2007 HUMMER H3 Engine Problems

The contact owns a 2007 Hummer H3. The contact stated while driving at 50 mph, the vehicle started to overheat and stalled. The contact stated the temperature and the check engine warning light were illuminated. The vehicle was then towed to a local dealer where it has yet to be diagnosed due to the battery needing to be replaced. The vehicle was not repaired. The contact had the vehicle serviced under NHTSA campaign number: 15V421000 (Visibility) prior to experiencing the failure. The manufacturer had not been informed of the failure. The failure mileage was approximately 160,000.

Mileage: 160,000

ON 3/13/2020 MY WIFE WAS DRIVING OUR 2007 HUMMER H3 WHEN THE ENGINE COMPARTMENT AND DASH AREA CAUGHT ON FIRE. THE BLOWER MOTOR CONNECTOR MODULE HAD BEEN REPLACED RECENTLY AS PART OF A SAFETY RECALL. THE VEHICLE WAS IN MOTION AND SHE HAD JUST MADE A LEFT TURN. ALTHOUGH THE PART HAD BEEN REPLACED, I STILL BELIEVE THAT THIS RECALL ISSUE WAS THE CAUSE OF SAID FIRE. THE FIRE DEPARTMENT CALLED IT AN ELECTRICAL ISSUE. THERE WAS NO WARNING AT ALL. THIS WAS TRAUMATIC FOR MY WIFE SHE HAD TO JUMP OUT OF THE VEHICLE AND HAD A MISCARRIAGE.

Mileage: 110,000

VEHICLE MISFIRES FREQUENTLY. ENGINE WILL NEARLY STALL AT IDLE DUE TO MISFIRES AND SHAKE THE WHOLE VEHICLE. LACK OF POWER AND EFFICIENCY. AND JUDDERING WHILE ACCELERATING. IT IS KNOWN TO GM AND MANY PEOPLE HAVE HAD TO RESORT TO CYLINDER HEAD REPLACEMENTS COSTING HUNDREDS AT A MINIMUM.

Mileage: 95,000

OIL LIGHT COMES ON WHEN IDLE. TRUCK LOSES PRESSURE. NO DEALERSHIP SOLUTION.

Mileage: 179,000

TL* THE CONTACT OWNS A 2007 HUMMER H3. WHILE DRIVING 35 MPH, THE ENGINE OIL INDICATOR ILLUMINATED AND AN ODOR EMITTED FROM THE VEHICLE. THE CONTACT REPLACED THE OIL AND TOOK THE VEHICLE TO AN INDEPENDENT MECHANIC WHERE IT WAS DISCOVERED THAT THERE WAS A SMALL HOLE IN THE MANIFOLD, WHICH BURNED OUT THE OIL. THE CONTACT PAID OUT OF POCKET TO HAVE THE VEHICLE REPAIRED. THE MANUFACTURER WAS NOTIFIED AND FILED A CLAIM. THE CONTACT WAS REFERRED TO NHTSA TO FILE A COMPLAINT. THE DEALER WAS NOT CONTACTED. THE FAILURE MILEAGE WAS 120,000.

Mileage: 120,000

DRIVING DOWN THE ROAD AND IT STOP AND IT WOULD NOT START ENGINE LOCK UP

Mileage: 160,000

TL* THE CONTACT OWNS A 2007 HUMMER H3. THE CONTACT STATED THAT THE ENGINE FAILED TO START. THE CONTACT HAD TO SIT IN THE VEHICLE AND WAIT A WHILE BEFORE ATTEMPTING TO START THE VEHICLE. THE FAILURE OCCURRED AT ANY GIVEN MOMENT AND WAS BECOMING MORE FREQUENT. IN ADDITION, THE PASS LOCK WARNING INDICATOR ILLUMINATED ON THE INSTRUMENT PANEL. THE DEALER WAS NOT CONTACTED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE CONTACT REPLACED THE MANIFOLD AND WAS REIMBURSED. THE FAILURE MILEAGE WAS 84,822. THE VIN WAS UNKNOWN.

Mileage: 84,822

HUMMER WILL NOT START, ENGINE TURNS OVER NORMALLY, BUT WILL NOT START. WAIT EXACTLY 10 MINUTES AND IT STARTS UP FINE. CAN HAPPEN ANY TIME, AT THE GAS STATION, FIRST THING IN THE MORNING. LEARNED THAT IF THE SECURITY LIGHT ON THE DASH BLINKS WHEN THE KEY IS TURNED ON, THE VEHICLE WILL NOT START. IF LIGHT STAYS ON, THE VEHICLE STARTS. HAVE WATCHED FOR THIS AT EVERY START UP, CAN NOW TELL WHEN THE VEHICLE WON'T START. THIS IS A MAJOR PROBLEM WITH GM VEHICLES WITH PASS LOCK SINCE THE LATE 1990S, GM NEED TO TAKE RESPONSIBILITY FOR THIS PROBLEM NOW!!!!!!!!!!

Mileage: 123,000

IF RETURNING SOON AFTER SHUT OFF ; IT WILL NOT RESTART. HAVE TO WAIT AWHILE FOR IT TO RESTART. IT'S WEIRD BECAUSE THERE ARE NO OTHER PROBLEMS. IT HAS BEEN DOING THIS FOR AWHILE NOW.

Mileage: 97,000

SIR/MA'AM, I AM WRITING TO COMPLAIN ABOUT THE 2007 HUMMER H3 SECURITY SYSTEM NOT ALLOWING THE VEHICLE TO START UNDER CERTAIN CONDITIONS. I MAINTAIN MY VEHICLE TO HIGH STANDARDS AND OVER THE LAST 8 MONTHS HAVE HAD ISSUES STARTING MY HUMMER. WHEN THE HUMMER DOES NOT START, YOU MUST WAIT 10-15 MINUTES TO EVEN ATTEMPT TO RESTART. THE VEHICLE WILL TURN OVER, BUT NO FUEL IS SENT TO THE ENGINE TO START. IF IT DOESN'T START AGAIN, YOU MUST WAIT ANOTHER 10-15 MINUTES. THE LATTER HAS HAPPENED TO ME 5 OR 6 TIMES IN JUST THE LAST 2 MONTHS. THERE HAVE BEEN NUMEROUS COMPLAINTS TO GM ABOUT THIS EXACT ISSUE, AND HAS FALLEN ON DEAF EARS. MANY VEHICLE FORUM USERS COMPLAIN OF THE EXACT ISSUE AS WELL, WITH ZERO ASSISTANCE FROM GM AS SEEN HERE: HTTPS://WWW.CARGURUS.COM/CARS/DISCUSSION-C8039_DS531571 I AM CONCERNED THAT IF THE SPORADIC SECURITY LOCKDOWN (PASSLOCK) OCCURS WHILE DRIVING, FUEL IS CUT OFF FROM THE RUNNING ENGINE, SPEED/STEERING/BRAKING WILL BE MINIMIZED, AND THE POSSIBILITY OF A CRASH IS INCREASED EXPONENTIALLY. PLEASE ADVISE GM THERE NEEDS TO BE A FIX FOR THIS AND ENSURE THEY COMPLY! THANK YOU FOR YOUR TIME. I BELIEVE MY PHOTOS OF THE BLOWER MOTOR FAN RESISTOR BEING BURNT HELPED GET GM ISSUE A RECALL, AND I HOPE THIS WILL URGE THEM TO FIX AS WELL

Mileage: 105,000

VEHICLE INSTRUMENT PANEL WARNING SHOWS: SERVICE TRACTION CONTROL REDUCED POWER STABILITY SYSTEM FAILED VEHICLE MISFIRES WHEN THIS HAPPENS SOMETIMES VEHICLE SHUTS OFF IN THE MIDDLE OF THE ROAD WHEN TRYING TO RESTART IT DOES NOT RESTART SOMETIMES AFTER THIS

Mileage: 180,000

2007 HUMMER H3. CONSUMER WRITES SEEKING REIMBURSEMENT FOR REPAIRS DONE PRIOR TO SAFETY RECALL BEING ISSUED. *LD *JS

TL* THE CONTACT OWNS A 2007 HUMMER H3. WHILE DRIVING VARIOUS SPEEDS AND APPROACHING A STOP, THE VEHICLE OVERHEATED. THE CHECK ENGINE WARNING INDICATOR ILLUMINATED. THE CONTACT COASTED TO THE SIDE OF THE ROAD, POWERED OFF THE VEHICLE, AND WAITED FOR A FEW MINUTES TO RESTART IT AND RESUME DRIVING. THE VEHICLE WAS TAKEN TO STINGRAY CHEVROLET BARTOW (1475 W MAIN ST, BARTOW, FL 33830, (863) 800-9999) WHERE IT WAS DIAGNOSED THAT THE SPEED SENSOR FAILED AND NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE VEHICLE WAS LATER TAKEN TO AN INDEPENDENT MECHANIC WHERE THE THERMOSTAT WAS REPLACED; HOWEVER, THE FAILURE RECURRED. THE MANUFACTURER WAS NOT CONTACTED. THE APPROXIMATE FAILURE MILEAGE WAS 136,000.

Mileage: 136,000

ABOUT 2 YEARS AFTER I BOUGTH CAR FROM DEALER ,THE CAR CRANKS BUT WONT START YOU HAVE TO WAIT 20 MINUTES AND IT STARTS TODAY IT LEFT ME STRANDED OVER 60 MILES AWAY ,IT HAS BEING DOING THIS EVERY FEW MONTHS ,I SAW A FORUM WITH HUNDREDS OF PEOPLE HAVING SAME PROBLEM AND DEALER SAYS IT DOESENT FIND ANYTHING THAT'S WHAT I WAS TOLD TWO TIMES AT DEALER ,FROM THE FORUM IT SEEMS TO BE A FAULTY PASSLOCK SECURITY PROBLEM OR A FAULTY EGNITION SWITCH ON SEVERAL YEARS OF HUMMERS ,GM NEEDS TO RECALL THIS BECAUSE IS CAUSING LOTS OF EXPENSES TO A LOT OF PEOPLE INCLUDING ME

Mileage: 36,000

EVERYTHING FROM: ELECTRICAL, AIR CONDITION, STABILITRACK SYSTEM, WHICH COST ME OVER $600.00 STILL NOT WORKING PROPERLY. LEAKINGSUN ROOF CENSORS, I WAS MADE TO PAY FOR THAT STILL DONT WORK. I PAID OVER $8,000.00, OR MORE. WHEN EVER I BROUGHT MY VECHICLE IN, I WAS FORCED TO FOR SOMETHING ELSE, MY VECHILE ONLY HAD ABOUT 22,000.00 MILES. I WAS TAKING IT TO GMC/VERA CADILLAC 300 PEMBROKE PINES, FL 33025, PH:(954)362-9465, SERVICE MANAGER MR.GUSTAVO, EDWIN MONTOYA. I HAVE OVER 50 PAGES DOCUMENTS ABOUT FAKE REPAIRS, MY VECHICLE IS WROST OFF NOW THAN BEFORE. IT ALSO HAS SAFTY ISSUES, MOLD/MEDW, AC OVERHEATING, AIRBAG NOT WORKING, ETC. I AM AFRAID FOR MY SAFTY.

Mileage: 22,000

TL* THE CONTACT OWNS A 2007 HUMMER H3. WHILE THE VEHICLE WAS PARKED, THE KEY BECAME STUCK IN THE IGNITION AND COULD NOT BE REMOVED. THE VEHICLE WAS TOWED TO A DEALER WHERE IT WAS DIAGNOSED THAT THE IGNITION CYLINDER FAILED AND NEEDED TO BE REPLACED. THE DEALER MADE MANY ATTEMPTS TO REPAIR THE VEHICLE, BUT THE REMEDY FAILED. IN ADDITION, VARIOUS ELECTRICAL FUNCTIONS FAILED AND A BURNING ODOR WAS NOTICED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 7,000.

Mileage: 7,000

MY HUMMER STALLS AND DIES AT VARIOUS TIMES. THIS IS DANGEROUS AND KNOW ONE CAN SEEM TO TELL ME WHY IT DIES WHILE DRIVING. I TAKE GREAT CARE OF MY TRUCK AND ME I HAVE METAL SHAVINGS IN OIL. DYING IN AN INTERSECTION WITH CHILDREN IS DANGEROUS. THIS NEEDS TO BE ADDRESSED.

Mileage: 140,000

THE VEHICLE JUST LOST POWER AND ALMOST LOST IGNITION WHILE DRIVING 50 MILES AN HOUR. DIAGNOSTIC CODE STATE, MISFIRE IN CYLINDER ONE. VALVE SPRINGS ( ROCKER ARM) ARE BREAKING PREMATURELY CAUSING A LEAKING VALVE PROBLEM. MECHANIC ALSO NOTICED OTHER SPRINGS WERE FATIQUED CAUSING A LOOSER THAN NORMAL SEATING. GM SERVICE MANAGER MENTION A SPRING PROBLEM ON 2006 2007 RENDEVOUS. ONE OF THE LARGEST COMPLAINTS WITH THE HUMMER 3 IS THIS LEAKY VALVE SYNDROM WHICH THE DEALERS KNOW ABOUT. SOME OCCURING WITH THE VEHICLE HAVING ONLY 30,000 PLUS MILES.

Mileage: 103,306

BOUGHT 2007 HUMMER H3 AT THE END OF FEBRUARY AS IS IN CHICAGO AT NET MOTOR CARS ADDISON ILLINOIS FOR 14000 AND DROVE IT HOME 150 MILES AWAY AND WAS TOLD BY DEALER TO TAKE IT IN TO GM DEALER AND HAVE MY ABS SYSTEM FLASHED BY THEM AND ALL WARNING LIGHTS WILL GO AWAY GM POAGES HAD MY CAR FOR TWO WEEKS COST 560 DOLLARS TO REPAIR THEN A DAY LATER CHECK ENGINE LIGHT CAME ON TOOK IT TO A SHOP AND THEY SAID IF GM HAD IT CHECKING FOR CODES THEY SHOULD HAVE SEEN THE WIRE IF THEY HAD IT ON MACHINE LOOKING FOR CODES BECAUSE THAT WIRE HAD TO BE IN PLACE TO READ THE CODES SO HE TOLD ME TO TAKE IT BACK TO THEM TO REPAIR IT FOR FREE. I TOLD HIM NO FOR HIM TO GO AHEAD AND FIX IT FOR A HUNDRED BECAUSE IF I TAKE IT BACK TO GM POAGE WHAT OTHER TRICK DO THEY HAVE UP THERE SLEVE IF THEY FIX IT. SO HE DID AND IT SHOWED MULTIPLE MISFIRES AND A STEADY MISFIRE ON CYLINDER 5 TOLD THEM TO FIX IT COSTING 1929.90 CAR HAS BEEN IN TWO DIFFERENT SHOPS TWO WEEKS AT THE GM DEALER POAGE AUTO MALL IN DECATUR ILLINOIS VERY DISAPPOINTED ON THERE BEHAVIOR OF BEING SHADY IF THEY HAD IT HOOKED UP FOR TWO WEEKS ON A CODE READER WHY DIDN'T THEY SEE MISFIRES. WILL NEVER DO BUSINESS WITH THEM EVER THEY LOST A 2000 DOLLAR JOB AND MY FUTURE SERVICES LIKE CHANGING OIL ECT. THIS IS BAD BUSINESS. GETTING MY CAR THIS WEEK FROM SOUTH SHORES AUDO WHICH WILL HAVE MY BUSINESS IN THE FUTURE. GM OR AT LEAST DECATUR POAGES AUTO MALL SHOULD BE INVESTIGATED BY TRYING TO SCREW OVER A WOMAN AND WHO ELSE THEY CAN THEY PULLED WIRE SO I WOULD BRING BACK TO GET RADIO REPLACED AS I WAS BECAUSE I ONLY HAD SO MUCH MONEY TO REPLACE I THINK WHEN I WAS GOING TO BRING BACK IN FOR A REFURBISHED TRADE IN RADIO THEY WERE GOING TO INSTALL IT THEN HOOK WIRE BACK UP AND SURPRISE ME WITH THE MISFIRES AND A PROBABLY 3000 DOLLAR JOB. ALSO SOUTH SHORES AUTO TOLD ME NOTHING WRONG WITH RADIO

Mileage: 110,488

FIRST THE ENTIRE COMPUTER SYSTEM STOPPED WORKING. HAD TO REPLACE THR PCM. THEN MY BLOWER STARTED THROWING HOT AIR WHEN ON COLD. HAD TO INSTALL SEPARATE TO RESOLVE THAT ISSUE. HAD TO RE-BUILD THE TRANSMISSION TWICE DUE TO LEAK OF COOLANT INTO THE TRANSMISSION. THIS TRUCK HAS BEEN A NIGHTMARE SO FAR.

TL* THE CONTACT OWNS A 2007 HUMMER H3. THE CONTACT STATED THAT THE ENGINE WAS DEFECTIVE. THE ENGINE FAILED TO START NUMEROUS TIMES INTERMITTENTLY. THE ENGINE STARTED AFTER WAITING TEN MINUTES AND THE ANTI-THEFT LIGHT ILLUMINATED. THE VEHICLE WAS NOT DIAGNOSED NOR REPAIRED. THE MANUFACTURER WAS NOTIFIED. THE VIN WAS UNKNOWN. THE FAILURE MILEAGE WAS 74,000. UPDATED 04/22/16*LJ *TR

Mileage: 74,000

THE RADIATOR HAS A CRACK IN IT WHICH IS A VERY COMMON ISSUE...NEEDS TO BE RECALLED. MY H3 WAS IDLING ROUGH AND WOULD SHUT OFF. HAD TO REPLACE THROTTLE BODY AND SOLENOID. THE ANTI-THEFT ACTS UP AND THE H3 WON'T START HAVE TO WAIT 10 MINUTES. THE AC BLOWER AND CONNECTOR BURNT PAID FOR IT TO GET FIXED THEN THE RECALL COMES OUT 7 DAYS LATER....STILL HAVEN'T BEEN REFUNDED FOR THAT. I HAVE ALL THE ISSUES ON MY 2007 H3 THAT SHOULD ALL BE RECALLED AND FIXED AT GM EXPENSE. SUNROOF DRAINS GET CLOGGED ALL THE TIME AND HAVE WATER LEAK ONTO THE FLOOR WHICH MAKES THE ABS LIGHT TRIGGER ON AND OFF. ISSUE AFTER ISSUE WHICH GM DOESN'T TAKE ANY RESPONSIBILITY FOR. IT LOOKS LIKE IT'S TIME TO SELL THE HUMMER H3!!

Mileage: 120,000

REBUILT TRANSMISSION TWICE CLEANED THROTTLE BODY REPLACED EXHAUST MANIFOLD TWO O2 SENSORS REPLACED THE RADIATOR THE HEATER CORE A FUEL PUMP RELAY AND THIS ENGINE LIGHT STILL WILL NOT TURN OFF IT SAYS TORQUE CONVERTER CLUTCH SOLENOID I'M DISGUSTED ALREADY GM FIX UR [XXX]. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR

Mileage: 94,000

TAKATA RECALL MISS FIRE IGNITION COIL THERES WAY TO MANY COMPLAINTS ABOUT THIS IF THERES NOTHING DONE ABOUT THIS ITS THE LAST TIME IM BUYING A GM AUTOMOTIVE TO GET IT FIX COST ALMOST $3000 DOLLARS THATS NOT GOOD FOR YOUR BUSINESS

TL* THE CONTACT OWNS A 2007 HUMMER H3. THE CONTACT STATED THAT THE CHECK ENGINE WARNING LIGHT ILLUMINATED. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBER: 15V421000 (VISIBILITY) AND STATED THAT THE PARTS NEEDED FOR THE REPAIR WERE NOT AVAILABLE. THE CONTACT STATED THAT THE MANUFACTURER EXCEEDED A REASONABLE AMOUNT OF TIME TO THE RECALL REPAIR. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 140.000.

Mileage: 140,000

WHILE DRIVING AT 65 MILES PER HOUR THE VEHICLE DASH LIT UP ALL SERVICE LIGHTS THE VEHICLE WENT INTO REDUCED POWER MODE NOT ALLOWING THE VEHICLE TO EXCEED 40 MPH AND ABS SENSORS CAME ON STAYING TRACTION FAIL, ABS FAIL, BEGAN TO STUTTER AND STALL. TOOK TO SHOP. VEHICLE RUNNING CODES FOR SPARK PLUGS, REPLACED SPARK PLUGS. FEW WEEKS LATER DID IT AGAIN, THIS TIME SAYING THROTTLE BODY. REPLACED IT, A MONTH LATER DID IT AGAIN, EACH TIME IN MAJOR TRAFFIC HAVING TO PULL OFF ROADWAY TO AVOID AN ACCIDENT. THIS TIME SAYS MISFIRING, THROTTLE BODY, ABS,TPMS, THERMOSTAT, ETC. TAKE IT TO HAVE COMPRESSION TEST RUN AND SYSTEM SAYS CYLINDER FAILURE. DO RESEARCH ON ISSUE AND FIND THAT THERE ARE HUNDREDS OF COMPLAINTS ABOUT THIS ONLINE HAVING CAUSED ACCIDENTS AND THOUSAND OF DOLLARS SPENT BY CONSUMERS AFTER HAVING ACCIDENTS BUT NO KNOWN FATALITY SO GM WILL NO RECALL OR HONOR THE ISSUE REPAIRS. ALMOST ALL OF THEM HAPPENING AT 100K MILES. *TR

Mileage: 100,000

VEHICLE WOULD NOT START CALLED DEALERSHIP WHERE CAR WAS PURCHASED - REPLACED IGNITION SWITCH AFTER DIAGNOSIS. SINCE THEN HAVE HAD REPEATED EPISODES OF VEHICLE IGNITION/ELECTRICAL JUST SHUTTING COMPLETELY DOWN ON DIFFERENT OCCASIONS. I COULD BE SITTING OR APPROACHING A STOP LIGHT VEHICLE SHUTS DOWN UPON TAKING OFF OR IDLING DOWN, VEHICLE ALSO SHUTS DOWN WHEN MAKING TURNS AS WELL. IT OCCURS SO INFREQUENTLY AND HAS NO PATTERN BUT IT IS INDEED A SAFETY CONCERN BECAUSE I HAVE TO PUT ON THE FLASHERS AND TAKE TIME TO RESTART THE ENGINE ALL BEFORE SOMEONE RUNS INTO ME. *TR

Mileage: 65,000

ENGINE CHECK LIGHT CAME ON FOR VERY SHORT PERIOD OF TIME THEN WENT OUT. ABOUT A WEEK LATER IT CAME ON AGAIN. WENT TO CHEVY DEALER WHO RAN A QUICK CODE CHECK WHICH INDICATED THE NUMBER 5 CYLINDER WAS MISFIRING. THE CHEVY DEALER INDICATED THE ENGINE/POWER TRAIN WARRRANTY HAD EXPIRED AND THE PROBLEM COULD BE FROM INJECTORS, PLUGS, COIL AND VALVES. INITIAL COMPUTER CHECK WOULD COST $135. VEHICLE IS SITTING IN MY GARAGE AWAITING MONEY TO GET IT CHECKED.

Mileage: 66,790

TL* THE CONTACT OWNS A 2007 HUMMER H3. WHILE DRIVING APPROXIMATELY 40 MPH, THE VEHICLE SHOOK VIOLENTLY AND STALLED WITHOUT WARNING. THE VEHICLE COULD NOT BE RESTARTED. THE VEHICLE WAS TOWED TO THE DEALER WHERE IT WAS DIAGNOSED THAT THE ENGINE OR THE CYLINDER NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 56,800. UPDATED 03/10/15*LJ UPDATED 6/17/2015 *JS

Mileage: 56,800

JUST HAD MY HUMMER IN 2 WEEKS AGO AT THE GM DEALERSHIP TO HAVE THE IGNITION SWITCH REPLACED. HAD BEEN DEALING WITH IT STRANDING ME AND MY KIDS FOR 10 MINUTE PERIODS LONG ENOUGH. ( SOMETIMES LONGER) WHILE IT WAS IN THERE WE ALSO HAD TO GET THE RADIATOR REPLACED DUE TO IT BEING CRACKED. NOW 2 WEEKS LATER MY CHECK ENGINE LIGHT AND TRACTION LIGHT HAVE COME ON. THE TRACTION LIGHT SAYING SERVICE SAB SYSTEM. AFTER READING ALL THE HUMMER PROBLEMS I CAN NOT BELIEVE THAT THERE WAS NOT A RECALL ON BOTH THE IGNITION SWITCH AND RADIATOR. THE IGNITION SWITCH BEING FAULTY PUT ME AND MY KIDS IN SITUATIONS IN PLACES FOR LONG PERIODS OF TIME THAT WERE NOT SAFE AND AT TIMES WE WERE VERY COLD SINCE WE CAN HAVE BELOW ZERO WEATHER IN COLORADO. THE IGNITION NOT RECOGNIZING THE KEY CAUSING THE ANTI THEFT SYSTEM TO ACTIVATE IS RECALL ISSUE AND GM YOU SHOULD BE TAKING RESPONSIBILITY FOR THIS!! *TR

Mileage: 60,000

MY VEHICLE HAS A CRACKED RADIATOR AND ACCORDING TO OTHER HUMMER OWNERS THIS IS A COMMON DEFECT THAT HAPPENS TO THESE VEHICLES. HIS OVER HEATING CUASED ME TO PULL OVER ON A BUSY HIGHWAY WERE I COULD OF BEEN HIT AND KILLED, TOTAL FAILER OF VEHICLE ELECTRONICS, GMC DOES NOT WANT TO WORK ON THE VEHICLE THAT IS NOT UNDER WARRANTY, BECAUSE OF THE MANY PROBLEMS WTH THIS VEHICLE. THIS CRACK IS WERE IT IS WEARING NEAR THE MOTOR. *TR

Mileage: 57,534

I PURCHASED THIS VEHICLE, NEW IN JULY 2007. SINCE THAT TIME I HAVE METICULOUSLY MAINTAINED THE VEHICLE. ON 7/28/14, PARKED AT HOME. GOT OUT AND SMELLED COOLANT VAPORIZING (DISTINCT SMELL). I AM A RETIRED MASTER MECHANIC, WITH 44 YEARS EXPERIENCE (CURRENTLY AGE 60). I EXAMINED THE RADIATOR, RINSED IT OFF AND DRIED IT, PRESSURIZED THE SYSTEM TO DISCOVER A HAIRLINE CRACK IN THE UPPER, PLASTIC TANK OF THE RADIATOR IN AN AREA WITH NO IMPINGEMENT OF OTHER COMPONENTS, NO TRAUMA, AND NO ROUGH USE, EVER. I CAUGHT IT AT THE VERY FIRST MANIFESTATION, SOLELY BY THE SMELL. EXAMINING THE VEHICLE CLOSELY TO DISCOVER WHILE MY RADIATOR HAD ONLY THIS HAIRLINE CRACK IN A LOCATION OF NO-STRESS AND NO IMPINGEMENT OF OTHER COMPONENTS. RESEARCH FURTHER TO DISCOVER THIS IS A VERY COMMON PROBLEM WITH THE H3, FROM 2006, 2007, 2008 AND 2009 MODELS ALL IN THE 50,000 TO 100,000 MILE READINGS. THE REPLACEMENT OF THE RADIATOR AT LOCAL GM DEALER, WITH COOLING SYSTEM SERVICE WAS EXTREMELY EXPENSIVE AS THE REPLACEMENT OF THE RADIATOR REQUIRES THE RECEIVER DRYER OF THE AIR CONDITIONING SYSTEM TO BE DISCONNECTED WHICH REQUIRES DISCHARGE AND RECHARGE OF REFRIGERANT R124A. I SAVED THE DEFECTIVE RADIATOR. THERE IS NO OTHER WEAR NOR DAMAGE. THE INTERNAL CORES WERE CLEAR AND CLEAN LIKE NEW. NO OBSTRUCTIONS, DIRT NOR WEAR. IN OTHER WORDS I WAS FORCED TO REPLACE A PERFECTLY GOOD RADIATOR FOR 1 HAIRLINE CRACK ON THE UPPER PLASTIC TANK. THIS REPAIR, INCLUDING ALL COURTESY DISCOUNTS FROM THE SELLING DEALERSHIP, AS I HAD BEEN AN AUTO REPAIR SHOP OWNER AND LOYAL CUSTOMER FOR 30 YEARS OF MY LIFE, COST ME $966.57. NHTSA SHOULD DO A FORMAL DEFECT INVESTIGATION ON ALL THE HUMMER H3 MODELS AND ANY / ALL OTHER GM LIKE-TYPE VEHICLES WITH THE PLASTIC TANK RADIATORS WHICH COULD CAUSE A SERIOUS ACCIDENT OR DEATH. *TR

Mileage: 73,550

RADIATOR HAD SMALL LEAK, HAS SINCE INCREASED OVER LAST 3 YEARS. NOT COVERED UNDER WARRANTY AND EVERY H3 OWNER KNOWS THIS IS A DEFECT THAT NEEDS TO BE RECALLED. *TR

Mileage: 55,000

LESS THAN 1 YEAR AGO, I HAD THE RADIATOR AND TRANSMISSION REPLACED IN MY VEHICLE. I HAVE RECENTLY NOTICED THE SMELL OF ANTIFREEZE COMING FROM MY HOOD AFTER LONG TRIPS. THE RADIATOR THAT WAS INSTALLED IN MY VEHICLE 10 MONTHS AND 8K MILES AGO HAS DEVELOPED A CRACK IN THE TOP TANK. THERE IS DRIED COOLANT SPRAY ACROSS THE TOP OF MY ENGINE AND A CRACK FORMING RIGHT BEHIND THE LIP OF THE FRAME OF THE TRUCK. *JS

Mileage: 85,000

MY RADIATOR TANK CRACKED RIGHT ACROSS THE TOP COMPROMISING MY COOLING SYSTEM. THIS TURNED INTO A BIGGER PROBLEM AS THE TRANSMISSION OIL COOLER WAS NOT OPERATING CORRECTLY AND EVENTUALLY DESTROYING MY TRANSMISSION. I HAD TO SPEND OVER $2K TO HAVE A REFURBISHED TRANNY AND NEW RADIATOR INSTALLED. *JS

Mileage: 70,000

44,000 MILES CHECK ENGINE LIGHT CAME ON . TOOK TO DEALER I HAD A CYLINDER 5 MISFIRE CODE P300 COUPLE THOUSAND MILES LATER MY TRUCK WAS STILL SHOWING MULTIPLE MISFIRES. I HAD TO REPLACE THE RADIATOR BECAUSE IT WAS LEAKING AND THERMOSTAT AT 46,000, APRIL 2011 AT 65,000MILES MY TRANSMISSION WENT OUT COMPLETELY AND HAD TO BE REPLACED JULY 2012 AIR STOP WORKING TOOK TO DEALER THEY SAID I HAD TO REPLACE THE FAN BLOWER MOTOR RESISTOR. RESEARCHED AND FOUNDED THIS WAS A KNOWN PROBLEM FOR HUMMERS THE MOTOR GETS TO HOT AND MELT CAUSING THE FAN BLOWER TO GO OUT . SEVERAL MONTHS LATER CHECK ENGINE LIGHT CAME ON SEVERAL MORE TIMES TOOK TO THE DEALER SAID THEY COULDN'T FIND PROBLEM AND CLEARED CODE MY CHECK ENGINE LIGHT CAME ON AGAIN SO I TOOK TO AUTO ZONE DIAGNOSTIC SHOWED CYLINDER 5 COIL MULTIPLE MISFIRE SO I HAD SPARK PLUGS CHANGED ALONE WITH ALL FIVE IGNITION COILS. COUPLE MONTHS LATER CHECK ENGINE LIGHT CAME ON AGAIN TOOK IT TO DEALER DIAGNOSTIC TEST REVEAL CODE PO 300 AGAIN AND COUPLE OTHER CODES DEALER SAID MY TRUCK HAD AN EMISSION LEAK. MULTIPLE MISFIRE ,CYLINDER 5 AND A SMALL CRACK IN THE HEAD. I DIDN'T UNDERSTAND HOW THAT MAGICALLY HAPPEN. I PAID THE DEALER TO FIX THIS ON MARCH 2014. A WEEK LATER CHECK ENGINE LIGHT CAME ON AGAIN . TOOK TO DEALER DIAGNOSTIC SHOWED EMISSION LEAK APPARENTLY THEY DIDN'T FIX IT THE FIRST TIME. WEEK LATER CHECK ENGINE LIGHT CAME ON AGAIN TOOK TO DEALER AND DIAGNOSTIC TEST REVEAL TORQUE CONVERTER CLUTCH SOLENOID .DEALER SAID I NEED TRANSMISSION REPLACED. I'M CONFUSED AT THIS POINT THE DEALER PUT A NEWTRANSMISSION 3 YEARS PRIOR .MY TRUCK HAS NEVER BEEN OVER THE ROAD. I ONLY DRIVE LOCALLY. NOW AT 103,000 MILES THE DEALER IS SAYING I NEED ANOTHER TRANSMISSION . SOMETHING IS NOT RIGHT HERE. AFTER RESEARCHING I'VE FOUND THOUSAND OF HUMMER OWNERS EXPERIENCING THE SAME PROBLEMS I'VE EXPERIENCED. SOMETHING NEEDS TO BE DONE TO PROTECT CONSUMERS. *TR

Mileage: 44,000

I OWN A 2007 HUMMER H3 WITH 66000 MILES ON IT. IT HAS BEEN DIAGNOSED AS HAVING A BAD HEAD DUE TO THE USE OF SOFT METALS FOR THE CYLINDER SLEEVE. DUE TO THIS, THERE IS SUDDEN REDUCED POWER. THE COST OF THIS FIX IS ABOUT $4500.00. MY TRUCK BEGAN WITH A CHECK ENGINE LIGHT ON (AUTOZONE) SAID IT WAS A MISFIRE ON CYLINDER #5. I WENT TO THE LOCAL DEALER AND ASKED THEM TO LOOK AT THE TRUCK. THEY DIAGNOSED IT AS A #5 CYLINDER HAVING THE COMPRESSION LEAK OF 90%. IN LOOKING ON THE INTERNET (AT HUMMER FORUMS), I OBSERVED THAT QUITE A FEW HUMMER H3 OWNERS WERE WRITING IN ABOUT THEIR EXPERIENCE WITH MISFIRES AND BAD HEADS, AT ABOUT THE SAME MILEAGE. I THINK THIS NEEDS TO BE LOOKED INTO AND THAT GM SHOULD BE ORDERED TO DO A RECALL. THIS IS THE SAME PROBLEM THEY HAD WITH THE 3.5L ENGINES THEY USED IN THEIR PRE-2007 HUMMER H3 AND COLORADO. I AM GOING TO WRITE MY CONGRESS REP AND ASK THAT WITH THE PROBLEMS THAT GM IS HAVING RIGHT NOW, THAT THIS ALSO BE MOVED FORWARD AND THAT THEY ORDER AN INVESTIGATION. ANY OTHER HUMMER H3 OWNERS WITH THE SAME PROBLEMS SHOULD DO THE SAME THING. *TR

Mileage: 66,000

SMELLED RADIATOR FLUENT WHEN I PARKED INTO THE DRIVE WAY, POPPED THE HOOD AND SAW THAT THE LIQUID SPLASHED ALL OVER THE ENGINE AND PARTS AS WELL AS ON TOP OF THE PLASTIC FAN COVER, WHICH SEEMED ODD. COULDN'T FIND THE LEAK IN THE HOSE. LOOKED AT THE HUMMER FORUM THAT I'M A MEMBER OF AND LORD BEHOLD THERE WAS A BIG TOPIC OF RADIATORS CRACKING AND BREAKING IN THE SAME PLACES WITH THE 2007 MODELS. NO RECALL HAS BEEN ISSUED, SO NO RECALL HAS BEEN SUBMITTED. BUT IT'S A WELL KNOWN DEFECTIVE RADIATOR PROBLEM THAT GM KNOWS ABOUT BUT WON'T RECALL. SO THEY DECIDED TO MAKE A NEW RADIATOR THAT FIXES THE PROBLEM FOR THE 2007 HUMMERS. THE PROBLEM IS THE MIDDLE PIN THAT HOLDS THE RADIATOR RUBS THE NECK AND STARTS A CRACKED UNDER THE STYROFOAM, THUS THE RIGHT DRIVERS SIDE CRACKS IN THE SAME SPOT AS WELL ON THE PLASTIC SIDE. HUNDREDS OF H3 OWNERS HAD THIS HAPPEN TO THEM AND POST PICS AND WHAT NOT, BUT STILL NO RECALL. THIS PROBLEM IS ONGOING AND NOTHING IS BEING DONE. I HAVE SPOKE TO THE HUMMER CUSTOMER SERVICE AND THEY CONTACTED THE LOCAL GM AND THEY SCHEDULED MY SCHEDULED DATE TO TAKE MY H3 IN FEB 17 2014, @ 8 AM AT THE LOCAL GM DEALERSHIP AND HOPEFULLY THEY WILL FIX THIS ISSUE AND NOT CHARGED ME TO FIX DUE TO THE FACT THAT THEY KNOW THE PROBLEM AND HAVE DONE NOTHING TO FIX IT. BUT IT'S BEEN KNOW THAT THEY WILL NOT FIX THE RADIATOR AND THEY SAY IT'S DUE TO CLIMATE WHICH IS FALSE BECAUSE EVERY H3 OWNER HAS IT BREAK IN THE SAME PLACE, AND HAVE SUBMITTED COUNTLESS TICKETS. *TR

Mileage: 77,540

TL* THE CONTACT OWNS A 2007 HUMMER H3. THE CONTACT STATED THAT THE VEHICLE LOST ACCELERATION POWER. THE CONTACT TOOK THE VEHICLE TO THE DEALER WHERE IT WAS DETERMINED THAT THE VALVE SEALS IN THE SECOND AND FIFTH CYLINDER HEADS HAD FAILED. THE DEALER STATED THAT THE FIFTH CYLINDER HEAD WAS THE MOST DOMINANT AND CAUSED THE MAJORITY OF THE FAILURE. THE CONTACT STATED THAT BOTH CYLINDER HEADS HAD A 70 PERCENT LEAK. THE FAILURE WAS REPORTED TO THE MANUFACTURER. THE VIN WAS NOT AVAILABLE. THE FAILURE MILEAGE WAS 65,000 AND THE CURRENT MILEAGE WAS 80,000. *TR

Mileage: 65,000

TL* THE CONTACT OWNS A 2007 HUMMER H3. THE CONTACT STATED THAT WHILE DRIVING 50 MPH, EXHAUST FUMES FILLED THE VEHICLE. THE VEHICLE WAS TAKEN TO THE DEALER FOR DIAGNOSIS WHERE IT WAS ADVISED TO THE CONTACT THAT THE MANIFOLD GASKET NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATED FAILURE MILEAGE WAS 160,000. *TR

Mileage: 160,000

EXHAUST MANIFOLD BOLTS ARE BREAKING OFF THE BLOCK!. *TR

Mileage: 47,400

THE RADIATOR DEVELOPED A STRESS CRACK AND SUBSEQUENTLY FAILED. DEALER ADVISES THIS IS A COMMON PROBLEM FOR THIS MAKE AND MODEL AND THEY STOCK REPAIR PART ACCORDINGLY. DEALER ADVISED TO REPORT INCIDENT AND ENOUGH REPORTS MAY PROMPT SPECIAL SERVICE REPAIR OR RECALL. *TR

Mileage: 67,000

I AM THE ORIGINAL OWNER OF A 2007 GENERAL MOTORS HUMMER H3. THE AUTO HAS BEEN WELL MAINTAINED AND PROFESSIONALLY SERVICED BY A GM DEALERSHIP. THE VEHICLE HAS 53,600 MILES AND IS IN PERFECT MECHANICAL CONDITION EXCEPT THIS RECENT ISSUE WITH PASSLOCK SECURITY WHICH HAS RENDERED THE VEHICLE UNRELIABLE AND A PERSONAL AND PUBLIC SAFETY HAZARD. THE VEHICLE IS LESS THAN 30 DAYS OUT OF WARRANTY AND DEALER WILL NOT REPAIR UNDER WARRANTY. IN RECENT WEEKS, THE PASSLOCK SECURITY LIGHT BEGAN RANDOMLY ILLUMINATING WHILE DRIVING. THIS LIGHT COULD EXTINGUISH ON NEXT START OR STAY ILLUMINATED THROUGH SEVERAL STARTS. TWO WEEKS AGO WHILE RETURNING FROM A TRIP LATER AT NIGHT, THE VEHICLE WAS DISABLED AND FAILED TO START IN AN AIRPORT PARKING LOT. THE PASSLOCK LIGHT CONTINUALLY FLASHED AND THE ENGINE CRANKED, BUT WITHOUT STARTING. A TOW TRUCK WAS CALLED, BUT BY THE TIME IT ARRIVED, AN ATTEMPT TO START THE VEHICLE WAS SUCCESSFUL AND THE LIGHT WAS EXTINGUISHED. THIS HAS HAPPENED AT LEAST TWICE SINCE IN LESS INCONVENIENT AND LESS DANGEROUS AREAS. THE VEHICLE IS UNRELIABLE AND UNSAFE. I CANNOT TRUST IT TO ALLOW MY WIFE TO DRIVE IT FOR FEAR IF HER BEING MAROONED IN A DANGEROUS SITUATION. THE DEALER HAS INDICATED IT MIGHT BE SEVERAL HUNDRED DOLLARS TO REPAIR THIS PROBLEM AND WAS WELL AWARE THAT IT WAS A WIDESPREAD PROBLEM WITH GM AUTOS. THERE ARE HUNDREDS OF SIMILAR COMPLAINTS ON THE INTERNET AND YET THERE IS NO RESPONSE OR ATTEMPT TO REMEDY THIS SITUATION BY THE MANUFACTURER. I AM A SENIOR CITIZEN AND NEED TO RELY ON MY VEHICLE, BUT CANNOT RELY ON A VEHICLE WHOSE SECURITY SYSTEM CAN DISABLE THE VEHICLE AT ANY RANDOM TIME. AS MY REPRESENTATIVE, I REQUEST THE NHTSA ADDRESS THIS WITH THE MANUFACTURER AND REMEDY THIS SAFETY CONCERN. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR

Mileage: 53,600

TL* THE CONTACT OWNS A 2007 HUMMER H3. THE CONTACT WAS TRAVELING 40 MPH WHEN WHITE STEAM EMITTED FROM THE ENGINE. THE VEHICLE WAS TAKEN TO A PRIVATE MECHANIC. THE MECHANIC CONFIRMED THAT THE RADIATOR SEAL WAS CRACKED. THE MANUFACTURER WAS CONTACTED. THE VEHICLE WAS REPAIRED. THE FAILURE MILEAGE WAS 65,370 AND THE CURRENT MILEAGE WAS 77,000.

Mileage: 65,370