Two problems related to defogger heater have been reported for the 1999 Chevrolet Blazer. The most recently reported issues are listed below.
Dexcool related problem, no heat in 1999 chevy Blazer. Heater core blocked.
The heater core in my 1999 Chevrolet Blazer has been replaced five times. The heater core problem causes a significant safety risk. When failing, the heater core clogs and then eventually bursts spilling boiling hot water into the Blazer. The radiator and all of its contents drain into the front interior of the Blazer. The steaming hot water places me and my family in danger of being severely burned. I have been very lucky to date, in that the heater core has not burst with my children in the car. So far, I have been able to get the vehicle to the side of the road and quickly get out of the vehicle before I am burned. Additionally, when the heater core bursts the Blazer fills with steam and the chemicals contained within the radiator. The steam and chemicals make it virtually impossible to see and impairs the driverã‚s ability to get all passengers and the vehicle out of harms way. I have been very lucky to date in that I have been able to quickly get the Blazer off of the road. I wonder everyday whether the heater core will burst and cause an accident that harms my children, myself or someone else. Due to the significant safety risk of the Blazer I am very uncomfortable driving it and will not drive it long distances. I feel unsafe with my children in the car and I have coached my children on what to do if it bursts and often force them to sit in the back seat. When driving on the freeway I always stay in a lane that allows easy access to the shoulder so I can quickly get off of the road when necessary. The heater core problem poses a significant safety risk to me and my family. If, general motors refuses to re-purchase my Blazer from me, I will hold general motors responsible for any and all injuries and accidents caused by the ongoing heater core problem. I believe general motors to be a responsible company, one that is not willing to put myself or my family at continued risk of being severely burned or involved in a motor vehicle accident.