HVAC Controls

[INW-Iron-Steel]

Does anyone know of a source other than Dorman to get HVAC controls from? Mine has been dying for a number of years, but it is getting worse now. A few years back my AC wasn't working. A friend of mine and I traced it back to the actual AC button/switch on the board in the HVAC control. Non-repairable, and at that point I should have swung for a new control unit. Instead, we took a closer look at the wiring diagram and bypassed the button on the dash. The relay for the AC/ AC compressor works on a negative/ground trigger to engage the compressor. So, we installed a switch under the dash and triggered the relay manually to engage the compressor clutch. It has worked great like this for years, but I know it has been harder on the AC clutch running it this way, and it is finally taking its' toll. The clutch will engage and work for a few minutes driving around town, potentially longer driving constant 2000RPM on the freeway, but it eventually stops working again. Just this week I was getting hot air out of the driver side vents while getting cold air out of the passenger vents with both sliders all the way down. This tells me something else is going out in the HVAC control module now, and if I replace the compressor clutch, I should make it function correctly this time.

Anyway, it looks like only Dorman is remanufacturing these things from what I can find online. Is there possibly another source? I haven't had the best of luck with Dorman electronics over the years. If not, I guess I can give it a try, but expectations will be low.

For reference I have the most basic control unit that looks like this
Dorman # 599-003

 

[ORVietVet]

Try ebay for even OE new units. Be aware, you may have a blend door actuator problem, too.

 

[INW-Iron-Steel]

Try ebay for even OE new units. Be aware, you may have a blend door actuator problem, too.

I've been searching Ebay for years now! I know that sounds like a stretch, but from time to time I will find all the OE part numbers and just throw them in an Ebay search, but I haven't found anything good yet. Just a bunch of new no-name generic garbage. Good suggestion on the blend door actuators, I'll make sure those aren't faulty too. They are all noisy, I can hear them when I move a knob or adjust the slider. I am really thinking the issue lies in the control, but I could be completely wrong. Seems like something is internally shorted specifically on the AC circuit somewhere. I don't have issues adjusting the fan or temperature when it is cold out and I need heat.

So, I guess the search for an OE piece continues. Not really a bad thing, just means the wife won't want to take my rig when the weather gets hot.

 

[ORVietVet]

If you are a member at Tahoe/Yukon Forum or even GMT400 Forum, there is a GM parts guy there that can look for an OE part on a shelf, SOMEWHERE, nationwide. Just need to start a thread and then tag him at @915_Tahoe and supply the last 8 digits of your VIN. If you are not a member at either of those, I can reach out for you. He is a great OE parts source. Do you have an OE number for the control head?

 

[ORVietVet]

At ebay...new....1 year warranty....free delivery

Manual A/C & Heater Climate Control Module for Chevrolet Silverado Sierra 1500 | eBay

Compatible with Chevrolet Models Instruction Manual Included No. Window Regulator. Turn Signal Switch. Coolant Expansion Tank. Splash Guard. Roof Racks. Mirror & Glass.

www.ebay.com

Lots of rebuilt and used OE units.


New OE unit--Or Best Offer

New OEM climate control 28084692 15-73499 15-73094 15832313 10370033 | eBay

One new oem 28084692 climate control head dual zone manual control without rear defrost button as shown.

www.ebay.com

 

[ORVietVet]

I asked for a discount from the ebay seller of the Genuine GM control head for $368 and free shipping. He said that $340 and free shipping is as low as can go. Let me know if you want that asap. I have to respond back to him.

 

[ORVietVet]

Sorry, is not free shipping. Is $21.15 shipping.

 

[stutaeng]

Have you tried a junkyard replacement? I personally like that style and thought they were more reliable than the automatic version?

Module Master shows they rebuild your style of AC module for $45. Worth a shot.

 

[ORVietVet]

Have you tried a junkyard replacement? I personally like that style and thought they were more reliable than the automatic version?

Module Master shows they rebuild your style of AC module for $45. Worth a shot.

I agree, I have bought reman/rebuilt HVAC auto heads and had good luck.

 

[INW-Iron-Steel]

I asked for a discount from the ebay seller of the Genuine GM control head for $368 and free shipping. He said that $340 and free shipping is as low as can go. Let me know if you want that asap. I have to respond back to him.

Oh ****, not bad for that OEM one! I will offer him on my Ebay and get that one! Thanks for finding it... your searching skills are obviously superior to mine!

edit- I offered 340 and that offer was auto declined. I just sent a message, we'll see!

 

[INW-Iron-Steel]

Have you tried a junkyard replacement? I personally like that style and thought they were more reliable than the automatic version?

Module Master shows they rebuild your style of AC module for $45. Worth a shot.

I have heard they are more reliable as well. But, my sierra is now 21 years old with 265K and a lot of hours. Prior to my dad owning it, it was a shop truck for a steel business in Northern Idaho. Can't really blame it for calling it quits after all these years...

Honestly, I have never heard of Module Master. I will have to look them up! Thanks for the recommendation!

 

[ORVietVet]

Oh ****, not bad for that OEM one! I will offer him on my Ebay and get that one! Thanks for finding it... your searching skills are obviously superior to mine!

edit- I offered 340 and that offer was auto declined. I just sent a message, we'll see!

Message the seller and tell him you are the "customer" I am inquiring for. He should see me as screen name "movietvet". You can also tell him I am the guy that has been messaging him about the white framing looking like has a crack but has turned out to be a step in the molding and I understood finally. I will tell him, via message what is going on.

 

[ORVietVet]

@INW-Iron-Steel, I just messaged him about all this. It is $340 plus the $21.15 shipping. Good luck.

 

[INW-Iron-Steel]

@INW-Iron-Steel, I just messaged him about all this. It is $340 plus the $21.15 shipping. Good luck.

Whoops, I totally jumped the gun! He told me he would go down to 345 when I messaged him so I just bought it. Lol, guess I just spent $5 more than I could have. I almost mentioned the $340, but I didn't want to risk pissing him off and missing out on it all together. Thanks again for finding it!

 

[ORVietVet]

Glad it all worked out. I explained in the PM.

 

[ORVietVet]

He messaged me and said that the "Make An Offer" limit was set at $349 and that explains why your offer was turned down. I messaged him and asked for ASE certs and military discounts.

 

[ORVietVet]

I told him you would message him about a compressor clutch assembly.

 

[ORVietVet]

I sent him your Sierra info so he can be prepared for your message.

 

[INW-Iron-Steel]

I sent him your Sierra info so he can be prepared for your message.

Sweet, thanks @ORVietVet!

 

[ORVietVet]

He messaged back to me and said would message in the morning after he looked around. He may message me or you.