Question about 2008 GMC Yukon Denali

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Heater hose repair heater hose

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You dont normally repair them, other than if its cut thru.. and leaking you can put a short pipe and 2 clamps on it and refill with antifreeze..if its split longways need to replace entirely from parts store..

Posted on Dec 25, 2013

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Diagram for heater core replacement on 1986 elcamino


Best to get a repair manual. You will need to remove part or all of the dash, since the heater core is inside the car on the firewall. An Autoparts store would have a repair manual for your car. In The Meantime: 1. Disconnect the heater hoses, at the firewall in the engine compartment. 2. Connect the two hoses together using a piece of tubing and a couple of hose clamps. (This will bypass the heater core, until you can get it fixed.)

Jan 22, 2014 | 2000 Chevrolet Silverado

1 Answer

1999 ford Expedition heater core removal


If the hose is leaking at heater hose,maybe heater core is bad,here's a repair guide to the heater core and hose.

Dec 22, 2012 | 1999 Ford Expedition

1 Answer

Replace heater core


Hello,

To replace the core of your GMC 2001 Jimmy, You will be needing these instruments, Repair manual, Socket set, Screwdrivers, once You have them together, please follow the steps below:
  1. Lift up your car's hood and locate the heater core. If you are not sure where the core is located, an auto parts store employee or a repair manual can help.
  2. Remove the screws or bolts that hold the heater core in place. You may need to remove other parts of the car before being able to access the heater core.
  3. Disconnect the intake and outtake hoses from the heater core. You may need a special tool to remove the couplings that connect the hoses to the heater core (refer to your car model's repair manual.)
  4. Remove the heater core. Be careful not to tip the core over, as coolant will leak out.
  5. Reconnect the upstream and downstream hoses on the new heater core in the same matter that they were attached to the faulty core. Leaks can occur if the hoses are not connected properly.
  6. Screw or bolt new heater core in place.
  7. Finally, replace all of the removed car parts.
That is how to replace Your heater core.
Hope this was helpful. Thank You for using FixYa!!!

Jan 12, 2011 | 2001 GMC Jimmy

1 Answer

Need to replace heater core


CAUTION: Refer to Battery Disconnect Caution in Cautions and Notices.

79212518
  1. Disconnect the negative battery cable.
  2. Drain the engine coolant. See: Service and Repair
  3. Recover the refrigerant.
  4. Disconnect the heater hoses. See: Heater HoseService and Repair
  5. Remove the accumulator.
  6. Remove the instrument panel carrier. See: Instrument Panel, Gauges and Warning IndicatorsInstrument Cluster / CarrierService and Repair
  7. Remove the HVAC module drain hose.
  8. Disconnect the electrical harnesses and the ground connections as needed.
  9. Remove the HVAC module mounting nuts and the screws.
79212349
  1. Remove the HVAC module assembly. Set the HVAC module assembly on a bench.
79212352
  1. Remove the heater core cover screws.
  2. Remove the heater core cover.
79212355
  1. Remove the heater core.
INSTALLATION PROCEDURE

79212355
  1. Install the heater core.
79212352
  1. Install the heater core cover.
NOTE: Refer to Fastener Notice in Cautions and Notices.
  1. Install heater core cover screws.
Tighten
Tighten the heater core cover screws to 9 N.m (80 lb in)

79212349
  1. Install the HVAC module assembly to the vehicle.
  2. Install the HVAC module mounting nuts and the screws.
Tighten
  • Tighten the mounting bolts to 4 N.m (35 lb in)
  • Tighten the mounting nuts to 9 N.m (80 lb in)
79212518
  1. Connect the electrical harnesses and the ground connections as needed.
  2. Install the HVAC module drain hose.
  3. Install the instrument panel carrier
  4. Install the accumulator.
  5. Connect the heater hoses.
  6. Connect the negative battery cable.
  7. Refill the engine coolant. Refer to Draining and Filling Cooling System in Engine Cooling.
  8. Recharge the air conditioning system. Refer to Refrigerant Recovery and Recharging .

Jan 01, 2011 | 1999 Chevrolet Silverado 1500

1 Answer

2006 grand prix heater only blows cold air. both heater hoses are hot blower motor works fine.


Sounds like the temperature blend door actuator may be bad or the vacuum hose to it is disconnected.

Poor Heater System Performance CAUTION
Check all fluid levels and adjust as needed, before operating vehicle for extended periods at idle.
  1. Start the engine.
  2. Idle the engine until the thermostat opens (upper radiator hose will be hot) Is the engine at normal operating temperature (approx. 200° F)? If yes, go to the next step. If no, go to step 16.
  3. Set the mode selector to FLOOR mode.
  4. Set the heater control selector to the warmest temperature setting.
  5. Set the blower speed the lowest setting.
  6. Carefully feel the inlet and outlet heater hoses at the heater core. Is the inlet heater hose significantly hotter than the outlet heater hose? If yes, go to step 14. If no, go to the next step.
  7. Set the mode selector to PANEL mode.
  8. Select the maximum blower speed.
  9. Select the warmest temperature setting.
  10. Place a thermometer into the center I/P PANEL air outlet and affix a second thermometer to the heater core outlet heater hose.
  11. Record the temperature at the center I/P PANEL air outlet and at the heater core outlet heater hose. Are the two temperature readings about equal? If yes, go to the next step. If no, go to step 13.
  12. Inspect and repair the cowl, cowl area, recirculation door, and the HVAC evaporator/heater core case for cold air leaks. Repair any problems found, go to step 17.
  13. Inspect the temperature door operation. Repair any problems found, go to step 17.
  14. Turn OFF the engine. Back-flush the heater core. Start the engine. Select the FLOOR mode and the lowest blower speed. Select the warmest temperature setting. Feel the temperature of the inlet and outlet heater hoses at the heater core. Is the inlet heater hose feel significantly hotter than the outlet heater hose? If yes, go to the next step. If no, go to step 17.
  15. Replace the heater core. When the repair is completed, go to step 17.
  16. Check for low engine temperature problems, Repair or replace as needed, go to step 17.
  17. Operate the system in order to verify the repair. If the system operates properly, the repair is complete. If the heater still does not work properly, repeat the entire procedure.

Nov 19, 2010 | 2006 Pontiac Grand Prix

1 Answer

The heater a/c or defroster will not work in my car no air will blow through the vents


Is the fan turning (do you hear it)? If it's blowing, but not passing the blend door, then that would describe why it doesn't deliver air to the passenger compartment.

Poor Heater System Performance CAUTION
Check all fluid levels and adjust as needed, before operating vehicle for extended periods at idle.
  1. Start the engine.
  2. Idle the engine until the thermostat opens (upper radiator hose will be hot) Is the engine at normal operating temperature (approx. 200° F)? If yes, go to the next step. If no, go to step 16.
  3. Set the mode selector to FLOOR mode.
  4. Set the heater control selector to the warmest temperature setting.
  5. Set the blower speed the lowest setting.
  6. Carefully feel the inlet and outlet heater hoses at the heater core. Is the inlet heater hose significantly hotter than the outlet heater hose? If yes, go to step 14. If no, go to the next step.
  7. Set the mode selector to PANEL mode.
  8. Select the maximum blower speed.
  9. Select the warmest temperature setting.
  10. Place a thermometer into the center I/P PANEL air outlet and affix a second thermometer to the heater core outlet heater hose.
  11. Record the temperature at the center I/P PANEL air outlet and at the heater core outlet heater hose. Are the two temperature readings about equal? If yes, go to the next step. If no, go to step 13.
  12. Inspect and repair the cowl, cowl area, recirculation door, and the HVAC evaporator/heater core case for cold air leaks. Repair any problems found, go to step 17.
  13. Inspect the temperature door operation. Repair any problems found, go to step 17.
  14. Turn OFF the engine. Back-flush the heater core. Start the engine. Select the FLOOR mode and the lowest blower speed. Select the warmest temperature setting. Feel the temperature of the inlet and outlet heater hoses at the heater core. Is the inlet heater hose feel significantly hotter than the outlet heater hose? If yes, go to the next step. If no, go to step 17.
  15. Replace the heater core. When the repair is completed, go to step 17.
  16. Check for low engine temperature problems, Repair or replace as needed, go to step 17.
  17. Operate the system in order to verify the repair. If the system operates properly, the repair is complete. If the heater still does not work properly, repeat the entire procedure.
Insufficient Defrosting CAUTION
Check all fluid levels and adjust as needed, before operating vehicle for extended periods at idle.
  1. Start the engine, select the DEFROST mode, and select the maximum blower speed. Does sufficient air flow from the defroster outlets? If yes, go to the next step. If there is insufficient airflow, go to step 9.
  2. Measure the engine operating temperature. Does the engine reach normal operating temperature (approx. 200° F)? If yes, go to the next step. If the engine does not reach normal operating temperature, go to step 7.
  3. Select the minimum blower speed. Select the warmest temperature setting. Carefully feel the inlet and outlet heater hoses at the heater core. Is the inlet heater hose significantly hotter than the outlet heater hose? If yes, go to step 10. If the hose temperature feels approx. the same, go to the next step.
  4. Test the operation of the A/C compressor clutch. Does the A/C compressor clutch engage? If yes, go to step 6. If the compressor clutch does not engage, go to step 5.
  5. Inspect A/C compressor clutch and controls. Repair or replace as needed, go to step 13.
  6. Determine if the A/C system is operating within specifications. If yes, go to step 8. If no, go to step 11.
  7. Check the low engine temperature problem. Repair any problems found, go to step 13.
  8. Inspect for correct operation of the recirculation door. If the door is operating correctly, go to step 13. If the door is not operating properly, go to step 12.
  9. Check air delivery system. Repair any problems found, go to step 13.
  10. Check the heater core for blockage. Repair or replace as needed, go to step 13.
  11. Check A/C performance. Repair or replace as needed, go to step 13.
  12. Repair the recirculation door concern. When the repair is complete, go to step 13.
  13. Operate the system in order to verify the repair. If the system is operating properly, the procedure is complete. If the system is still not providing proper defrosting, repeat the entire test.
Noise from Blower Motor
  1. Inspect the air inlet grille for debris. If the grille has debris, go to step 7. If the grille is clear, go to the next step.
  2. From inside the vehicle, close all vehicle doors and windows, turn ON the ignition, with the engine OFF, and cycle the blower motor through all speeds in order to determine where and when the noise occurs. If noise is heard during the blower operation, go to step 3. If there is no noise, go to step 10.
  3. Inspect for excessive vibration at each blower motor speed by feeling the blower case. If there is vibration, go to step 5. If no vibration is present, go to the next step.
  4. Listen to the blower motor at each blower speed. Is the blower motor making a squeaking or chirping noise? If yes, go to step 8. If no noise exists, go to step 10.
  5. Remove the blower motor, and inspect the blower motor and impeller for deposits of foreign material. If there is debris, go to step 7. If there is no debris, go to the next step.
  6. Inspect the blower motor impeller for cracked blades, loose impeller retainer, or improper impeller alignment. If any of these conditions exist, go to step 8. If none of these exist, go to step 9.
  7. Remove the foreign material, go to step 10.
  8. Repair or replace blower motor or impeller as needed, go to step 10.
  9. Install the blower motor, go to step 10.
  10. Operate the system in order to verify the repair. If the condition has been corrected, the repair is complete. If noise still exists, repeat the entire procedure.

Nov 06, 2010 | 2006 Kia Sportage

1 Answer

When turn on no heat ac works fine


Find the heater hoses and carefully touch or lightly grab hoses after engine is warm with light gloves on both hoses should be hot! if only one is hot chanes are you have a plugged heater core OR a heater valve that is stuck. Look on the heater hoses or the intake manifold for this valve it will have a small vacuum hose going to it. Also make sure your cable to the heater box is hooked up to the temperature blend door. You can call or go to a public library and see if they have repair manuals you can look at. It would be helpful to know the year and model of the Pontiac you are working on. PLEASE NOTE if you take it to a repair facility just give them the symptoms not what you think it is. Also be aware that replacing heater cores can get very exspensive so you need to KNOW the problem. Depending on your ability you may want to take it to a repair facility.

Oct 13, 2010 | Pontiac Grand Am Cars & Trucks

1 Answer

I have a 1995 chevy silverado 1500. the heater hose bursed. do I have to remove the dash board to repair it?


The heater hose connects to the heater core through the fire wall, under the hood, remove heater hose clamp at fire wall under the hood, remove clamp at other end, install new heater hose, no you don't have to do any thing under the dash.

Sep 09, 2010 | 1999 Chevrolet Silverado 1500

1 Answer

The rear heater does not heat up when switch is on


Troubleshooting by Symptom Poor Heater System Performance
  1. Start the engine. Allow the engine to idle. Does the engine reach normal operating temperature? If yes, go to the next step. If no, go to step 8.
  2. Allow the engine to idle. Select the FLOOR mode. Select the minimum blower speed and the warmest temperature setting. Feel the temperature of the inlet and outlet heater hoses at the heater core. Does the inlet heater hose feel warmer than the outlet heater hose? If yes, go to step 6. If no, go to the next step.
  3. Install a thermometer into the center I/P PANEL air outlet. Secure a thermometer to the heater core outlet heater hose. Select the PANEL mode. Select the maximum blower speed. Select the warmest temperature setting. Record the temperature at the center I/P PANEL air outlet and at the heater core outlet heater hose. Are the two temperature readings about equal? If yes, go to the next step. If no, go to step 5.
  4. Inspect and repair the cowl, recirc door, and the HVAC module case for cold air leaks. If problems are found and repaired, go to step 9.
  5. Inspect the temperature door operation. Perform any necessary repairs. When repairs are made, go to step 9.
  6. Turn OFF the engine. Backflush the heater core. Start the engine. Select the FLOOR mode and the lowest blower speed. Select the warmest temperature setting. Feel the temperature of the inlet and outlet heater hoses at the heater core. Does the inlet heater hose feel warmer than the outlet heater hose? If yes, go to the next step. If no, go to step 9.
  7. Replace the heater core. When the repair is complete, go to step 9.
  8. Repair the low engine temperature concern. When the repair is complete, go to step 9.
  9. Operate the system in order to verify the repair. If the system operates properly, the repair is complete. If the heater still does not work properly, repeat the entire procedure.
Insufficient Defrosting
  1. Start the engine, select the DEFROST mode, and select the maximum blower speed. Does sufficient air flow from the defroster outlets? If yes, go to the next step. If there is insufficient airflow, go to step 9.
  2. Measure the engine operating temperature. Does the engine reach normal operating temperature? If yes, go to the next step. If the engine does not reach normal operating temperature, go to step 7.
  3. Select the minimum blower speed. Select the warmest temperature setting. Feel the temperature of the inlet and outlet heater hoses at the heater core. Does the inlet heater hose feel warmer than the outlet heater hose? If yes, go to step 10. If the hose temperature is not right, go to the next step.
  4. Test the operation of the A/C compressor clutch. Does the A/C compressor clutch engage? If yes, go to the next step. If the compressor clutch does not engage, go to step 6.
  5. Repair or replace the A/C compressor clutch. When the repair is complete, go to step 13.
  6. Repair the A/C compressor clutch concern and determine if the A/C system is operating within specifications. If yes, go to step 8. If no, go to step 11.
  7. Repair the low engine temperature concern. When the repair is complete, go to step 13.
  8. Inspect for correct operation of the recirculation door. If the door is operating correctly, go to step 13. If the door is not operating properly, go to step 12.
  9. Repair the air delivery concern. When the repair is complete, go to step 13.
  10. Repair the heating concern. When the repair is complete, go to step 13.
  11. Repair the A/C performance concern. When the repair is complete, go to step 13.
  12. Repair the recirculation door concern. When the repair is complete, go to step 13.
  13. Operate the system in order to verify the repair. If the system is operating properly, the procedure is complete. If the system is still not providing proper defrosting, repeat the entire test
. Noise from the HVAC Module
  1. Start the engine. Cycle through all blower speeds, A/C mode settings and temperature control settings. Determine the type of noise, whether it is a scraping, popping, ticking, clicking, chirping or groaning, or an air rush or whistle. Is a scrape or pop noise evident when selecting modes or temperature settings? If yes, go to step 5. If no, go to the next step.
  2. Is a tick/click, chirping, groaning or scraping noise present, but decreases as blower motor speed is decreased? If yes, go to step 5. If no, go to the next step.
  3. Is an air rush/whistle noise evident in all modes but not all temperature settings? If yes, go to step 5. If no, go to the next step.
  4. Is an air rush/whistle noise evident only in defrost or floor mode? If yes, go to step 5. If no, examine for other sounds, repeat step 1.
  5. Remove the I/P trim pad. When complete, go to the next step.
  6. Inspect the airflow doors for proper operation and the ducts for obstructions or foreign materials. Were any of these conditions found? If yes, go to step 9. If no, go to the next step.
  7. Inspect the mode and temperature doors and seals for warping or cracking. Are the doors in normal condition? If yes, go to step 9. If no, go to the next step.
  8. Replace the appropriate door and/or seals. When the repair is complete, go to step 10.
  9. Remove any obstructions or foreign material found. When the repair is complete, go to step 10.
  10. Install the I/P trim pad. When complete, go to the next step.
  11. Operate the system to verify the repair. If system operates without noise, the repair is complete. If noise still exists, repeat the entire procedure.

Jul 21, 2010 | 1999 Chevrolet Astro

1 Answer

Heater core hose bibb broke off at fire wall in


If the copper/metal hose broke free from the heater core, the heater core will need to be removed and replaced. let me know what size engine and I can send you the removal procedures. Big job!!

Mar 05, 2010 | 2000 Chevrolet Silverado

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