Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
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. …
Fortunately, I had just gotten off the freeway and was looking for an address at a slow speed. All of a sudden the car lurched; I had no steering; I lost all electrical control; the car ground to a halt; smoke came out from under the hood. I and a friend got out of the car. Fortuitously, fire trucks appeared. It turned out they were returning from another incident as I could not believe the immediacy of their response. They took over preventing further aggravation of this situation. The battery was boiling. All the electrical wire harnesses were melted. The upper suspension control arm was broken. The firemen's observation was, if I had been going any faster, the car could have flipped. After being towed to a nearby mechanic, I learned the upper control arm had broken. It impailed the starter which shorted. …
Fuel sensor problem that's been going on with a lot of 2000 Chevy Blazer also trail blazers and also the distributor there is no seal under the distributor cap cause it to have moisture and cause it not to run and you have to replace it this is to the company or whoever's in charge now the fuel system itself is called a spider sense or what I call it not to run it all the time they must be some type of filter besides the one on side of the vehicle itself because they go out within a year or maybe two years or so this must be addressed so hopefully I get some information to help fix the vehicle that I don't think you I hope I could get some information about it because the fule sensor is a big deal wen they last for about a year and then to buy one for about 400 dollars and then pay another 1000 dollars for labor I think that the injection for the fule sensor should be addressed …
It started with my gauges bouncing all over going on and off , then it felt like the brakes were on and I had to give it alot of gas to get going.now the dash will work when I turn the key on but as soon as it starts it goes out with the exception of the oil pressure and the charging gauge. The transmission isnt working right at all and I dont dare drive it anywhere. The fuse box under the hood does not test right, only about half of it has power and I am at a loss there! There has been electrical probnlems with it ever since I bought it.
Tl* the contact owns a 2000 Chevrolet Blazer. The contact stated that the heater and air conditioner failed to function. In addition, the contact stated that the four wheel drive was activated, but failed to engage and the oil pressure gauge displayed an incorrect reading. The ABS warning light illuminated. The vehicle was taken to a dealer. The technician diagnosed that the transfer case needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failures. The failure mileage was 80,000.
4/8 I was driving the car and it just died out as if it was out of gas. There was still power to the radio/lights ect. The engine would crank but not kick over. The engine would not rev upon pressing the accelerator. It was taken to dlr chevy73 by GM roadside assistance. On 4/9, around 2:30 pm I spoke w/ carolyn tirelli-service advisor, who at first said there was not word of the repair. Then stated she saw the tec pulling the vehicle out of the service bay. She advised it appeared he was wrapping up the repair job. At 4 pm service advisor steve lambrose called and advised the tec took the car out for a test drive. Said tec saw a spark, smoke then car was engulfed in flames. Tried to state tec had done no repair. Contrary to what carolyn tirelli advised earlier. Advised fire dept was called c. Jay houck fire marshall camden county [phone]. …
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 …
My customer complained of a transmission failure involving, but not limited to a DTC p0785. I asked my customer if the involved vehicle (2000 Chevrolet Blazer) had any dealer or after market accessories installed, customer adamantly replied: no, "bone stock GM." my customer was not aware that the involved vehicle had a theft deterrent system, manufactured by "karr" and distributed by audiovox with installers nationwide. I have been actively involved with GM dealerships for over forty years and possess a wealth of experience in parts and service experience. I removed the suspect security system and repaired the damaged wiring which resulted in the improper installation. In the past week I have been confronted with four customer complaints which resulted from security systems, aftermarket radios and including aftermarket headlamps. …
My customer complained of a transmission failure involving, but not limited to a DTC p0785. I asked my customer if the involved vehicle (2000 Chevrolet Blazer) had any dealer or after market accessories installed, customer adamantly replied: no, "bone stock GM." my customer was not aware that the involved vehicle had a theft deterrent system, manufactured by "karr" and distributed by audiovox with installers nationwide. I have been actively involved with GM dealerships for over forty years and possess a wealth of experience in parts and service experience. I removed the suspect security system and repaired the damaged wiring which resulted in the improper installation. In the past week I have been confronted with four customer complaints which resulted from security systems, aftermarket radios and including aftermarket headlamps. …
The fuel pump,line and tank are faulty at 35000 miles. I bought it as a used car from santa ana Hyundai who agreed to fix the fuel pump but did not. The transmission is not changing gears properly, it would not start when I turned it off to get gas on 9-26-03, the left front end is popping with a loud noise,the brakes are not antilock brakes,it feels as if I am hitting metal when I stop hard,the panel lights would flicker, lights on dash board when flash when I had seatbelt on. I had a Chevrolet dealership fix the minor things. The battery cable was loose and they oiled the joints to stop the squeak. The dealer refused to fix the fuel pump which is unsafe and demand I pay him money that is already above the price of this car. …
Electrical complaints in other Blazer years
Frequently asked questions
How common are electrical problems on the 2000 Chevrolet Blazer?
NHTSA has 49 complaints about the electrical system of the 2000 Chevrolet Blazer, 8% of the model year's 589 complaints. The component named most often is alternator/generator/regulator (7 mentions).
Is there a recall for 2000 Chevrolet Blazer electrical problems?
No. NHTSA lists no electrical system 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 electrical problems start?
Half of the complaints with a recorded mileage happened before about 94,000 miles, and 4% before 25,000 miles.
Is it dangerous?
Owners linked 1 crash, 3 fires and 0 injuries to electrical system 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.