Which parts fail
Components named in complaints (fuel pump, injectors, fuel tank, hybrid and EV propulsion).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 1999 Chevrolet Blazer owners, lightly cleaned up (personal details are redacted by NHTSA).
Dt: the contact complained about multiple problems. While driving at 40 MPH on a damp road the driver's side wheel came off. He was able to steer the vehicle safely to the curb. The vehicle was towed to a mechanic, who replaced the upper ball joint on the driver's side and realigned the wheels. Later, he heard a grinding noise coming from the front of the vehicle. The mechanic determined that the other ball joints needed to be replaced. However, they have not been replaced. Also, the windshield fogged up. The mechanic stated the heater core broke and the coolant was leaking. The heater core was replaced. N addition, the vehicle had problems starting. The mechanic had to replace the fuel pump and fuel injector. The starting problem has not returned.
Lower ball joints wear out prematurely. The consumer stated the vehicle was on its fifth set of lower ball joints and it sixth idler arm. The cruise control was inoperative, the grill guard was loose, the rear differential leaked, the door latch was inoperative, the sending unit was replaced, the battery was replaced, the door was readjusted due to a vibration, the left front hub assembly was replaced, the exhaust made a noise, the tensioner and serpentine belt was replaced, the front axle seal leaked and the intake gasket leaked.
1999 Chevrolet s-10 Blazer: design flaw. The fuel gauge sending unit is made as one assembly with the fuel pump. The sending unit goes bad, but fuel pump is still in good operating condition. The cost of replacement is $600. The sending unit and fuel pump should be separate units. As my fuel gauge is not reading correctly, I must keep up with my miles driven by the odometer.
While driving on clear dry express, the gas line blew off at the gas tank. On my 1999 Chevrolet Blazer VIN # [redacted]. As a result gas was sprayed over the underside of the truck, the engine cut off and all power was lost.
Gas sending gauge is irratic, causing me the inability to know how much gas I have. This is a very serious problem which I understand is very costly. According to the several mechanics that I obtained an estimate from this is not an isolated incident. They were all very much aware of this defect in the Chevy Blazer.
The fuel gauge stopped working and/or started fluctuating. It didn't show how much fuel was left in the tank and still doesn't. I was on the interstate and ran out of gas, luckily I made it to the shoulder and wasn't hit. Now it still doesn't work and shows either a full tank or completely empty all the time.
When fuel tank is below a half of tank vehicle shuts down. First time it broke down at a stop light. The second time at 45 miles at black mountain of asherill, the third time 221 south with a trailer Land of wooden pallets. Dealer notified.
While driving 45 MPH vehicle stalled. This caused consumer to drift to the side of the road. Consumer had the vehicle towed to the dealer, and mechanic determined that the fuel pump failed. Mechanic will replace the fuel pump.
Fuel gauge does not work. This occurred at about 40,000 miles. Ultimately has resulted in running out of gas twice. Apparently, the fuel sending unit and fuel pump are an integral system, costing anywhere from $400 to $600 to repair.
No events just after I have been driving a while every day all lights including dash flicker and then when I shut off fuel pump won't pump up. This happens once a day and will not restart till next day.
Fuel System complaints in other Blazer years
Frequently asked questions
How common are fuel system problems on the 1999 Chevrolet Blazer?
NHTSA has 30 complaints about the fuel & propulsion system of the 1999 Chevrolet Blazer, 7% of the model year's 436 complaints. The component named most often is storage › tank assembly (9 mentions).
Is there a recall for 1999 Chevrolet Blazer fuel system problems?
No. NHTSA lists no fuel & propulsion system recall for the 1999 Chevrolet Blazer. 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 1999 Chevrolet Blazer fuel system problems start?
Half of the complaints with a recorded mileage happened before about 88,000 miles, and 10% before 25,000 miles.
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.