Over heats at stop lights - 2000 Pontiac Montana

It'll pay to have the crank sensor checked. They're known for heating up and stalling the car when they're no longer any good. Usually once it has cooled down the car will start but as soon as the sensor gets hot it'll stall again

The most common cause of this problem is that the drivers seat heater grid is open or burned out. That is based on 25 years as a Ford dealer technician.

sounds like heater core may need to be cleaned... volks wagons have heating systems that sometimes do very strange things for no apparent reason....

Usually a sign the thermostat is not working correctly, or the radiator is not full of coolant.

If the light and the fuse are good then you probably have a open in one of the heated elements.You need to ohm the upper then the lower heater elements to see which one is bad.The connectors are under the seat.

about your heat i can help you i would say that for your heat the problem is the blower motor and maybe the resistor to so change those two parts and for your light im sorry i can help you good luck

The heater core may have air trapped in it. maybe low coolant level.

LOOK FOR BLOWN WINDOW CIRCUIT BREAKER.YOU HAVE A SHORT IN WINDOW SWITCH OR BAD WINDOW ELECTRIC MOTOR.YOUR HEAT PROBLEM IS A STOPPED UP HEATER CORES.THE STOP LEAK STOP ITS HEAT.THE STOP LEAK HAS STOPPED OR PLUGGED YOUR HEATER CORE SO COOLANT CANT PASS THROUGH IT.YOU GOING HAVE TO FIX RADIATOR LEAK AND REPLACE HEATER CORE TO GET HEAT AGAIN.

Check your radiator fan is cutting in when it's supposed too Sounds like that the cause is no air flow when you stopped or in slow traffic

Had this same problem with a 2001 v70. Dealer needed to download new software to the computer. Took about 20 minutes and solved the problem. (The problem happened at 10 degrees below zero and I went in to see if they could tell me where the fuses for those circuits were located.)

Unfortunately the sofware re-load was not cheap.