Two problems related to defogger heater have been reported for the 1999 Chevrolet S10. The most recently reported issues are listed below.
The heater core failed causing the inside of the vehicle to fog up and result in poor visibility while driving. Nlm.
Heater core failed, causing the defroster and the heater not to operate properly.
| Defogger Heater problems | |
| Wiper problems |