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Bought a 1989 Silverado K5 Suburban

B

BPatrick

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Feb 5, 2006
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Location
Cassopolis, MI
Hey guys...I haven't been on here much as I'm knee deep in a restoration of a 1991 Chevy Blazer K5 frame off. Having a ball but wow does it take time. I'll post pictures soon. I just bought a 1989 Suburban K5 4x4 as it fell into my lap. This truck is corporate blue from texas with no rust. everything works and this truck is mint. The guy put in a Chevy crate replacement motor and it's got 20,000 miles on it. I know the guy and helped him put it in 3 years ago. He hardly drives it and never in the winter as we live where they salt the roads. I told him to let me know if he ever wanted to sell it. Well he did for $2,800.00 last week. I'm excited because I always wanted one of these and now I'm getting it ready for daily driving except winter. This is too nice to ruin in the Northern Indiana salt. Mechanically its solid minus a few things. One of the calipers is frozen and some other misc. things but I have this suburban with rear air. and I'm not really knowledgable regarding this. Is it a/c only or heat and a/c depending on what the controls are up front. I have a control on the dash that says rear air low high. I needed to change out the heater core and he said that my suburban has two heater cores. this leads me to believe that its a/c and heat. any help here would be greatly appreciated. first, does this have two heater cores, and second, where is the second as I looked around the hood and didn't see anything.

I appreciate the help on this and I'm sure I'll have some more questions.

BPatrick
 
Does it have barn doors? If it does it might have rear heat but its on the floor on the side. The rear a/c is up top.
 
BPatrick said:
yes it does have barn doors
Click to expand...

Open the doors up in the rear and look on the floor inbetween the rear seat and the door where the floor meets the side. If you have rear air there will be a little box looking thing there. Should be the passenger side if remember right.
 
easy now...i just took a picture for the nay sayers...i haven't uploaded a picture to a website before so I'm trying to get it up here. be patient and keep the advice coming. :)
 
I've been inspecting under the truck and on the passengers side it looks like to lines, bigger than fuel lines, and inbetween both passenger doors it leaking on the ground and it looks like it could be antifreeze. I'm putting something down to catch it to see what color it is. when you see the picture look on the cement and theres a puddle where it sits.
 
Well there should be two metal lines for the ac system on the passenger side. And Im not sure if the heater lines would be rubber all the way back or if they are metal too. I know LMC has a good diagram on the lines so you can see what you are looking at.
 
whats LMC as I would like to see the diagram. Also I'm leaking something right between the 1st and 2nd doors on the passenger side. I have no idea what it is as it doesn't smell like fuel as I thought it was a leak in the fuel line.
 
mine didn't have rear heat on the floor when i got it, but there are two rubber lines going all the way to the back, and up into the rear ac venting area, it looks as though a previous owner installed a cooler looking thing in there in front of the ac, when you turn the fan on, it blows through this and sends out the heat. again, believed to be add-on stuff.

The rear AC works all the time basically when you have the front AC turned on, it always pressurizes the rear system, the switch on the dash only controls the air flow speed across the evaporator. Typically when you have the front running, you WANT the rear blowing at least on a low setting.
 
I have those lines and it looks as though the dripping is anti freeze. i need to find out if there is anything near the A/C as it would be nice to have when its cold and it would be nice to figure out how to stop the leak...my biggest pet peave is things on my vehicles that leak. I've got my picture uploaded in the suburban section. It took a while but got it in there.
 
Home-members galleries-BPatrick is where the picture of my suburban is located. I cannot tell you why as I was trying to figure out how to upload the picture as its a first for me. I've never uploaded pictures so the wife and I tried to figure it out but would like to connect it to this link as its the new to me suburban that the thread is about. any help here would be appreciated.
 
Hey Patrick,

Here's how Ive posted pics:
Upload pic to your gallery
Open that pic from your gallery in one window,
Open the post you want to put it in in another window,
Below the pic, there will be two boxes,
Cut and paste the bottom one into your post(bbcode), and WHALLAAHH
Click preview post to make sure that it worked before you post.

Have you figured out if you have rear heater or not? My 87 had the lines, and switch, but it was capped off where the rear heater core / blower should be. I have seen two kinds of rear heaters, not sure what one the 91 would have...Some are in a little plastic box looking thing in the passenger side rear of the truck. Some later models seem to be mounted inside the passenger side fender, with a vent coming out... Here's a pic of the floor mounted box one...

picture.php


There would be separate lines for the heater and A/C, the heater line would be the one leaking antifreeze, The A/C lines would only carry refrigerant. clean up the hoses where it is leaking, and see if there is a junction there, you may be lucky and only have to tighten a hose clamp, or cut a little off the end and reconnect.

The A/C would stick out into the cargo area from the roof when you open the doors, heres what it looks like with all the covers removed...
picture.php



Good Luck!
 
Great Information...I was on the road the last few days and just got back in and am checking emails. I'm going to do some further exploration this weekend...I have to change the front heater core as it's leaking badly.
 
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