Check the following items...............
1. A/C heater controller.
2. A/C heater controller doors.
It could be the heater valve which is located under the hood to the passenger side down below the radiator and fan units.
The heater core when air from the blower motor is blowing
You have 2 zone temperature control control. The heater control valve has failed and is open allowing the passenger side heater core to stay hot. It is a very common problem and expensive to repair. It tends to be an intermittent problem and sometimes will work properly.
What do you mean by "has no heat"? No air blowing out, blowing out cold air when heater is on, blowing nothing at all? Heater not turning on? What specifically is happening?
No one knows if:The heater is NOT blowing - or blowing on high speed only, or... The heater IS blowing, but the air is NOT hotEither way, the "Related Questions" below will get you started
Depends, Is it blowing air at all? If not then could be the fan, fan motor, or an electrical problem possibly with the heater controls. If it is just blowing cold then your going to want to check the heater coil, on that truck I believe it is on the passenger side under dash/floorboard. you may smell anti-freeze if so the heater coil is the problem.
Heater Core is going out and needs to be replaced.
The problem is in the controler. TAke it to the dealer. The problem is likely one of the 5 actuators under the dash. There is one for the passenger and one for the drivers side. When you move the temp setting, you should hear them moving. If not, one may need adjusting or replacing.
Give us the symptoms you are experiencing with your 2002 S-10? or Silverado? Such as, leaking coolant on passenger floor. lack of heat. sweet smell when heater is blowing.
The heater core is located on the passenger side, not the drivers side. You do not have to remove the steering column or any parts around it.
I have the same problem with my 95 olds 98 regency, did you find anything out?
Has a bad blend doot actuator. It is under the dash near the ducts, and it looks very hard to change.