Blend Door Actuator

[Doubeleive]

Yea, I replaced the front 2, both hard, especially one in upper center - 05 Tahoe. The rear one was way easier. After replacing, it worked for a few months - after market from Amazon. Big mistake, the original Delco are way more money but worth it.
THEN I found the rear “computer module” needs to be replaced. It’s a little black relay system to the left of the blend door module. Problem is, I can’t find one - out of production for the foreseeable future- none available. And I won’t go to auto wreckers for one
So now I need to set to run cold in summer, then open compartment and set to hot for winter

Out of production means out of production, it's not temporary this leaves either finding a used one or see if dorman makes one

 

[Rolexus]

Thanks Doubeleive, I’m aware of that, and Dorman was the first place I asked… called them (by phone), none available and none coming. Cited “supply chain issues”

Auto wreckers are notorious up here for selling stuff that doesn’t work or is “good used”, meaning “good and used”…lol

Not looking for a solution here, just wanted to share my experience in case anyone else has similar problems. Otherwise some here might just keep replacing the modulators, not realizing a second issue is happening. Found a good YouTube video to help differentiate between module and actuator but can’t find the link

 

[Doubeleive]

Thanks Doubeleive, I’m aware of that, and Dorman was the first place I asked… called them (by phone), none available and none coming. Cited “supply chain issues”

Auto wreckers are notorious up here for selling stuff that doesn’t work or is “good used”, meaning “good and used”…lol

Not looking for a solution here, just wanted to share my experience in case anyone else has similar problems. Otherwise some here might just keep replacing the modulators, not realizing a second issue is happening. Found a good YouTube video to help differentiate between module and actuator but can’t find the link

Rear ac control module failures are not super common so a used one is likely to work just fine. Most places offer a 30 day warranty so if by chance it doesn't work upon delivery then just try another one. R&R is not difficult. Just par for the course owning a 20 year old vehicle. You will find as time goes on certain parts are going to be hard to come by as "new". Some critical parts are often offered as rebuilt or can be rebuilt at a cost.

 

[2591tdj]

Yea, I replaced the front 2, both hard, especially one in upper center - 05 Tahoe. The rear one was way easier. After replacing, it worked for a few months - after market from Amazon. Big mistake, the original Delco are way more money but worth it.
THEN I found the rear “computer module” needs to be replaced. It’s a little black relay system to the left of the blend door module. Problem is, I can’t find one - out of production for the foreseeable future- none available. And I won’t go to auto wreckers for one
So now I need to set to run cold in summer, then open compartment and set to hot for winter

Well…the replacement I ordered was an Amazon off-brand that had lots of positive reviews. Fingers crossed!

 

[S33k3r]

Thanks Doubeleive, I’m aware of that, and Dorman was the first place I asked… called them (by phone), none available and none coming. Cited “supply chain issues”

Auto wreckers are notorious up here for selling stuff that doesn’t work or is “good used”, meaning “good and used”…lol

Not looking for a solution here, just wanted to share my experience in case anyone else has similar problems. Otherwise some here might just keep replacing the modulators, not realizing a second issue is happening. Found a good YouTube video to help differentiate between module and actuator but can’t find the link

I'm a litle late to the party... But there is one option for "like new" -- theoretically; Ever tried Circuit Board Medics (I *think* that is their name). They could rebuild your original one.

As an additional option, there's a guy down here that salvages GMT800s. I can get him to pull one for you. Then you can just install it when you transition from Summer to winter. I don't know the pricing, but will find out if you are interested.