NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
62 reportsClear category filter69,400 miles · Aug 8, 2007
Engine And Engine Cooling
AFTER HAVING DRIVEN THE VEHICLE FOR ABOUT 2 HOURS ON INTERSTATE ROADS (CONSTANTLY MONITORING THE COOLANT GAUGE - STANDARD FOR ANY TRIP I TAKE). I STOPPED TO GO TO THE REST ROOM AND WHEN I RETURNED AND STARTED THE VEHICLE IT MADE A HORRIBLE LOUD METAL BANGING NOISE. I MOVED THE VEHICLE TO THAT IF IT NEEDED TO BE TOWED IT WOULD B…
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AFTER HAVING DRIVEN THE VEHICLE FOR ABOUT 2 HOURS ON INTERSTATE ROADS (CONSTANTLY MONITORING THE COOLANT GAUGE - STANDARD FOR ANY TRIP I TAKE). I STOPPED TO GO TO THE REST ROOM AND WHEN I RETURNED AND STARTED THE VEHICLE IT MADE A HORRIBLE LOUD METAL BANGING NOISE. I MOVED THE VEHICLE TO THAT IF IT NEEDED TO BE TOWED IT WOULD BE READY. I CHECKED THE COOLANT GAUGE AND IT WAS AT THE VERY END OF THE HOT ZONE, CHECKED THE COOLANT AND FOUND ALMOST NO COOLANT IN THE RESERVOIR. I HAD TO PUT WATER IN TO GET IT HOME (ANOTHER 3 HOURS ON THE ROAD). AT NO TIME DURING THAT TRIP DID THE COOLANT GAUGE INDICATE THAT THE VEHICLE WAS OVERHEATING. I HAVE CHANGED THE OIL PER THE RECOMMENDATION IN THE OWNERS MANUAL AND HAVE DONE MOST OF THE OTHER RECOMMENDATIONS AND HAVE HAD NO OTHER MAJOR ISSUES WITH THE VEHICLE. ON JULY 12TH I HAD THE MANIFOLD INTAKE GASKET REPLACED, OIL CHANGED AND TIRES ROTATED IN PREPARATION FOR THE TRIP.*JB
NHTSA ODI #10198884
130,000 miles · Jun 14, 2007
Engine And Engine Cooling
TL*THE CONTACT OWNS A 1999 CHEVROLET BLAZER. WHILE DEPRESSING THE BRAKE PEDAL AT 5 MPH, THE VEHICLE SURGED FORWARD WITHOUT WARNING. THE MECHANIC WAS UNABLE TO DIAGNOSE THE CAUSE OF FAILURE. THE CONTACT STATED THAT SHE EXPERIENCED THE SAME FAILURE IMMEDIATELY AFTER LEAVING THE MECHANIC. THE VEHICLE WAS TAKEN TO ANOTHER MECHAN…
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TL*THE CONTACT OWNS A 1999 CHEVROLET BLAZER. WHILE DEPRESSING THE BRAKE PEDAL AT 5 MPH, THE VEHICLE SURGED FORWARD WITHOUT WARNING. THE MECHANIC WAS UNABLE TO DIAGNOSE THE CAUSE OF FAILURE. THE CONTACT STATED THAT SHE EXPERIENCED THE SAME FAILURE IMMEDIATELY AFTER LEAVING THE MECHANIC. THE VEHICLE WAS TAKEN TO ANOTHER MECHANIC WHO STATED THAT THE MULTI-PORT FUEL INJECTION SYSTEM NEEDED TO BE REPLACED. HE REPLACED THE PART, BUT THE FAILURE CONTINUED. THE MECHANIC STATED THAT THE VEHICLE MAY NEED TO HAVE ITS SPARK PLUGS REPLACED OR CLEANED. THE SPARK PLUGS HAVE NOT BEEN REPLACED. APPROXIMATELY THREE DAYS LATER, THE VEHICLE FAILED TO START. THE MECHANIC STATED THAT THE MULTI-PORT FUEL INJECTION WAS DEFECTIVE AND REPLACED THE UNIT, BUT THE FAILURE CONTINUED. THE VEHICLE SURGED FORWARD AND BECAME INCREASINGLY WORSE. THE CURRENT MILEAGE IS 150,000 AND FAILURE MILEAGE WAS 130,000.
NHTSA ODI #10193368
85,000 miles · Jan 12, 2007
Engine And Engine Cooling
COOLING SYSTEM-I REPLACED THE RADIATOR AND FLUSHED SYSTEM. DID NOT FIX PROBLEM. LEAKS OIL-INSERTED DIE REPLACED GASKET AND STILL LEAKS. *NM
NHTSA ODI #10178592
66,628 miles · Nov 29, 2006
Engine And Engine Cooling
DURING MAINTENANCE, OWNER NOTICED COOLANT GETTING DIRTY. HAD IT FLUSHED FOUR TIMES. HEATER QUIT WORKING AFTER FIRST FLUSH. BROWNISH-GRAY SLUDGE WAS BLOCKING THE HEATER CORE. MECHANIC STATED IT WAS DUE TO A SMALL LEAK IN THE INTAKE MANIFOLD GASKET CAUSING SMALL AMOUNTS OF DIRTY AIR AND OIL TO MIX WITH COOLANT. SINCE HAVING GASKET…
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DURING MAINTENANCE, OWNER NOTICED COOLANT GETTING DIRTY. HAD IT FLUSHED FOUR TIMES. HEATER QUIT WORKING AFTER FIRST FLUSH. BROWNISH-GRAY SLUDGE WAS BLOCKING THE HEATER CORE. MECHANIC STATED IT WAS DUE TO A SMALL LEAK IN THE INTAKE MANIFOLD GASKET CAUSING SMALL AMOUNTS OF DIRTY AIR AND OIL TO MIX WITH COOLANT. SINCE HAVING GASKET REPLACED, COOLANT HAS NOT GOTTEN DIRTY AGAIN. VORTEC ENGINES 1999-2003 WERE PRONE TO THIS GASKET FAILURE. DEXCOOL DOESN'T MIX WELL WITH DIRT OR OIL. *NM
NHTSA ODI #10174650
85,025 miles · Nov 28, 2006
Engine And Engine Cooling
DT*: THE CONTACT STATED AN OIL LEAK WAS NOTICED AND THE VEHICLE WAS FIRST TAKEN TO A SERVICE DEALER, THEN TO AN INDEPENDENT MECHANIC. THE PROBLEM WAS IDENTIFIED AS A FAILED OIL COOLER LINE AND "O" RINGS. THE LINE AND RING WAS REPLACED. THE REPLACEMENT PARTS WERE NOT THE ISSUE AS MUCH AS THE ENGINEERING CAUSING EXPENSIVE LABOR…
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DT*: THE CONTACT STATED AN OIL LEAK WAS NOTICED AND THE VEHICLE WAS FIRST TAKEN TO A SERVICE DEALER, THEN TO AN INDEPENDENT MECHANIC. THE PROBLEM WAS IDENTIFIED AS A FAILED OIL COOLER LINE AND "O" RINGS. THE LINE AND RING WAS REPLACED. THE REPLACEMENT PARTS WERE NOT THE ISSUE AS MUCH AS THE ENGINEERING CAUSING EXPENSIVE LABOR COSTS FOR A SMALL PART TO BE REPLACED. THE MANUFACTURER WAS NOT CONTACTED.
NHTSA ODI #10174551
18,200 miles · Nov 11, 2006
Engine And Engine Cooling
PURCHASED USED 99 BLAZER FOR BUSINESS USE. 8 MILES FROM DEALERS SITE, THE DAY OF PURCHASE, VEHICLE OVERHEATED - 18,200 MILES ON IT. DEALER REPLACED RADIATOR AND HOSES - FULL FLUSH OF SYSTEM - REFILLED WITH DEXCOOL, AT NO CHARGE. SOLIDIFIED RUSTY SLUDGE CLOGGED RADIATOR, HEATER CORE, AND HOSES - HAD IDENTICAL PROBLEM WITH 96 B…
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PURCHASED USED 99 BLAZER FOR BUSINESS USE. 8 MILES FROM DEALERS SITE, THE DAY OF PURCHASE, VEHICLE OVERHEATED - 18,200 MILES ON IT. DEALER REPLACED RADIATOR AND HOSES - FULL FLUSH OF SYSTEM - REFILLED WITH DEXCOOL, AT NO CHARGE. SOLIDIFIED RUSTY SLUDGE CLOGGED RADIATOR, HEATER CORE, AND HOSES - HAD IDENTICAL PROBLEM WITH 96 BLAZER. PERSONALLY REPLACED DEXCOOL WITH ZEREX. INDEPENDENT MECHANIC HAS SEEN 15-18 OF THESE IN LAST TWO YEARS.*JB
NHTSA ODI #10173176
68,000 miles · Aug 8, 2006
Engine And Engine Cooling
I HAD VALVE NOISE AND TOOK TO LOCAL DEALER TO CHECK. DEALER CALLED AND TOLD ME IT NEEDED A VALVE JOB. AFTER THE VALVE JOB DEALER TOLD ME THERE WAS NOISE IN LOWER PART OF ENGINE AND THOUGHT THE MOTOR NEEDED TO BE REPLACED. THIS 1999 BLAZER HAS 68,000 MILES ON IT. I FEEL GM SHOULD COVER PART OF THIS EXPENSE. DEALER WOULD NOT HE…
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I HAD VALVE NOISE AND TOOK TO LOCAL DEALER TO CHECK. DEALER CALLED AND TOLD ME IT NEEDED A VALVE JOB. AFTER THE VALVE JOB DEALER TOLD ME THERE WAS NOISE IN LOWER PART OF ENGINE AND THOUGHT THE MOTOR NEEDED TO BE REPLACED. THIS 1999 BLAZER HAS 68,000 MILES ON IT. I FEEL GM SHOULD COVER PART OF THIS EXPENSE. DEALER WOULD NOT HELP WITH THIS. *JB
NHTSA ODI #10164901
84,313 miles · Nov 25, 2005
Engine And Engine Cooling
DT: CONTACT TOOK VEHICLE TO A MECHANIC FOR AN OIL CHANGE. THEY CHECKED THE FLUIDS, AND FOUND THE MANIFOLD GASKETS LEAKING. REPAIRS WERE DONE AT THE CONTACT'S EXPENSE.*AK
NHTSA ODI #10143662
Mileage unknown · Apr 22, 2005
Electrical SystemEngine And Engine CoolingFuel System, Gasoline
I PURCHASED MY 1999 BLAZER "USED" IN 5/03, TWO MONTHS LATER THE WATER PUMP STARTED LEAKING HORRIBLY, HAD IT REPLACED. ANOTHER MONTH LATER IT COMPLETELY DIED ON MY IN THE MIDDLE OF MORNING RUSH HOUR, FOUND OUT THAT THE FUEL PUMP WAS COMPLETELY SHOT, AND THE BATTERY WAS NOT GOOD...AT THE SAME TIME. EARLY LAST MONTH I WAS TOLD TH…
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I PURCHASED MY 1999 BLAZER "USED" IN 5/03, TWO MONTHS LATER THE WATER PUMP STARTED LEAKING HORRIBLY, HAD IT REPLACED. ANOTHER MONTH LATER IT COMPLETELY DIED ON MY IN THE MIDDLE OF MORNING RUSH HOUR, FOUND OUT THAT THE FUEL PUMP WAS COMPLETELY SHOT, AND THE BATTERY WAS NOT GOOD...AT THE SAME TIME. EARLY LAST MONTH I WAS TOLD THAT THE HIGH PRESSURE OIL LINES WERE LEAKING BADLY, AND ALSO THAT THE IDLER ARM ON THE FRONT RIGHT IS BAD. NOW AS I AM RESEARCHING THE CHEVY BLAZER MORE AND MORE, I'M FINDING OUT THAT MANY CONSUMERS ARE HAVING THE SAME PROBLEMS IN ALL MODELS. CHEVROLET SHOULD BE HELD RESPONSIBLE FOR MANY OF THESE RECURRING PROBLEMS, AND SOMETHING NEEDS TO BE DONE!*JB
NHTSA ODI #10118274
Mileage unknown · Mar 21, 2005
Engine And Engine CoolingSteeringSuspension
WHILE GOING DONE THE ROAD AT 45 MPH, SUDDENLY THE FRONT PASSENGER WHEEL CAME OFF. TIE RODS AND RIMS WERE DESTROYED. THE BALL JOINTS WERE FOUND TO BE DEFECTIVE. ALSO, ENGINE WAS DEFECTIVE, AND THE VEHICLE WAS NOT RUNNING, EFFECTIVELY ON 3-20-05. *AK
NHTSA ODI #10115459