Four problems related to defogger have been reported for the 1998 Chevrolet Blazer. The most recently reported issues are listed below.
Within 1 minute of turning on my rear defroster, the rear windshiels exploded. My car was already warmed up and was driven for about 45 minutes before turning on the rear defroster.
Dexcool anti-freeze, this product clogged the cooling and heating system. Dealership was aware of the problem.
Rear defrost, wiper switch.
Heater vents failed.