What did you do to your OBS GMT400 Tahoe/Yukon Today?

[Tonyrodz]

Damn. Im really hoping its a fitting or hose or something. Not seeing anything obvious though and its definitely leaking somewhere... Ill have to look closer at the compressor. I'm surprised to have this problem on such a low mileage truck despite its age. Its only got 65k miles...

Rubber deteriorates.

 

[96-2D-Hoe]

Damn. Im really hoping its a fitting or hose or something. Not seeing anything obvious though and its definitely leaking somewhere... Ill have to look closer at the compressor. I'm surprised to have this problem on such a low mileage truck despite its age. Its only got 65k miles...

There's only 5 fittings, in and out of the condensor behind the front grille, in and out of the evaporator at the drier, and the manifold at the compressor. The high side quick connect on the manifold is prone to leaking, mine does, but also the low side could leak and there's another schrader fitting on the drier. Apart from that some trucks have had issues where battery acid leaked onto the line that runs past the battery from the condenser to the drier and corroded it. AS I already mentioned oil will come out where it's leaking. I can't actually see any oil on mine, but the compressor leaks in the center. You could have a leak in the evaporator coil or condenser coil but it's unlikely. My money is on the compressor

Edit: Could also be leaking from the high and low pressure switches. The high is on the drier, schrader valve I mentioned, and the low is on the back of the compressor.

 

[homesick]

I replaced the aluminum wheels with the old factory Rallye steel wheels.today.

joe

 

[PG01]

I replaced the aluminum wheels with the old factory Rallye steel wheels.today.

joe

View attachment 222786 View attachment 222787

As much as i like the rallye’s i like the original alum’s on your truck but hey, who the f am i... it’s your truck. If you like, thats all that matters...lfted k5’s with rallye’s, raised white letter bfg’s .....that was a good looking combo tho....always loved that.

 

[homesick]

As much as i like the rallye’s i like the original alum’s on your truck but hey, who the f am i... it’s your truck. If you like, thats all that matters...lfted k5’s with rallye’s, raised white letter bfg’s .....that was a good looking combo tho....always loved that.
View attachment 222791

I had an '87 K5. I still miss that truck. It had that look, and I agree with you- it's a great look.

joe

 

[dkknaebel]

Well dang, what haven't I done to the ol' girl lately. Let's see. New distributor, cap & rotor and now all my weird electric gremlins and weird idle is gone. No more dancing tach! We decided to tackle the rear brakes. Put in my VIN and figure out which rear end I have according the RPO codes and order my rear shoes, drums, wheel cylinders, hardware kits, dif cover gasket and axle seals. Ordered them in March, finally get around to it last week. Start pulling everything apart. Stop and do a double check. Well hot damn, these drums look a little bigger than the 10 inch ones I ordered. Someone had switched out my rear end and I have 11 inch brakes in the back. Off to Advance I go to get all the correct stuff for it. Good thing, the axle seals weren't leaking though. And I finally got some advice on how to get the third blender door actuator out of my truck on the far passenger side so hopefully I'm going to have a/c soon!

 

[willxfs]

Dkknaebel, do you have the 14 bolt rear end (as opposed to the 10 bolt, I think). If so, that's a very nice upgrade. You get the much stronger rear end and 11 inch brakes vs the 10 inch.

 

[dkknaebel]

Dkknaebel, do you have the 14 bolt rear end (as opposed to the 10 bolt, I think). If so, that's a very nice upgrade. You get the much stronger rear end and 11 inch brakes vs the 10 inch.

You'd think I'd know the answer to that....Let me check some photos. Nope, no photos of the underside. i believe it is just the 10 bolt.

 

[the 18th letter]

How difficult is changing power steering pressure line hose on a 99 Yukon? Looks straightforward but I've learned not to always judge a book by its cover. Need something to do this coming weekend that wont actually take all weekend.

 

[the 18th letter]

Got my A.C back feels like it's been years. Well, it has since I garaged her for a while. Forum doesn't get much traffic anymore I see, smh.

 

[homesick]

As much as i like the rallye’s i like the original alum’s on your truck but hey, who the f am i... it’s your truck. If you like, thats all that matters...lfted k5’s with rallye’s, raised white letter bfg’s .....that was a good looking combo tho....always loved that.
View attachment 222791

I've realized since I made the change that part of the reason (to me, anyway) the old Rallyes look better is that they're deeper.

joe

 

[PG01]

I've realized since I made the change that part of the reason (to me, anyway) the old Rallyes look better is that they're deeper.

joe

Weird, i was looking at that pic of your truck a few days ago and thought the same....

 

[homesick]

Weird, i was looking at that pic of your truck a few days ago and thought the same....

The powdercoater took it upon himself to add some metalflake on these wheels. It doesn't show in this picture, but the wheels come alive in bright sunlight. It was a very nice added touch. I called last week and thanked them for doing it.

LOL The deeper style, like my '87 K5 had, would still look better though, especially with the flake.

joe

 

[TheAutumnWind]

Got my A.C back feels like it's been years. Well, it has since I garaged her for a while. Forum doesn't get much traffic anymore I see, smh.

There is more action on the parts of the forum dedicated to the more modern vehicles unfortunately. I am going to be trying to get my ac working again soon too. Gotta handle my stalling in the heat problem first. I'm thinking icm...

 

[TheAutumnWind]

There's only 5 fittings, in and out of the condensor behind the front grille, in and out of the evaporator at the drier, and the manifold at the compressor. The high side quick connect on the manifold is prone to leaking, mine does, but also the low side could leak and there's another schrader fitting on the drier. Apart from that some trucks have had issues where battery acid leaked onto the line that runs past the battery from the condenser to the drier and corroded it. AS I already mentioned oil will come out where it's leaking. I can't actually see any oil on mine, but the compressor leaks in the center. You could have a leak in the evaporator coil or condenser coil but it's unlikely. My money is on the compressor

Edit: Could also be leaking from the high and low pressure switches. The high is on the drier, schrader valve I mentioned, and the low is on the back of the compressor.

Thanks I have not gone back to mess with this yet but I may use it for reference.
I can't see any obvious leaks I'll have to add some more and some UV liquid so I can find it.

I'm gonna be messing with it soon bc it's getting quite hot here. Over 100 the last several days.

 

[Shadowz Edge]

Nothing today except trying to figure out how I'm going to convert my front split bench to single buckets without much hassle in my OBS 99 Tahoe

 

[Macks2DrTahoe]

I've been hitting the salvage yards to find parts to support my 2 door Tahoe manual to power window conversion.

 

[TheAutumnWind]

I've been hitting the salvage yards to find parts to support my 2 door Tahoe manual to power window conversion.

I really wish i had a good yard close by and the time to peruse. I'd love to find a 60/40 bench from a newer truck with an armrest for my rcsb.

 

[TheAutumnWind]

There's only 5 fittings, in and out of the condensor behind the front grille, in and out of the evaporator at the drier, and the manifold at the compressor. The high side quick connect on the manifold is prone to leaking, mine does, but also the low side could leak and there's another schrader fitting on the drier. Apart from that some trucks have had issues where battery acid leaked onto the line that runs past the battery from the condenser to the drier and corroded it. AS I already mentioned oil will come out where it's leaking. I can't actually see any oil on mine, but the compressor leaks in the center. You could have a leak in the evaporator coil or condenser coil but it's unlikely. My money is on the compressor

Edit: Could also be leaking from the high and low pressure switches. The high is on the drier, schrader valve I mentioned, and the low is on the back of the compressor.

Was leaking at the Schrader valve high side. Got that to seal. Gets nice and cold now but looks like it could be leaking at the compressor.

 

[96-2D-Hoe]

Glad to hear you got it working. Not unusual for the compressor to leak a little. If it lasts a season you're golden