Hummer H3 Hummer H3

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Hummer H3 repairs by problem area

Engine (51%)

Transmission and Drivetrain (0%)

Brakes and Traction Control (3%)

Suspension and Steering (10%)

Electrical and Air Conditioning (33%)

Paint, Rust, Leaks, Rattles, and Trim (0%)

Other (3%)

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Chart based on 230 repairs.
See TSBs and recalls for the Hummer H3.

Hummer H3 engine repair cost distribution

$2500+ (15%)

$1000 - $2499 (12%)

$500 - $999 (13%)

$100 - $499 (38%)

< $100 (21%)

Chart based on 52 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.

2008 Hummer H3

Engine not specified

62620 mi

C $460
Check engine light stays on. 

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2008 Hummer H3 4dr SUV

242-horsepower 3.7L I5 5-speed manual AWD w/low range

105700 mi

US $1
Radiator needed to be replaced 

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2008 Hummer H3 4dr SUV

242-horsepower 3.7L I5 4-speed automatic AWD w/low range

77000 mi

US $100
Steering column intermediate shaft failure. Difficult steering off center and no on center feel. 
77000 mi Occasional engine loss of power under high steering load when just starting up after about a week of sitting. 
54000 mi

US $748
Radiator cracked at top causing leak. Vehicle also has a rough idle. Cause of Idle unknown 
28000 mi Rear Camera in mirror does not operate compass & temp stop working and cruse control not working. It comes & goes. dealer said it was because of a aftermarket starter/Alarm this was the easy way out.I then took Truck to Alarm company 
45000 mi

US $170
Engine service light replace Gas Cap.1st. according to repair manual. Then had to replace Gas tank Pressure valve at gas tank. New Battery 
54000 mi

US $30
Muffler Heat shield clamp broke & had to be replaced. 

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2008 Hummer H3 4dr SUV

190-horsepower 3.4L V6 4-speed automatic 4WD, part-time w/low range

47000 mi Total engine failure, 5.3L V8 
95000 mi Differential gasket leaking Oil Pan Gasket needed replacing, oil leak Replaced Shocks Replaced cat back exhaust 
110000 mi

US $15
small coolant leak 
120000 mi

US $25
Simple preventative maintenance- Oil Change, air filter cleaning (k&N) and MAF and throttle body cleaning (rough idle) 
130000 mi

US $285
Warped rotor, front passenger side caliper frozen 
135000 mi

US $368
Starter replacement 
149000 mi

US $250
Heat shield on catalytic converter came loose (rusted weld), put exhaust strap on it. 
149000 mi

US $800
Had to replace front wheel hub 
150000 mi

US $1250
Replaced cracked radiator 
143000 mi

US $7500
#5 bearing spun. Full engine replacement. 
158300 mi

US $1000
Drivers front axle replaced. Axle wear could not keep seal. 
63700 mi AC control module failed to blend hot and cold. Control module replaced. Buttons malfunctioning on radio. Radio replaced. 
65700 mi Right front CV boot damaged. Entire axle assembly replaced 
67000 mi Transfer case sensor error. Broken ground wire found in the harness. Harness replaced. 
75000 mi

US $1750
Torn inner and outer cv boots driver side Top of radiator leaking because of no padding on upper retaining bracket. Original OEM design and install. DTC P0121. tech found the throttle body bad. 

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2007 Hummer H3 4dr SUV

242-horsepower 3.7L I5 5-speed manual AWD w/low range

118000 mi

US $55
Water Pump leaking (bearing) 
121000 mi

US $1384
Leaking out of the output transfer case seal, and clutch slip. 
135300 mi HVAC recall. Burning smell and melted the connector that went to the resistor in the HVAC. It is now a recall for all Hummer H3s. 
67000 mi

US $2600
Cylinder number 5 misfiring, valves stuck. Entire block needed rebuilt. This is a common problem with this engine and GM is ignoring. 
66000 mi

US $180
Rear U joint failed ten days out of five year warranty, had my local shop change both U joints on shaft, one that failed is greasable, non failed is non greasable, same job would have cost $580.00 at local dealer with truck just 10 days oow 
70000 mi

US $138
OEM battery died, side walls were bulged out, plates failure 
78000 mi

US $325
Master window control driver side failed, driver window would not work and power door locks would not work 
78000 mi Parisitic discharge from battery drain.If car not driven daily, battery will die on start.Thought problem would resolve after master window switch replaced.On battery number 3, warranty replaced twice.Will try to find drain this weekend. 
78000 mi Seat trim was causing parasitic drain on battery. It was cracked and constantly pressing down on the power seat button. Realigned the plastic trim and screwed it into place, the drain on battery was resolved. 
82000 mi

US $300
Servo valve in sensor showed engine light, design change made a $100 part cost $200 with $100 installation. 
87000 mi

US $650
Driver side front wheel bearing with TPM retails over $400 for part $650 with oil change and tire rotation (5) 
88700 mi

US $300
Emergency brake cable frayed and was not releasing, put on helper spring, still would hang up, plastic handle broke off, had to replace handle and cable and cross cable 
90000 mi

US $600
Passenger side front wheel bearing with 7 year warranty 
95000 mi

US $807
Radiator needed to be replaced as well as a u joint. 
115000 mi

US $170
Leaking boot driver side 

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2007 Hummer H3 4dr SUV

242-horsepower 3.7L I5 4-speed automatic AWD w/low range

68000 mi

US $50
Engine Light On; vehicle running sluggish 
74000 mi

US $270
wiring harness for dash ac/defrost/heat fan burned out and had to be replaced. 
86000 mi

US $3899
catalytic converter bracket broken. Bolts broken off in head. replaced head and catalytic converter because bracket and converter are one piece. 
98300 mi

US $9000
replaced power steering pump replaced radiator replaced engine, $6000 
47500 mi Catalytic converter was replaced. 
60500 mi

US $240
Can position sencor. Front axle replaced. Boot ripped. 
62000 mi

US $285
Sun roof drains plugged. 
98000 mi

US $400
Ball joint 
109000 mi

US $417
Water pump replacing. No power on acceleration. Sluggish. Still dealing with it. 
109000 mi

US $777
Loud rattling. Replaced motor mounts and transmission mount. 
109000 mi Starting to have transmission issues. 
47000 mi Bad ball joint. Taken to dealer on first trip and he said there was no problem. Had Firestone do another alignment and they said once again that I had a bad ball joint! On second trip to dealer, they acknowledged problem.  
55000 mi My torque converter went out. Grinding sound while in gear and stopped. 
56000 mi Short in horn contacts at steering wheel. Dealer fixed by pulling on horn pad 
82000 mi

US $600
Overheating replaced radiator. 
70300 mi

US $600
Catastrophic water pump failure 
75700 mi

US $200
All 4 U-Joints went bad 
77000 mi

US $100
Lower radiator hose and thermostat 
23000 mi They replaced the lower steering shaft. It was a known problem on the 07's per a TSB.  
39700 mi Check engine light on. Small evap leak found. Smoke test. Dealer replaced vent solenoid and gas cap. Retested, no leaks found. 
45000 mi Fuel gauge will read completely empty after filling up, or low after fill up. Once vehicle is turned off it will show correctly. This has happened at least 10 times since March 2011. 
70000 mi Radiator went bad, and the Hummer dealer replaced it and flushed the cooling system for free.. Wright Hummer in Wexford PA is the best dealer I have seen that takes customer service serious.. They are #1. 
58300 mi

US $1290
Water pump replacement Expansion valve replacement 
67000 mi

US $1200
Radiator split apart and had to be replaced 
88620 mi Transfer case chain. 
109740 mi

R 150
Transmission oil pipe chafing against the exhaust manifold, causing oil leak. Pipe replaced. 
112840 mi

R 180
Thermostat replacement. 
115320 mi Torque Convertor circuit open and Input Turbine Speed Sensors (P0716 and P0717 Powertrain codes). 
119660 mi Front Differential gears failure. New Front Differential installed. 
36700 mi hard idle, replaced stock air intake with k/n air intake, also added g force power chip. idle now better, gas mileage up 6 to 7 m.p.g. 
48000 mi

US $780
Right side wheel brg. And hub assy. Broke.play as much as 2 " in wheel and tire when on lift. Rotate tires found problem.hummer drove as though there was nothing wrong,,wow. 
52000 mi

US $786
Cracked wheel bearing,passenger side. 
60000 mi Relay and connector burned up, safety recall no parts to repair as of yet. Repaired myself for $35.00 only 2 speeds on motor, not four. A/c works good. Waiting for parts to fix the right way. 
68000 mi

US $1100
Drivers side wheel bearing,belt,rear brakes,alignment inspection,rear shocks. 
70500 mi

US $300
Pass lock system,replaced ignition tumbler. 
99200 mi

C $300
Kept shutting down while driving, traction control failing, service stabilizers 
107440 mi Traction control failed 
111440 mi

C $850
broken water pump 
69800 mi Cylinder Head is bad. Needs to be completly replaced. Tire Pressure Monitor damaged. 
58000 mi Master cylinder failure - have to REPLACE Engine 
62000 mi

US $2850
Complete cylinder head replacement. Top engine tear-down and reassembly. Due to engine misfire fault code and rough idle concerns. Poor acceleration after long haults at stop signals. 
85000 mi

US $250
At 90000 miles Radiator's plastic top tank seams started leaking coolant and loss of cooling system pressure. 
93300 mi

US $5000
Poor engine cylinder head design at manufacturer. Engine studder and misfire at idle while in gear with foot on brake.Replaced cylinder head w/ new and problem returned after appx. 4000 miles. 
100000 mi HVAC system Heater temperature would not adjust to hothe settings. A very poor design of the sunroof water drainage system allows trapped water to enter the vehicle's interior,often leading to excessive moisture retention underneath the carpet and ultimately causing mold and stale odors inside cabin. 

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2006 Hummer H3

Engine not specified

43000 mi Started H3 and it shut down, would not start, called OnStar for diagnostic check, found ECM needed replaced as well as a new battery. Roll back picked it up and delivered to dealer. Did not cost me a dime. 
53000 mi Replace accelerator pedal sensor.  Replace TPMS sensor in right rear tire. 
58000 mi Crack in Transmission cooler, leaking fluid on ground.  Coolant also leaking. Lights out in door window controls. Knobs on AC controls worn out. Dealer repaired (Demontrand Motors), who are idiots. 

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2006 Hummer H3 4dr SUV

220-horsepower 3.5L I5 5-speed manual AWD w/low range

98000 mi

US $7200
A Rod in the engine failed. The entire engine was replaced along with a new clutch. 

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2006 Hummer H3 4dr SUV

220-horsepower 3.5L I5 4-speed automatic AWD w/low range

82000 mi Needed Heads 
14300 mi ECM replaced. 
59000 mi

US $5000
Something replaced but not rebuilt 
10000 mi Repair exterior trim. Oil change.  Headlight problem (still on going). 
10000 mi Traction control problem ...they could not suplicate in the shop...Happened again today, Feb 10th, got code from onstar this time, will make another appointment 
10000 mi Needed sensors replaced. OnStar module died. 
50000 mi Traction control can be turned on and off on vehicle. Traction control was not able to be turned off. PBM computer module defective. 
53000 mi PBM and electrical activation switch replaced for traction control system 
47000 mi

US $300
Inner tie rod needed replacement and subsequent realignment. 
67000 mi

US $70
EVAP canister failed and needed replacement... 
76300 mi

US $30
02 sensor fail. 
64500 mi

US $700
REPLACED SHOCKS, STRUTS, ADDED A FRONT SUSPENSION LIFT, CHECKED BRAKES, PERFORMED ALIGNMENT 
68000 mi

US $300
crack in top of radiator assembly. replaced the upper assembly at dealer. 
9300 mi transfer case failure. Transfer case refused to shift from hi 4 lock back to hi 4 
13640 mi

C $43
squeak from driver side door. Told that emergency brake cable needed rerouting however problem still exists. 
17980 mi Squeak continues from driver side door area driver side exterior mirror loose. Dealer replaced mirror assembly engine shuttered on initial start-up each morning. Dealer reflash of ECM. Shutter now gone 
23560 mi horn honks when vehicle first shut off and driver or passenger door opens. 
24180 mi

C $120
Horn sounds faintly when driver door is open after shutting off engine. Rear brakes grind when stopping on steep hill. Problem reoccurred after brake rotors were orginally resurfaced due to glazing. TSB on item but dealer unable to replicate? Transfer case stuck in 4 HI lock , will not release to 4 Hi unlock. Same problem a year ago. Transfer case re and re ... 
33480 mi Loud clunk from transmission/rearend when going from coasting to power. Transmission appears to do additional shift just prior to stop. 
35340 mi Check engine light on, due to emission evaporation, vent sensor malfunction. 
42160 mi Right rear passenger door light actuating switch not working. r/r switch again. 
35000 mi Engine light. Took in. Code: P300. Did leak down test. Confirmed - #3 cylinder head has a 70% leak. Per TSB - replace cylinder head. Parts ordered. Will take 3 weeks to get. 15 other H3's ahead of me for replacement on head.  
37000 mi Install Cylinder Head from February visit. 
46000 mi AC Blower Motor Resistor and wiring harness shorted out and smelled like smoke. It still worked - surprisingly. Most I've heard stop working. We smelled burning from the vents.  We smelled mold coming from the vents. We also started getting headaches. Turns out the evaporator holds condensation and turns to mold. A common problem on GM vehicles. Added Evaporator Dryer and sprayed A/C treatment in core to kill the mold. 
104700 mi

US $2300
Replaced transmission 
13000 mi 4x4 failure & stability system failure warning came on, 4x4 system lights on center console were extinguished. Dealer replaced transfer case encoder motor and performed software update. Surprisingly pleasant dealer service experience. 
25000 mi Engine blown- 80% leakdown in #3 cyl and significant leakdown in the remaining 4. Started with intermittant CEL's and progressed to very rough idle, power loss, and single digit fuel economy. 
59000 mi

US $180
Climate control unit light and rear door switch.  Driver's door hinge. 
65000 mi

US $190
Outside mirrors vibrate 
76000 mi

US $35
Right rear turn single socket replaced 
95000 mi

US $395
Ignition key could not be removed from ignition. Replaced two (2) sensors, did not correct problem. Disconnected brake switch. 
103300 mi

US $550
Replaced blower motor resistor and plug module. 
122700 mi

US $2100
Rebuilt the transmission. 
133000 mi

US $2000
Both front wheel bearings, right front axle, front brakes, both rotors and brake calipers. 
66320 mi

C $350
replace spark plug coil 
68200 mi

C $200
Steering fluid leak 
65000 mi Sunroof drain tube was clogged on front passenger side which was causing water to come into the interior wetting the headliner 
74000 mi

US $250
Check engine light was on and the thermostat was replaced which fixed the problem. 
91700 mi

US $483
Radiator was leaking at the top. Replaced radiator. 
95000 mi

US $50
Hard to start in cold. Replaced spark plugs. 
74000 mi

US $1000
Power steering belt replaced; worn out 
139700 mi

US $307
Slighty overheating, thought it was the thermostat so I had it replaced at a local shop, was not thermostat, the thermostat guage went out and had to be readjusted for $100 at dealership. 
152000 mi

US $976
Started driving about a mile down the road, went dead, would not fully start back up. Would only start up for about 2 seconds, then would do a horrible idle and go dead. Ended up towing it and replacing the fuel pump. 
78700 mi

US $125
Leaky oil seal front transaxle. 
89300 mi

US $2000
Fuel Tank leaked had to replace it. Upstream Oxygen Sensor bad, had that replaced. Fuel pump rusted, connectors broke and had to replace pump and a fuel hose. 
95000 mi

US $15
Radiator Cap Leak 
80000 mi engine would turn over but not start--fuel pump not operating keyless entry would not lock/unlock doors--drivers side window inoperative 
72000 mi

US $140
check engine light on, OBD II code indicated a bad evap solenoid, also got messages about fuel cap being loose. Replaced the evap solenoid, issue fixed. 
46000 mi Air condition control knob had a burned out LED. three button control panel replaced at no charge. Under warrenty 
93000 mi Replaced thermostat. 
99000 mi

US $40
Error code P00014 timing error. Replaced crankshsft solenoid. Xsr would not crank. Checked battery and foud it was unable to charge. 
105000 mi

US $35
A/C stop blowing cold. Replaced blower and recharge A/C 

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2006 Hummer H3 4-door

5-cylinder automatic 4WD

7000 mi Needs new head in cylinder one 
9000 mi Needs new head in cylinder one. Repair period started in May and finished over a week later in June. 
79000 mi

US $400
Dreaded cylinder head problem found mainly in the 06 H3. 

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2006 Hummer H3 4-door

4-cylinder automatic AWD

3000 mi Vehicle stability failure. Please service message came on and I was unable to switch from 4wd drive. These buttons did not work. Mechanic said it was the encoder motor. Replaced broken center console clip. Email 080907. 
12000 mi Air bag light came on. Took in...air bag is working properly on passenger side..just problem with indicator light. Ordered new part...waiting to get call to bring in. 
13000 mi Air bag light for passenger side was not working. Ordered part...then wrong part came in...so finally got appt, free loaner Hummer and then it was fixed. 

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2006 Hummer H3 2-door

Engine not specified

21000 mi Bad cylinder head. Ordered replacement. 

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Hummer H3 Engine Problems

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