Question about 2002 GMC Sierra

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Heater controle module no 2002 gmc truck

Where is heater control modul

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  • joekinch Jan 03, 2009

    blower motor

  • scott May 11, 2010

    for what blower motor or heated seat.

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  • 56 Answers

Right side under dashby heater core

Posted on Jan 30, 2009

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Repair heater control in a 2000 chevy pick up


The best way to get an answer for this go onto Youtube and they usually have fixrs for everything. Between last year and this year I have saved myself thousands of dollars repairing stuff myself through youtube.

Dec 31, 2014 | Cars & Trucks

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Where is 2002 gmc envoy airbag module located???


There is a module that controls the air bags called the SDM Sensing and Diagnostic Module, but the air bags themselves are called modules. If they are referring to the SDM...

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(1) Lower Console
(2) Inflatable Restraint Sensing and Diagnostic Module (SDM)


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Oct 13, 2011 | 2002 GMC Envoy

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2002 envoy abs light on and no blower for heater


The ABS light could be many things. I would bring it into a place that has a Tech II scanner that can talk to the ABS module and it will pinpoint where the problem lies. My problem was the contacts under the horn, so I honked the horn 3 times and the light went off. As far as the blower, if you don't have automatic climate control, it may be your blower resistor module on the blower itself, which is a common problem with these.

Jan 12, 2011 | 2002 GMC Envoy

2 Answers

How to replace the heater core in a 1998 gmc Yukon.


Heater Core Removal & Installation To Remove:
  1. Disconnect the negative battery cable.
  2. Drain the coolant from the engine.
  3. Recover the refrigerant.
  4. Remove the glove compartment.
  5. Remove the floor air outlet.
  6. If equipped with a diesel engine, remove the powertrain control module.
  7. Remove the kick panel trim.
  8. Remove the blower motor.
  9. Remove the steering column.
  10. Tilt back the instrument panel assembly.
  11. Remove the coolant recovery reservoir from the engine compartment.
  12. Disconnect the heater hoses and the evaporator tube.
  13. Remove the accumulator.
  14. Remove the fasteners and the HVAC module assembly.
  15. Remove the cover plate on the bottom of the HVAC module.
  16. Remove the heater core and seal from the HVAC module.
HVAC module mounting fastener locations gm-10-00-1003.gif

HVAC module components gm-10-00-1004.gif

To Install:
  1. Install the heater core and seal.
  2. Install the cover plate on the bottom of the evaporator case to the HVAC module.
  3. Install the HVAC module in the vehicle.
  4. Install the accumulator.
  5. Connect the evaporator tube and heater hoses.
  6. Install the coolant recovery reservoir.
  7. Install the instrument panel.
  8. Install the steering column.
  9. Install the blower motor and cover.
  10. Install the kick panel trim.
  11. Install the powertrain control module and tray.
  12. Install the floor air outlet.
  13. Add coolant to the cooling system.
  14. Connect the negative battery cable.
  15. Evacuate and charge the A/C system.
  16. Check the system for leaks.
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Nov 06, 2010 | 1998 GMC Yukon

2 Answers

2002 gmc envoy - the pasanger door power windows, door locks and seat heaters don't work


Probably the door control module, which controls all those functions, as well as the power mirror. Some have reported getting it to work by disconnecting the battery for 30 seconds, so give that a try. If the module is bad it will have to be either re-programmed or replaced at a dealership, as it has to be coded to the vehicle's security code. I recently had mine replaced, cost was over $700 :-(


Feb 19, 2010 | 2002 GMC Envoy

1 Answer

Heater fan on 2002 Yukon does not operate in front, only rear.


The front blower motor is controlled by the blower resistor module.This is usually the problem with the front blower not working.I looked up the schecmatics and I don`t see separate fuses for the front and rear.But the fuse for the front blower is in the under hood fuse block.If this is good then The problem is probably the resistor module.It is next to the blower motor.The connector from the resistor connects to the blower motor.If you want to confirm this you can check for power and ground at the blower motor connector when you activating the blower switch on.This can be done with a test light.Make sure you have power going into the resistor module also.If you have power going in and no power at the blower motor then replace the resistor.Hope this helps.Good luck.

Dec 28, 2009 | 2002 GMC Sierra C/K1500

1 Answer

Location of heater control module on Dodge Dakota 2002


The heater control module is in most newer vehicles the heater control panel in the dash. Where the fan, heat, a/c controls are...

Sep 14, 2009 | 2002 Dodge Dakota Club Cab

1 Answer

While driving wipers, radio, turn signal, instrument panel lights, all lights on heater/ ac and other controls all stopped working. Vehicle still starts and runs but power is intermitten on some other...


This is all linked to the Body Control Module. After checking all fuses and relays, start there. Warning, it is very hard to get to, and i am not sure as to its exact location on an envoy.

Aug 04, 2009 | 2002 GMC Envoy

1 Answer

Gmc sieria windshield wipers work sometimes


WHEN THEY DO NOT WORK OPEN THE HOOD.RIGHT ABOVE WHERE THE STEERING COLLUM COMES THROUGH THE FIRE WALL IS THE WIPER MOTOR.ON THE MOTOR IS THE WIPER CONTROL MODULE.SMACK IT W/YOUR HAND.IF THE WIPERS START TO WORK THE CONTROL MODULE IS BAD

May 01, 2009 | 2002 GMC Sierra C/K1500

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