How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Tim's Auto Repair Your Own Question

Tim's Auto Repair
Tim's Auto Repair, mechanic
Category: Chevy
Satisfied Customers: 13271
Experience:  Have owned a repair shop for 25 yrs.
14541291
Type Your Chevy Question Here...
Tim's Auto Repair is online now
A new question is answered every 9 seconds

1999 Chevrolet Silverado 1500: a diagram of a heater core replacement

Customer Question

Can I get a diagram of a heater core replacement on a 1999 Chevrolet Silverado 1500?
Submitted: 4 years ago.
Category: Chevy
Expert:  Tim's Auto Repair replied 4 years ago.

hi

this may help you

thanks

please ACCEPT my answer so I can get credit for my work.i don't receive commission unless you do ..i'm not always going to be giving you good news,so please don't let this stand in the way of you accepting my answer.it does not cost you more money.we will still be able to communicate.. Bonuses and positive feedback are appreciated!if you are not satisfied with my answer,please do not leave bad feed back,i will gladly opt out and let another expert handle the question.PLEASE ASK IF YOU NEED MORE HELP

Heater Core Replacement

REMOVAL PROCEDURE

  1. Drain the engine coolant.
  2. Recover the refrigerant.
  3. Remove the heater/vent module.
  4. Remove the heater core cover screws.

 



 

  1. Remove the heater core cover.

 



 

  1. Remove the heater core.

INSTALLATION PROCEDURE


 

  1. Install the heater core.

 


 

  1. Install the heater core cover.
  2. Install heater core cover screws. Tighten Tighten the screws to 1.6 N.m (14 lb in) .
  3. Install the heater/vent module.
  4. Recharge the A/C system.
  5. Refill the engine coolant.
Heater/Vent Module Replacement

HEATER/VENT MODULE REPLACEMENT

REMOVAL PROCEDURE



 

  1. Drain the engine coolant.
  2. If equipped remove the auxiliary battery.
  3. Disconnect the heater hoses.
  4. Remove the accumulator.
  5. Remove the instrument panel carrier.
  6. Remove the HVAC module drain hose.
  7. Disconnect the electrical harnesses and the ground connections as needed.

 



 

  1. Remove the mounting nuts and the screws from the HVAC module.
  2. Remove the HVAC module assembly from the vehicle.

INSTALLATION PROCEDURE



 

  1. If you are replacing the HVAC module, transfer the components from the old HVAC module as necessary.
  2. Install the HVAC module assembly to the vehicle.
  3. Install the mounting nuts and the screws to the HVAC module.
Tighten
  • Tighten the mounting screws to 4 N.m (35 lb in) .
  • Tighten the mounting nuts to 9 N.m (80 lb in) .

 



 

  1. Connect the electrical harnesses and the ground connections.
  2. Install the HVAC module drain hose.
  3. Install the instrument panel carrier.
  4. Install the accumulator.
  5. Connect the heater hoses.
  6. Install the auxiliary battery.
  7. Fill the cooling system.
Instrument Panel Carrier Replacement

Instrument Panel Carrier Replacement

Removal Procedure

Caution: Refer to Battery Disconnect Caution in Service Precautions.

Caution: Refer to SIR Caution in Service Precautions.

  1. Disconnect the negative battery cable.
  2. Remove the I/P trim pad.
  3. Remove the center console, if equipped.
  4. Remove the driver side knee bolster.
  5. Remove the lower I/P trim panel
  6. Remove the passenger side air bag module.
  7. Remove the radio.
  8. Remove the HVAC control.
  9. Remove the accessory switch housing.
  10. Remove the left air louver housing.
  11. Remove the steering column.
  12. Remove the VIU, if equipped.
  13. Remove the VCU, if equipped.
  14. Remove the remote control door lock receiver module, if equipped.
  15. Remove the data link connector from the I/P.
  16. Remove the park brake release lever from the I/P.
  17. Remove the I/P cluster.
  18. Remove both front window air duct from the I/P assembly.
  19. Remove the harness from the I/P.

 


 

  1. Remove the I/P assembly retaining bolts (3) and nuts (4).
  2. Remove all harness hold down retainers from the I/P assembly.
  3. Remove the I/P assembly from the vehicle.

 


 

  1. Remove the I/P upper brackets.
  2. Disconnect all the electrical connectors from the wiring harness junction block.
  3. Remove the transfer case control module from the bracket, if equipped.
  4. Remove the antenna cable from the cross car duct.
  5. Remove the cross car duct.
  6. Remove the amplifier, if equipped.
  7. Separate the I/P harness from the carrier. Do not remove the I/P harness from the vehicle.

 


 

  1. If replacing the HVAC module, remove the right side of the carrier from the vehicle to gain access to the module.

 


 

  1. Remove the I/P center support bracket bezel (1).

 



Important: Remove all of the parts of the I/P carrier assembly from the vehicle as a unit.

 

  1. Remove the I/P center support bracket bolt.

 


 

  1. Remove the I/P carrier side bolts. The left side is shown, the right side is similar.

 


 

  1. Remove the I/P carrier top bolts (1).

 


 

  1. Remove the I/P carrier (1) from the vehicle.

Installation Procedure


 

  1. Position the I/P carrier (1) in the vehicle.

 



Notice: Refer to Fastener Notice in Service Precautions.

 

  1. Install the I/P carrier top bolts (1). Tighten the bolts to 50 N.m (37 lb ft).

 


 

  1. Install the I/P carrier side bolts. The left side is shown, the right is similar. Tighten the bolts to 50 N.m (37 lb ft).

 


 

  1. Install the I/P center support bracket bolt. Tighten the bolt to 25 N.m (18 lb ft).

 


 

  1. Install the I/P center support bracket bezel (1).

 


 

  1. Install the right side of the carrier to the vehicle, if the HVAC module was removed.
  2. Install the retaining bolts. Tighten bolts to 50 N.m (37 lb ft).
  3. Attach the I/P harness to the carrier.
  4. Install the amplifier, if equipped.
  5. Install the cross car duct.
  6. Install the antenna cable to the cross car duct.
  7. Install the transfer case control module to the bracket, if equipped.
  8. Connect all of the electrical connectors to the wiring harness junction block.

 


 

  1. Install the I/P upper brackets. Tighten the bolts to 2 N.m (18 lb in)

 


 

  1. Install the I/P assembly to the vehicle.
  2. Install the I/P assembly retaining nuts (4) and bolts (3). Ensure the wire harness is routed to all of the openings. Tighten the retaining bolts (3) and nuts (4) to 9 N.m (80 lb in).
  3. Install the harness hold down retainers to the I/P assembly.
  4. Install the harness to the I/P.
  5. Install both front window air duct to the I/P assembly.
  6. Install the I/P cluster assembly.
  7. Install the park brake release lever to the I/P.
  8. Install the data link connector to the I/P.
  9. Install the remote control door lock receiver module, if equipped.
  10. Install the VCU, if equipped.
  11. Install the VIU, if equipped.
  12. Install the steering column.
  13. Install the left air louver housing.
  14. Install the accessory switch housing.
  15. Install the HVAC control.
  16. Install the radio.
  17. Install the passenger side airbag module.
  18. Install the lower trim panel
  19. Install the driver side knee bolster.
  20. Install the center console, if equipped.
  21. Install the I/P trim pad.
  22. Connect the negative battery cable.

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
< Last | Next >
  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
 
 
 

Meet The Experts:

 
 
 
  • Tim's Auto Repair

    mechanic

    Satisfied Customers:

    7641
    Have owned a repair shop for 25 yrs.
< Last | Next >
  • http://ww2.justanswer.com/uploads/TI/tim37857/2011-10-28_23053_S6301814.64x64.JPG Tim's Auto Repair's Avatar

    Tim's Auto Repair

    mechanic

    Satisfied Customers:

    7641
    Have owned a repair shop for 25 yrs.
  • http://ww2.justanswer.com/uploads/DT/dt69nova/2012-6-15_234154_pic1.64x64.jpg Dave Nova's Avatar

    Dave Nova

    Chevrolet Technician

    Satisfied Customers:

    6870
    ASE Master Certification. GM World Class Certification
  • http://ww2.justanswer.com/uploads/ggrote1/2009-06-27_031011_me.jpg Gary's Avatar

    Gary

    Chevy Technician

    Satisfied Customers:

    5404
    15 years GM master tech
  • http://ww2.justanswer.com/uploads/testedtuff/2009-09-26_170108_pictures.jpg John's Avatar

    John

    Master A.S.E Automotive technician

    Satisfied Customers:

    4071
    A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician
  • http://ww2.justanswer.com/uploads/RO/rodcuda/2011-7-25_224114_Donhoff1.64x64.JPG Neal's Avatar

    Neal

    Chevy Mechanic

    Satisfied Customers:

    2306
    Shop Owner and Mechanic on multiple makes.
  • http://ww2.justanswer.com/uploads/goodwrench9124/2008-11-09_220838_dscf0007.jpg goodwrench9124's Avatar

    goodwrench9124

    ASE Certified Technician

    Satisfied Customers:

    2041
    Ase Master Certified, GM Master Certified Tech. Awarded GM Top performer, Hybrid certified
  • http://ww2.justanswer.com/uploads/DR/drivefast1971/2012-1-12_172422_0009051tQKh.64x64.jpg Ron Z.'s Avatar

    Ron Z.

    - Chevy Tech -

    Satisfied Customers:

    1912
    18+yrs experience. State Inspector and Chevy Diagnostics
 
 
 

Related Chevy Questions

Chat Now With A Chevy Mechanic
Tim's Auto Repair
Tim's Auto Repair
Mechanic
7885 Satisfied Customers
Have owned a repair shop for 25 yrs.