2008 Hummer H2 Reliability ReportKeepScore 85/100 · top failure points · buy or avoid
Quick Facts · 2008 Hummer H2
- Outscores the 2006 Hummer H2 by 17 points — one of the stronger nearby years to consider.
- The system most likely to surface first: rear air suspension (moderate severity).
- Has 3 NHTSA recalls on record — the most notable involves the electrical system.
2008 Hummer H2: Buy or Avoid?
The 2008 Hummer H2 is a mechanically robust beast built on proven GM heavy-duty truck platforms, making it surprisingly dependable for its size and capability. While its thirst for fuel and sheer scale present unique ownership challenges, major drivetrain failures are uncommon, allowing for predictable long-term ownership if you can manage its specialized maintenance needs.
Biggest Strengths
- Extremely durable 6.2L V8 engine
- Robust 6L80 6-speed automatic transmission
- Heavy-duty body-on-frame construction
2008 Hummer H2 — Known Trouble Spots
The systems that break first on the 2008 Hummer H2. Mileage windows, repair costs, and fix-before-you-buy notes are in the full report.
Safety Recalls on the 2008 Hummer H2
3 recalls on record from NHTSA. Check your VIN atnhtsa.gov to see if the repair was performed.
ELECTRICAL SYSTEM
GM IS RECALLING 857,735 MY 2006-2008 BUICK LUCERNE; CADILLAC DTS; HUMMER H2; MY 2007-2008 CADILLAC ESCALADE, ESCALADE ESV, ESCALADE EXT; CHEVROLET AVALANCHE, SILVERADO, SUBURBAN, TAHOE; GMC ACADIA, SIERRA, YUKON, YUKON XL, SATURN OUTLOOK; AND MY 2008 BUICK ENCLAVE VEHICLES EQUIPPED WITH A HEATED WIPER WASHER FLUID SYSTEM. A SHORT CIRCUIT ON THE PRINTED CIRCUIT BOARD FOR THE WASHER FLUID HEATER MAY OVERHEAT THE CONTROL-CIRCUIT GROUND WIRE.
ELECTRICAL SYSTEM
GM IS RECALLING CERTAIN MODEL YEAR 2006-2009 BUICK, LUCERNE; CADILLAC DTS; HUMMER H2; MODEL YEAR 2008-2009 BUICK ENCLAVE; CADILLAC CTS; MODEL YEAR 2007-2009 CADILLAC ESCALADE, ESCALADE ESV, ESCALADE EXT; CHEVROLET AVALANCHE, SILVERADO, SUBURBAN, TAHOE; GMC ACADIA, SIERRA, YUKON, YUKON XL; SATURN OUTLOOK; AND MODEL YEAR 2009 CHEVROLET TRAVERSE VEHICLES EQUIPPED WITH A HEATED WASHER FLUID SYSTEM (HWFS). A RECALL WAS IMPLEMENTED IN 2008 TO ADD A FUSE TO THE CONTROL CIRCUIT HARNESS TO ADDRESS THE POTENTIAL CONSEQUENCES OF A PRINTED CIRCUIT BOARD (PCB) ELECTRICAL SHORT. HOWEVER, THERE HAVE BEEN NEW REPORTS OF THERMAL INCIDENTS ON HWFS MODULES AFTER THIS IMPROVEMENT WAS INSTALLED. THESE INCIDENTS RESULTED FROM A NEW FAILURE MODE ATTRIBUTED TO THE DEVICE'S THERMAL PROTECTION FEATURE. THE SIGNIFICANCE VARIES FROM MINOR DISTORTION TO CONSIDERABLE MELTING OF THE PLASTIC AROUND THE HWFS FLUID CHAMBER.
What breaks on the 2008 Hummer H2?
Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.
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Hummer H2 — Year-by-Year Comparison
Compare KeepScores across nearby years of the Hummer H2. Click any year for its full report.
Competing 2008s Worth a Look
Similar class, similar year range — ranked by KeepScore.
Relevant Products for Your 2008 Hummer H2
Parts and accessories matched to your 2008 Hummer H2
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Frequently Asked Questions
Just bought a 2008 Hummer H2? Keep it that way.
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