How to: Remove and Replace 99-07 classic, Silverado LT HVAC module, heater core and AC evaporator.

Today Joe embarks on a project he's long put off, the replacement of the AC evaporator.

[@mreverythingcollectible334]

I can’t even lie that would be the most Noises car ride ever after I put all that back together 😂😂😂😂missing so many screws and nuts thank god for whoever came up with the hack some things a man can’t do so he have to do the next best thing

[@andrewr6861]

"i don't want to remove my seats" ... carpet and headliner gone 20min later. Thanks for the video.

[@djentlemanjoe5198]

lol yeah it's quite a big project. I decided to fix my headliner while all the interior was out thats the only way to get a crew cab headliner out unless you take the rear window out.

[@balky23]

This made me consider the hack job. Kudos to you for taking this on, but the chances of breaking something else trying to get this done are too high vs cutting some plastic out and applying duct tape and silicon

[@mreverythingcollectible334]

lol right I would have been plugged something back into the wrong thing I swear 😂😂😂😂

[@sheemio2x]

Bro I appreciate you fr you help me out about a lot every other video didn’t say anything about the center console

[@djentlemanjoe5198]

That's what I'm here for! Glad it helped you.

[@ministerfrank4Christ]

Wow I can see why so many will do the hack job. I give you credit for doing it yourself but it is too much for me to do. But great video! I will go the hack job way.

[@xSpoOky_AmBuSh]

Thanks you solved me from guessing about taking out last section for the heater core

[@Joesworldttv]

26:57 - Those special connectors made of plastic become brittle and erode over time due to the hot temperature of the coolant. What I did with my truck was, I removed the eroded connectors completely, cleaned the lines, and reinstalled the rubbed lines using the metal clips. I have not had any leaks since then, and I don't have to ever worry about eroding connectors ever again. It's been over a year now and still no problems.

[@mreverythingcollectible334]

Bro I love you for taking one for the team doing this video but I have to ask why because with the amount of leafs under that hood that car hasn’t been on the freeway in a while

[@josecampos9995]

The famous cut on the knuckle when working on your car lmao feels good at the end if you know what I mean ✊🏽

[@mattsmith6655]

Great video , too much for me to tackle. I see why so many people do the hack job...

[@RoBU9564]

So glad you didn't cut it. I don't like that hack job crap everybody's doing.

[@Fldavestone]

Reminds me of the song,Your'e a better man than i am Gunga Din.

[@user-xl5np5dp8n]

Thanks for the video. Big help.

[@bat__bat]

Lol by the end of the vid his knuckles are bloody, the instructions got set on fire, the seats and steering wheel vanished, and the sun went down. 😂 Honestly would you recommend anyone doing this now that you've done it? The hack job is 45 minutes, looks and works factory. You're not botching a future sale of the vehicle you nitpickers. If anything, the new owner will thank you for paving the way in case it breaks again.

[@ricomcbeth476]

You did that brother

[@BilleyW-om9cr]

You know they make the huge record connections with the little plastic thing that you need at a meadow now 23:51

[@davidandrews5507]

Great video effort Joe. This job is more that I would take on, but it's great to see what's involved in the non-hack approach. I am faced with this project in my 2004 LT 2500HD 4WD. Is your video vehicle the same? If so, what replacement evaporator and heater cores matched your vehicle? My shop is telling me the evap core for the gas model hvac does not work in my diesel's hvac system. If so, why would that be? I am having trouble finding an aftermarket that match's my OEM part no. Thank-you!

[@crmrbig1]

thank for this video bro. kinda sucks the other part deleted

[@robertlamb6016]

very good video thank you

[@8luggarage]

Is it possible to pull the top cover off the dash and remove the upper part of the ductwork? Or would the whole dash system have to come out?

[@WellsLarry]

Looking back, would you go the other way and just cut the evaporator enclosure? I would.

[@djentlemanjoe5198]

No.

[@timothyallencottrell9643]

It’s easier to cut the box and do it

[@jimmorrison-ye2yj]

good video!

[@ElFinoJefe]

I'm still waiting on part 2 how many day you went without sleeping

[@darvyowolf]

How do you get to the blower motor relay that is supposedly on the firewall?

[@yiannigianopoulos8352]

I am an auto mechanic with 40 years expiriance i dont take the dash out or the seats or the steering or the radio or the center console simply unbolt the dash lift it up on the right side and take the box out from under the dash reinstall is the same i can do the whole job in 4 hours...

[@johnbaugh7218]

I've got a 2000 Silverado that I will be replacing the evap coil in soon. Think you could post a video of this process?

[@keclark4]

Double thumbs please. Need to see this method.

[@dylanjones1247]

Can you link a video of the hack please? My trucks my daily driver and I have to do eveyothing at my job. I just don’t have time to do this much. Wish I could

[@djentlemanjoe5198]

The hack is also time consuming but considerably less so. You basically take a grinder, dremel, sawzall, to the metal bar behind the glove box and into the HVAC module to remove the AC evaporator. only problem with this is you need to place the plastic you cut off back onto the HVAC unit and then mud/plaster and reseal it so the air will flow through HVAC the module again. kzbin.info/www/bejne/faXMdndspsahisU

[@timothyallencottrell9643]

Best way to do it right there removing the dash is for someone too dumb

[@estephenchavez9577]

Do you know anything about adding an a/c to this type vehicle I have a heater but no factory a/c. So far the only difference I've noticed is the blend door is vacuum powered and I have no max ac button on hvac control. Wires are ran from factory but just no evaporator. Any info would be appreciated

[@Trad-Am]

I've got an 02 LB7, with floor shift transfer case, so no center console, and the climate control is much simpler, so hopefully it won't be quite as big of a PITA. I've still gotta have the A/C Checked, and find out, if it's the evap, but not looking forward to this, if it is. Just got head gaskets, and 45%sac injectors, retuned, and kryptonite upper control Arms, so gonna have to do this myself, regardless.

[@fivenine1057]

**watches video... Yep, I'm good with the dremel route

[@jonathanravelo2263]

How did you get the bolts off the evap core to put on the new evap core

[@djentlemanjoe5198]

I had to go to oreillys and find the right bolts, those bolts wouldn't come out of my OEM evap core. Any autoparts store should carry these type of HVAC bolts, it comes with a nut and has that E (backwards torx) drive head on it.

[@SOLAR.FLARE.623]

I recently bought my cat eye Chevy like yours and before i got it it sat for a few years and im pretty sure rodents got into the hvac system (it smells really really bad). I want to clean it out as best i can. Does the entire system have to come out similar to what you had to do, or would i be able to clean it out fairly well by removing the vent doors, as well as any vent canals i can easily get to and vacuum it all out?

[@djentlemanjoe5198]

Try removing the fan itself, this is fairly easy to do and could be an area where these critters made their nest. to get the HVAC "module" out you have to take the dash apart and disconnect the bolts from the firewall side, it's not an easy job. I have the LT trim so to get the dash out I had to remove seats and center console. Despite what some of the comments say on this video I don't see how else you can remove the HVAC module without a dash removal. Once the HVAC module is removed you can separate it and clean all the valleyways that air is supposed to move through. I would reccomend getting brand new blend door actuators, AC Evaporator and a heater core just because these trucks are so old there's a decent chance these will go soon and you don't really want to have to touch this again.

[@8luggarage]

Did you get it out? Was there a nest in the system?

[@JMoney1273]

A lot of unnecessary parts getting taken out lol

[@robertcarey8243]

what is the address for the forum pertaining to the project, good job thank you

[@alafrosty]

came here to see splitting the box and replacing the evap core. :-(

[@JMoney1273]

The whole steering wheel and airbag thing was unnecessary didntneed to do that. Just drop the steering column. Just did mine last week

[@gsanchez7154]

Brother after watching this video I think I'll ratther pay the $2500 and I'm broke.

[@cristianrivera2517]

Will this be the same for a 2005 Chevy 2500hd

[@djentlemanjoe5198]

should be!

[@xSpoOky_AmBuSh]

How do you take off the HVac I got off everything and still stuck to the firewall it seems.

[@xSpoOky_AmBuSh]

Still have the HVac box that’s seems stuck I took off all the bolts and ac etc off on the engine bay side and it’s still stuck to the frame

[@djentlemanjoe5198]

@@xSpoOky_AmBuSh Try giving it a good yank inside and see where it might be stuck at, see if you can feel tension somewhere on the HVAC box itself and perhaps you'll find your issue. I had to give mine a really good yank to get it off. Double check and make sure all the firewall nuts are off, there are some neaky ones right behind the engine and under the insulation as well. Here is a link to a wiring diagram www.justanswer.com/chevy/3fd86-2001-chevy-1500-4x4-a-c-5-3l-pickup-heater-core-leaks.html

[@xSpoOky_AmBuSh]

@@djentlemanjoe5198 thanks so much it worked who knew how hard it can be lol 😂 been taking off nuts and bolts just to find out they had nothing to do with the HVac box lol 😂 Now I’m putting it all back together

[@KaTooMaz]

38:13 ''just put the dash back together'...ez peazy.......If you could go back in time what would you do, this or the hack?

[@djentlemanjoe5198]

I would still do it this way, it was well worth the experience. Because this isn't my daily driver I had all the time I needed to do this project, if I was still daily driving this I'd heavily consider the hack for sure.

[@KaTooMaz]

@@djentlemanjoe5198 yea...looks like you were at it for awhile. You went from socks and a tee to boots and hooded jacket. I appreciate the determination but i think the 'hack job' may be the better route. I've seen good hacks and bad ones. A lot of depends on who's doing it and how well they want to do it. Thanks for the vid.

[@davidcastillo379]

Did you check the name on top of the gauge bezle?

[@djentlemanjoe5198]

My bezel didn't have a name on it. No BARB :( GOBBLESS

[@jet6564]

Search this on KZbin for a less destructive dash removal: #boringbuildfriday #heater

[@michealrobinson9778]

The unit you removed is called hvac box??

[@djentlemanjoe5198]

HVAC Module box, verbiage seems to be different depending one what manual you are reading.

[@michealrobinson9778]

@@djentlemanjoe5198 ok

[@michealrobinson9778]

I have. 99 tahoe I think I need to replace the same unit. My air flow is weak. And only blows on defrost

[@djentlemanjoe5198]

@@michealrobinson9778 your actuators are probably stuck closed in the defrost only selection. You CAN recalibrate the system if you have the LT trim package with the digital HVAC control unit, but given the age this is probably wishful thinking. There are videos how to do that out here on youtube. You can replace some of the blend door actuator motors on the HVAC module without removing all of the dashboard

[@michealrobinson9778]

@@djentlemanjoe5198 yeah I’m going to replace the blend door actuator . How can I recalibrate the actuator before replacing it? I heard I can take the negative cable off the battery. And it will recalibrate. Will it!??

[@JoeButter]

You removed a lot of unnecessary stuff to do that job. Steering column has to be dropped and you missed 2 bolts hidden behind the ac duct you access from the top behind the drivers side defrost ducts. There are videos here on KZbin that show the proper and easiest way to pull the dash.

[@timothykosatka2483]

I am sure you figure it out but you did a lot of unnecessary work to get to your part

[@John-wm6fg]

The Engineer who Designed This Housing Unit With Cores That Eventually Fail , Should Be Stretched on The Rack Until Their Body Parts Separate !!! No Service Entry Doors in The Design Causing The Whole Vehicle To Be Dismantled is As Stupid as Not Providing Access Doors For Replacement of Electric in Tank Fuel Pump’s And Don’t Even Get Me Started On The Billions Of Junk Plastic Parts That Where intended for Weight Reduction !!! Hell My 4 Door 56 Pontiac Station Wagon Got as Good or Better Gas Mileage as These Modern Throw Away Vehicles !!!

[@suewatson1912]

At what point did you realize you were in over your head?

[@djentlemanjoe5198]

9:30 pm on a tuesday when the entire interior was gutted and I realized I needed to unbolt things in the engine bay to get the HVAC module out.

[@jaygooch1190]

Screw that

[@Lance-Stroll]

Nice video but fuck this. I'll cut it lol

[@carlosdeleon558]

Some guys really dangerous with hand tools but this guy just waste a day of work taking unnecesary parts out of dash and complete waste taking steering wheel out 🤣

[@royquesada5295]

You obviously did not look hard enough for this job. There are videos that are 2 years old No need to remove steering wheel (just drop steering wheel), radio, seats. No..No...No!! You made it 'way more complicated. 'Basically'?? Basically ?? Wow...not easy to watch.

[@djentlemanjoe5198]

Hey Ray, on an LT package to get the crash bar out you need to remove the seats so you can get the center console out to remove the lower dashboard pieces. removing the steering wheel takes 2 seconds, it really didn't inconvenience me at all. Thanks for the feedback.