HVAC Core

[Musher]

I have a 1999 Tahoe LT and I need to replace the HVAC core, servo motors. Is there a free manual, instructions or diagrams as to what I need to do? Also does anyone make the actual HVAC core?

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

Go to GMPartsDirect.com, enter your VIN, go to the Heating/Cooling section, and look for the exploded diagram of the HVAC components. You should find what you are looking for along with the correct part number. And, the cost will be significantly cheaper than the local dealer.

Also check RockAuto.com, as they also have favorable pricing for OEM parts.

 

[east302]

Check Rockauto for an evaporator core. The 99 GM service manual can be downloaded here, go to post #111:

88-98 Service Manuals

I have finished scanning the 1999 Chevrolet C/K Service Manual set (4 volumes) and Unit Repair Manual set (2 volumes). The files are hosted on and available for download from my Google Drive. Each volume has been OCR'd to enable searching. Click on Available in the table below to download the...

www.gmt400.com

You’ll need to pull the dash to get to the core. Here is how I did mine, maybe it’ll help.

Dash removal and replacement

I replaced the dash in my 1998 K1500 and thought I'd post a how-to. The steps below are from alldatadiy.com which, I think, mimics the factory service manual. I've added pictures to relevant parts as some of the steps are a little vague. I'd really recommend getting a box of ziploc bags and...

www.gmt400.com

 

[Tahoe14]

Rockauto also has a 5% parts discount, look at the top of the home page under “preferred vendor sales”.

 

[Eman85]

I have a 1999 Tahoe LT and I need to replace the HVAC core, servo motors. Is there a free manual, instructions or diagrams as to what I need to do? Also does anyone make the actual HVAC core?

I guess the first thing is to explain exactly what you need to replace.
my understanding from what you posted is you want the complete HVAC module with servo motors. In the module there is a heater core and an evaporator core, both readily available. The servo motors are also replaceable and should be available also from the aftermarket sources.