So I'm about to have to do the dreaded heater core, does anyone know any easy way to replace the front heater core without removing the whole dash or disconnecting everything and so on and so forth. I know this is going to take a good bit of time to do but I figured before I get started maybe someone can give me insight on a easier way that would save time and frustration
Easy way to replace heater core?
- Thread starter triker97
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swathdiver
Full Access Member
There are youtube videos of people doing this without removing the dash, the hack it up pretty good in there and I can't imagine it sealing well afterwards. Do it the right way. The dash has to be partly disassembled and them rotated out into the service position, not completely removed, to access the heater core. It's a good time to replace your actuators, doors and foam door seals while this is all apart.
I have seen some videos of people just pulling the passenger side out to get to the heater box, I might just have to do it like that. On the rear controls, speed 2 does not work, only 1 & 3 work, would that be the actuator or the resistor? Sorry for all the questions but also when I have the front ac off but on front facing, not floor, I can feel air coming out, when I put it to floor, it stops. I know it's just redirecting it, but because I can feel it before I redirect it, would that be the foam door seals?
that would be recirculation, and unless your heater core is leaking then it is likely not your problem at all
rear only working on certain speeds is probably the resistor BUT could be the control switch as well, you can take them apart and clean them but you have to be very careful the plastic gets brittle and will break with the slightest tension. inside it is a copper on copper contact and it get's build up on it and looses connection. you might have success opening it as much as you can to see inside and then find a spot to drill a hole in the plastic trim to aim some electronic cleaner inside and spray the contacts
swathdiver
Full Access Member
What Wes said X2! ^^^^
Like @Doubeleive was getting at. Why are you replacing the heater core?
It's leaking, I have no heat, it's bypassed right now, I can hear it dripping when I have it on AC also.
Should've mentioned the front heater core is leaking that's why I'm replacing it, and I'll look up some videos on that just so I have a visual of where and what to look for
If I was going in to mine to do that work, I may have to one of these days, I would want all the room so I could do the actuators and address any doors and seals while all apart.
Killabnusmc
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Does any one have videos of this being completed? My heater core is bypassed as well.
Welcome to the forum from Oregon.
Care to share the vehicle/truck info? Or is every 2000 to 2006 GMT800 exactly the same?
Care to share the vehicle/truck info? Or is every 2000 to 2006 GMT800 exactly the same?
iLikeEggs
Potato!
K-Seal has bought me some time with my heater core. About a year ago I was smelling coolant inside. So I tried the K-Seal and it worked. It's not like the old Bars stop leak with the goopy tapioca pellets that clog things up. K-Seal is a ceramic based liquid that goes where it's needed. All I can say is it's still working and no coolant leaks.
BoatyMcBoatface
TYF Newbie
Amazing auto manufacturers in even late model cars are still burying the heater core. I've had people get quoted 2k+ to replace heater cores in Toyota , Honda , ford , all makes. I swear when they want to build a new car they go over to the bin of heater cores, hang it from a piece of rope and let the robots build the vehicle around the heater core. On the Yukon you just need to take your time. If you go chopping up sheet metal you will forever have a rattling dashboard.
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