Three problems related to defogger have been reported for the 1999 Chevrolet Blazer. The most recently reported issues are listed below.
When the heater is running, exhaust fumes/ carbon monoxide from other vehicles come into the cabin via the ventilation system.
Defroster fails to blow on right upper one third of windshield. Dealer unable to fix. Blocks visibility.
Consumer stated the vehicle currently has no heat, consumer believes the heating system that the manufacturer used for the period of 1996-2000 was a dexcool system that was to be maintenance free for 100,000 miles, consumer believes the systems is defective and has caused consumer major repair bills.