Which parts fail
Components named in complaints (engine, cooling system, oil leaks, timing chain, exhaust).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2000 Chevrolet Blazer owners, lightly cleaned up (personal details are redacted by NHTSA).
The handle that allows you to recline the seat broke off flushed with the seat, this happened to both the driver and passenger seats in June 2005. The hood will not pop up when the lever was pulled until one banged on the grill or the hood in certain spots, which just started in March of 2007. The gas mileage dropped from 20 mpg to 16 mpg within 6 months. The back glass stuck and was hard to open, started in 2006. When turning on the air conditioner (A/C ) the car had no power, I have to turn it off when accelerating on the interstate or on hills. If the cruise control was set it kicked off when the A/C was on. When I needed to stop quickly the brakes failed, and felt a grinding sensation through the pedal, but the mechanic changed the brakes and checked the rotors, but hasn't found any problem. Suspected a defect somewhere in the brake system\ as of 2005. …
Problems that are not saftey issues: air conditioning doesn't work; door hinge pin needs to be replaced; driver's window slips off track to the outside of the frame, resulting in the back side of the window cracked at least a 1/4 of an inch (was told by friendly Chevrolet in springfield il that this is a design problem and can not be fixed; called Chevrolet and was told to take it back to dealer and pay them to reevaluate the problem; ) safty issues: ball joints need to be replaced;gas gauge sending unit doesn't work;;differential is leaking and plug connected to this needs to be drilled out and rethreaded to find out how bad the leak is; windshield wiper on driver's side loose and flips off to the left of the windshield in heavy rain and snow; electrical harnass needs to be replaced; engine insolation pealing off under hood; engine light on continually; car stalls intermitantly(first …
Problem with the dex-cool system in my 2000 chev Blazer---heater went out July 2004, was under extended warranty and heater core replaced, radiator was flushed at the same time. One year later vehicle over-heating again, no longer under ext warranty...paid $212 for the flush today and filed complaint w/ GM due to the obvious problem which they deny with dex-cool ( 8 states have class-action suits). Was told by GM rep that the coolant system is a maintainence item and they could not assist or accept responsibility in the reapair cost. Spoke with the GM dealership who argued my case, asked what maintainence required on my part, since the dex-cool maint schedule is 155K miles, maint free---my vehicle has 70K miles and second flush in 12 mo period. …
I have a 2000 Blazer lt with 128,000 miles that has had heating/cooling system problems for several years. Had dex-cool in system which I monitored regularly to make sure has topped up. GM states dex-cool is maint free to 155,000 miles. When vehicle reached 100,000 miles, I began to loose heat. I noticed a crystal-like residue floating in coolant. Drained, back flushed heater core and flushed system 3 times then added prestone (green) coolant. After about 10,000 miles began to loose heat again, repeated flush and fill. Every year since, when colder weather sets in, the same problem shows up and I go through the same flush and fill procedure. Dex-cool has left so much sludge throughout the system I can't get it all out and it continues to plug the system. I have replaced two water pumps, three thermostats and have spent hundreds of dollars just doing flush and fills. …
Blazer seeping oil from oil pan, will not fix only if I pay 75% due to 90 day warranty,and told if they would fix it I would only create more problems, it was also told by dealer and Chevy that it is normal for year and mileage, I don't think so with 47,000 miles, when I owned a 97 Chevy with 97,000 miles , no leaks but salesman knew of it 3 weeks after purchase when 30 day bumper to bumper existed,was at dealership July 6, 2006 for all items but Chevy nor dealership documented it or the grease fittings, lube, check fluid levels like was suppose to do, salesman checked fluids for me after they neglected to do their job.. So Chevy says can't go by salesman because he no longer works there, seeping oil from oil pan is not normal, I didn't receive a odometer paper on it or my trade in.. …
My 2000 Blazer ls zr2 has 68000 miles on it. Around November 2005, when I needed my heater in the mornings, I noticed that it would not blow any hot air. I have had the cooling system flushed and replaced the thermostat and still have no heat. I can smell coolant every now and then while I am driving. So, I am LED to believe that my heater core is leaking and or blocked. I have done some searching around the internet and have noticed that this is a common problem with Blazer's and it is caused by the dex-cool cooling forming a "sludge" in the cooling system. I feel that GM should be responsible for my repairs, as they have known of this issue for years, yet still continue to manufacture vehicles with this type of coolant anyhow.
Never took in for rear wiper. Started leaking oil, so took to dealer here in roosevelt 21, dec. Started to provo jan. 10, cruise control went off, speedometer would not work, this caused the car to not shift. Pulled off road as car stops, turned car back on, turned around to return home. Afraid to continue over mountains. Took to murry motors, could not find anything wrong. Took for a 30 minute mile ride and it happened again. Will take back this following Monday to be checked again. Can not drive if it wont shift. Took to murray motors for oil leak. They replaced two hoses. Not connected properly, causing leak. Thanks mrs. Riding. ****dimsii ivoq entry posted after 12/12/02 cut-over to artemis*****770837
Accelerator sticking. From standing start, accelerators pedal requires considerable pressure to move from resting position. As pedal is depressed, vehicle jumps forward before operator can remove pressure. Complaints to dealer resulted in the estimate of a $100.00 charge to clean carbon from throttle body and apply a chemical treatment to help prevent further sticking. This should not be a maintenance item as it could result in uncontrolled acceleration, possible loss of control, and accident. Dealer diagnosis was almost instantaneous so the problem must be a common one.
Tl contact owns a 2000 Chevrolet Blazer. The contact stated that the two rear brake lights above the hitch fail to illuminate when the brake pedal is depressed. The dealer stated that the brake lights were already repaired according to the mechanic's records. She stated that her vehicle is under recall number 01V364000 (exterior lighting:hazard flashing warning lights:switch), but the dealer will not repair the vehicle for free since it was already performed. The current and failure mileages were 134,000. Updated 02/01/08. The drive belt and power steering pump.
Always smell fuel while driving replaced all fuel systems then all sensors needed replacing so I did that and now there telling me I have a electric problems since buying this vehicle new I put over 6000.00 dollars into and I still have all the same problems mostly with the fuel system I still smell alot of fuel when driving and back firing and shutting off in the middle of driving I have all my receipts from work done on the whole fuel system and I've looked up this kind of Blazer and everyone who owned one has the same problems.
Engine complaints in other Blazer years
Frequently asked questions
How common are engine problems on the 2000 Chevrolet Blazer?
NHTSA has 64 complaints about the engine & cooling of the 2000 Chevrolet Blazer, 11% of the model year's 589 complaints. The component named most often is engine › gasoline (17 mentions).
Is there a recall for 2000 Chevrolet Blazer engine problems?
No. NHTSA lists no engine & cooling recall for the 2000 Chevrolet Blazer, though it has 4 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2000 Chevrolet Blazer engine problems start?
Half of the complaints with a recorded mileage happened before about 70,000 miles, and 13% before 25,000 miles.
Is it dangerous?
Owners linked 1 crash, 0 fires and 0 injuries to engine & cooling problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.