.
The manufacturer has issued service bulletins covering body on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This Preliminary Information communication provides information to the technician about vehicles that have an unusual noise and is difficult to identify, isolate or pinpoint. Technician should get record a sound clip or take a video of the noise for assessment by engineering. Technician will need to call General Motors Technical Assistance Center for further assistance.
full bulletin at NHTSA ↗This Preliminary Information communication provides information to the technician about vehicles that have an unusual noise and is difficult to identify, isolate or pinpoint. Technician should get record a sound clip or take a video of the noise for assessment by engineering. Technician will need to call General Motors Technical Assistance Center for further assistance.
full bulletin at NHTSA ↗THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN THE STEPS ON DIAGNOSING THE CONCERN. VEHICLE'S SUNROOF OPERATION INTERMITTENT, BIND, NOISE, AUTO-REVERSE, AND/OR WATER LEAKS.
full bulletin at NHTSA ↗This Preliminary Information communication provides information to the technician about vibration complaints that are one of the most challenging complaints to accurately diagnose and repair. Technician will need to use Pico Oscilloscope Diagnostic Kit to effectively diagnosis vehicles. Technician should drive the vehicle will using the Pico Oscilloscope to record data. After the data is recorded it should be reviewed to determine the root cause of the concern. If a repair attempt made the concern better but not eliminated or had no affect at all, and are requesting assistance from General Motors Technical Assistance Center record another Pico file and save it to the computer. After the new
full bulletin at NHTSA ↗Underbody Component Corrosion The following information may be helpful when addressing underbody component corrosion with customers. Some customers may comment that one or more of their vehicle's underbody components are showing some form of corrosion. This corrosion may be red in appearance (rust) if the component is steel, forged iron or cast iron. This corrosion may also be grey or white in color if the component is constructed of an aluminum alloy.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
Hood louvers, grills, and facia panels detach at highway speeds, striking windshields and nearby vehicles. The factory adhesive fails—even after recall repair 10V179000, which applied glue as a permanent fix. Owners report the glue from that remedy coming loose years later, with dealers refusing further help.
Water is the other major problem. Sunroof drains clog repeatedly, causing rainwater to pool on the roof and spill through interior openings, the roof mic, and onto the driver while turning. A shop mechanic on record called the drainage design poor construction. Even after paying for drain cleaning, the blockage returns. Water also enters through roof drain holes, damaging electrical panels and sticking ignition switches.
Frame rust shows up by 130,000 miles—visible holes and cracks through the subframe. One owner reported a completely rusted frame with holes throughout, making the vehicle undriveable.
Side trim near roof racks cracks and gaskets separate early. Rear doors leak mud inside despite being closed. The 2006 H3 lacks rear child safety locks—a design decision, not an oversight.
Minor issues include trailer hitch receiver fracture and hood noise at highway speed with parts delays. One owner reported a hood completely detaching and crashing into the windshield at speed.
Same Hummer H3 body reports on nearby years: 2007
Hood louver or grill vent cover detaches or shatters while driving, striking windshield or falling to roadway. Adhesive used in recall repair (10V179000) fails prematurely. Defective adhesive holding accessory bars.
When: 60–169,000 miles; some failures occur years after recall repair
Symptoms owners cite: Hood louver shatters into pieces at highway speed; Grill vent cover falls off while driving; Hood grill detaches completely; Plastic particle from hood fractures and strikes windshield; Louver detaches due to strong winds; Hood facia flies off while driving
Repairs/costs cited: Dealer replaced louver; failure recurred. Recall 10V179000 applied adhesive to hood louver only. Independent mechanic found adhesive from recall repair failed. Owner advised dealer would only glue louver per recall, no further repair.
Recalls/TSBs owners mention: NHTSA Campaign 10V179000 (Structure: Body: Hood) recalls for adhesive application; Campaign 15V421000 (Visibility) issued but parts unavailable. Manufacturer stated recall part out of warranty; refused further assistance on accessory bar adhesion issue.
Sunroof drain holes and drainage system clog or fail to drain, allowing rainwater to pool on roof and interior, spilling through roof mic and interior openings onto occupants. Recurring clogs despite repairs.
When: Throughout vehicle ownership; clogging occurs repeatedly after cleaning
Symptoms owners cite: Water pools on roof after heavy rain; Water spills through roof mic (OnStar) directly above driver; Water drains onto driver's side seat; Water enters interior control panel area; Drain holes back up and overflow into cabin; Water soaks driver when vehicle turns
Repairs/costs cited: Owner paid for drain unclogging a year prior; recurred. Shop mechanic stated design was poor construction. Drain plugs cleaned multiple times without permanent fix.
Recalls/TSBs owners mention: No recall issued despite owner reports of common issue in forums. Manufacturer has not addressed design defect.
Side trim near roof racks cracks; gaskets near rear roof racks separate; trim near windshield fades and comes off.
When: Early in ownership (vehicle is 4 years old at time of complaint)
Symptoms owners cite: Side trim near roof racks cracked; Gaskets near rear roof racks coming apart; Trim on both sides near windshield coming off; Trim appears faded
Repairs/costs cited: Owner reports trim coming off and poses hazard as debris while driving.
Subframe exhibits rust, visible holes, and cracks in structure. Frame completely rusted with holes throughout, rendering vehicle undriveable.
When: 130,000–unknown miles
Symptoms owners cite: Frame rusted on driver's side; Can see through subframe; Cracks in subframe visible; Frame has holes throughout
Repairs/costs cited: Independent mechanic identified subframe rust during oil change. Requires frame replacement.
Recalls/TSBs owners mention: Manufacturer confirmed no recall coverage for subframe rust failure.
Drain holes in top of vehicle allow rainwater to enter interior, damaging electrical control panels and causing ignition switch malfunction.
When: 109,013 miles
Symptoms owners cite: Rainwater enters interior on passenger side; Control panel malfunctions from water intrusion; Key stuck in ignition
Repairs/costs cited: Taken to dealer; failure could not be duplicated; not repaired.
Recalls/TSBs owners mention: Manufacturer made aware; no action taken.
Trailer hitch receiver fractured under normal use.
When: 107,000 miles
Symptoms owners cite: Trailer hitch receiver fractured
Repairs/costs cited: Not repaired; vehicle out of warranty.
Recalls/TSBs owners mention: Manufacturer informed contact vehicle no longer under warranty; no coverage.
Mud enters interior through rear doors despite all doors and windows closed, indicating seal failure.
When: Unknown
Symptoms owners cite: Mud on back of driver's seat; Mud enters from rear doors with all doors and windows closed
Vehicle does not have child safety locks on rear doors. Child opened rear door while vehicle stopped at red light and fell out.
When: At traffic light
Symptoms owners cite: Rear passenger door opens with child inside; No child safety locks available
Repairs/costs cited: Child sustained minor injuries.
Recalls/TSBs owners mention: Manufacturer determined this was a design issue; vehicle model does not offer child safety locks.
Loud noise heard while driving at highway speeds, related to hood assembly. Parts for repair delayed.
When: At 73 mph
Symptoms owners cite: Loud noise while driving at high speeds
Repairs/costs cited: Sales dealer advised parts would arrive in 2 months; had not arrived after over 4 months.
Synthesized from 23 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
It's a documented issue but not catastrophic. 23 complaints have been filed. Repairs average $1,500 and most owners catch it before it causes a breakdown.
Across the 16 complaints that reported odometer mileage, most body failures cluster between 60,000 and 121,000 miles, with the median around 107,000. A quarter of owners report trouble before 60,000; a quarter make it past 121,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
Independent shops typically charge around $1,500 for body repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Yes — 1 active recall(s) cover body issues on this vehicle. Recall fixes are always free regardless of mileage or warranty status. Use the VIN decoder at the top of the page to check if your specific vehicle is affected.