(leak) can someone help me ID this hose?

[SnowDrifter]

It's in the negatives and snowy and crappy outside right now. Really trying to avoid crawling on the ground to trace it. Want to get the parts ordered so I can fix it when I go back for spring break.

It's at the airbox looking down

'05 Tahoe LT w/ tow package and hydroboost brakes. 5.3 gas

 

[RED TAHOE LS]

With tow package, it looks like a auxiliary cooler line for the transmission.
David g..............

 

[Rocket Man]

I agree^^^^^. What kind of fluid is leaking?

 

[Doubeleive]

if it is on the passenger side then it is transmission cooler line, if it is on the drivers side then it is a oil cooler line, but looks like it is running up from the ac compressor area, you can just replace it with a oem one or cut it and patch with another hose and clamps, it is not a high pressure line so regular hose will work fine.

slim chance but if it is on the drivers side it could be a power steering cooler line also.

 

[RED TAHOE LS]

Gotta agree with you , real close to r/side frame and a/cleaner box/duct to r/fender.
David g...........

 

[Rocket Man]

After looking at it on my PC where I get a better view, it definitely looks like the lower trans cooler line. The upper trans cooler line can be seen right next to it and that one enters the radiator on the upper passenger side. The lower line enters on the bottom passenger side. The upper trans line is pretty much impossible to replace without lowering the trans but the lower one is possible but where it enters the trans is still hard to get to. Practice on the quick-release fitting up by the radiator before trying the one on the trans. There's a plastic ring that pulls back to expose the clip. The clip needs to be pulled back with a small pick or similar and removed. Buy some spares at the auto parts store first because you'll probably have one pop off and fly away. They sell a variety pack of Dorman ones. When installing, install the spring clip onto the fitting first, then just push the line in until it clicks. Give it a tug to be sure it's connected good. Then slide the plastic protector over the clip. It may not be high pressure, but if a hose comes off your trans will probably blow due to loss of all it's fluid before you know what happened. Just ask @Tonyrodz . I would replace the entire line and not depend on clamps and a hose patch but that's me. I don't want to risk a blown trans. The new line is pretty cheap. In the picture, you can see the spring clip in the fitting and in this position it needs to be pulled downward. That tan-ish thing is the plastic protector ring that pulls off with your fingers.

 

[Rocket Man]

Here's the clip.

 

[Tonyrodz]

Make sure you fix it the right way, or you'll def regret it.

 

[SnowDrifter]

Make sure you fix it the right way, or you'll def regret it.

Yessir. I intend to replace the whole line, just need to know what to order. I'm not one for half ass fixes

 

[SnowDrifter]

I agree^^^^^. What kind of fluid is leaking?

You're going to laugh at me... But it's not leaking enough for me to even tell. Can't get a scratch n' sniff off the thing. It's just oily.

 

[Rocket Man]

Yessir. I intend to replace the whole line, just need to know what to order. I'm not one for half ass fixes

https://www.rockauto.com/en/moreinfo.php?pk=990779&cc=1431156&jsn=590
That is the lower for a 5.3 but check your VIN and match it up.

 

[Sgtduckyboy]

You're going to laugh at me... But it's not leaking enough for me to even tell. Can't get a scratch n' sniff off the thing. It's just oily.

is there a chance its 'oily' from blowback fluid from another line? is there any leaking above it or in front of it? tranny fluid is usually easy to tell, if its 'oily', and you cant determine its tranny fluid, sounds to me, like some more looking around is in order, especially if your tranny fluid level is ok and its not needing frequent topping off.

 

[Scottydoggs]

Here's the clip.

if you use a quick disconnect tool that clips can stay in place and it wont have a chance it of flying and getting lost, if you dont have the tool and pull the clip, put it back in first, then push the new line in through it till it clicks, then tug back on it.

the line has what looks like a dick head, the clip locks behind the head so to say lol

 

[SnowDrifter]

Leak got worse since I posted and I managed to wiggle my phone camera down in there to do a little trace. Transmission line for sure

Going to replace all 3 lines and be done with it. Just ordered parts. Thanks for the help!

 

[Rocket Man]

Leak got worse since I posted and I managed to wiggle my phone camera down in there to do a little trace. Transmission line for sure

Going to replace all 3 lines and be done with it. Just ordered parts. Thanks for the help!

FYI you won't be ale to get to the connector on the upper line where it goes into the trans unless you drop the trans down a few inches. That's a lot of work. I wouldn't change it unless it's leaking.

 

[SnowDrifter]

Could you confirm? Labor times for each of the transmission lines are only .9 hours, with the cooler->rad line being .6

 

[Rocket Man]

Could you confirm? Labor times for each of the transmission lines are only .9 hours, with the cooler->rad line being .6

I replaced my lower with the trans in place and was barely able to get a pick in there to remove the c-clip. I could barely even see the upper one, much less remove the clip. Then when you have to reinsert the clip before pushing the line back in, you'll need to put it in a pair of needle nose pliers and re-orient it a few times , drop it a few times, and cuss a lot. It will take all your concentration. And that's the easy lower one. When I replaced my trans a few months later I was able to get the upper line off only after I had lowered the trans quite a bit. If you have access to ramps or jack stands, go under there and have a look. I guarantee even the lower line will have you cussing for a long time.

 

[SnowDrifter]

Just finished. Not really a bag job TBH. Just need a right angle hose pick

Pop the air box out, front grille off. On the trans, remove the passenger side heat shield - 2 10mm bolts. Gives you all the room you need. Reach in from the back and you can get to the connectors easy

As far as getting the lines out, loosen/remove the passenger side diff mount, let it droop, the pull the lines forward. Front valence is pretty soft and will push up out of the way. All and all, it's about a 2 hour and 15 minute job ground to ground to do all 3

Parts:
ACDelco 15809058
ACDelco 15809053
ACDelco 15773661
Splash of ATF and a bunch of rags

 

[swathdiver]

As far as getting the lines out, loosen/remove the passenger side diff mount, let it droop, the pull the lines forward.

Great idea!