How many heater cores are there in a 2001 dodge grand caravan

SOURCE: Replacing the starter on 2001 Dodge Grand Caravan

with most front wheel drives you must remove the passenger tire and reach through to the starter bolt with an extension and if I remember write with a 15 mm socket you can reach through and take out the bolt

SOURCE: Heater blower motor replacement -1997 Dodge Grand Caravan

Remove the cover plate on the passenger side of the heater box, 3-4 screws.
Unplug the motor assembly, remove 3-4 more screws that hold the motor in place and pull it down from its position. Get an aftermarket motor and installed it in the original housing with the original squirrel cage.
Installation is the reverse of removal.

SOURCE: 2001 Dodge Caravan heater blows cold air when stopped

Have you checked the coolant level? What you describe is exactly what happens if the coolant level is low. When stopped at idle, hot coolant is not circulating through the heater core, so no heat. As the engine increases in rpm's when you pull away from the light, the water pump is spinning quicker, and some coolant is making it to the heater core. So check the level, and if it is low, keep an eye on it to see if it drops again. That of course indicates a leak somewhere. Get it fixed, as overheating the engine leads to costly repairs and worse case a new engine. Let me know how you make out with this.

Testimonial: "Thanks Curt! You were right ON!"

SOURCE: Dodge Grand Caravan Sport 2001 Location of PCM

it is located on driverside behind front headlight next to radiator. fuse/relay box is just behind it

SOURCE: where is heater core located on a 2001 grand

The heater core does not look too hard to change. Here are the directions. It should take a skilled technician with all the correct tools about 1.4 hours to change....you might expect to spend 2 hours or a little more doing the job yourself.
The heater core is located on the driver's side of the HVAC housing, near the driver's right foot.

Removal - FRONT HEATER CORE

WARNING: On vehicles equipped with airbags, disable the airbag system before attempting any steering wheel, steering column, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the airbag system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the airbag system. Failure to take the proper precautions could result in accidental airbag deployment and possible personal injury or death.

WARNING: Refer to the applicable warnings and cautions for this system before performing the following operation. Failure to follow the warnings and cautions could result in possible personal injury or death.

1. Remove the silencer boot fasteners located around the base of the lower steering shaft from the dash panel so that it may be pushed aside.
2. Remove the brake lamp switch from its mounting bracket.
3. Disconnect the power brake booster input rod (push rod) from the pin on the brake pedal arm.
4. If equipped with power adjustable pedals, remove the adjustable pedal assembly.

1. Remove the heater core tubes.
2. Remove the two screws that secure the heater core mounting plate to the HVAC air distribution housing.
3. If NOT equipped with power adjustable pedals, pull the accelerator pedal upward (Accelerator Pedal) and push the brake pedal downward (Brake Pedal) for clearance to remove the heater core from the air distribution housing.
4. Remove the heater core by carefully pulling it straight out of the side of the air distribution housing.

1. If NOT equipped with power adjustable pedals, pull the accelerator pedal upward and push the brake pedal downward for clearance to install the heater core into the HVAC air distribution housing.
2. Install the heater core by carefully pushing it straight into the side of the air distribution housing.
3. Install the two screws that secure the heater core to the air distribution housing. Tighten the screws to 2 Nm (17 in. lbs.).
4. Install the heater core tubes.
5. If equipped with power adjustable pedals, install the adjustable pedal assembly
6. Connect the power brake booster input rod (push rod) to the pin on the brake pedal arm.
7. Install the brake lamp switch into its mounting bracket.
8. Install the silencer boot around the base of the lower steering shaft on the dash panel.
9. Reconnect the negative battery cable.
10. If the heater core is being replaced, flush the cooling system.
11. Refill the engine cooling system.