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2002 chevy trailblazer_ltz
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6 Posts
Discussion Starter · #1 ·
This weekend I lost about a gallon of antifreeze to the garage floor but I couldn't find the source of the leak. I took it to a shop that has worked on my 2002 TB a few times before and he tells me I need a hose replaced. The only thing is that the repair manual calls for them to drop the transmission to replace this hose, meaning $600 labor to replace a $60 hose. He says that this particular hose is rubber with a metal piece next to the engine and it is this metal piece that has failed. Does this sound right and if so is there any way to get around removing the transmission to change this hose? I saw the sticky on changing hoses but I didn't see anything about removing the transmission.

Thanks in advance
 

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2004 gmc
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26,436 Posts
If you could fill out your profile, I wouldn't have to ask if you have an EXT or a short wheelbase vehicle. Did the mechanic say where the hose went? If you have an EXT it could possibly go to the rear HVAC unit.

Looking in my shop manual, though - I do see a hose to the front cabin heater core that goes around the back of the engine, and it does say to remove the transmission to change it! It must be a very, very tight fit back there, and I don't recall anybody in four years mentioning this sort of repair project.

You could get a HVAC specialist to look at the vehicle to see if they could fabricate an alternate routing for this hose that might be longer, but which could avoid removing the transmission. That's what I would do if faced with such a problem. Get creative with a non-GM-designed solution.

I've never heard of such $&*#, I would tell him in no uncertain terms to kiss my @$$!!:m2:
Sez the guy without a shop manual to consult. Better clean up. I've got a mechanic holding on line 2 for some sort of butt-kissing appointment.
 

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2002 chevy trailblazer_ltz
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6 Posts
Discussion Starter · #4 ·
If you could fill out your profile, I wouldn't have to ask if you have an EXT or a short wheelbase vehicle. Did the mechanic say where the hose went? If you have an EXT it could possibly go to the rear HVAC unit.

Looking in my shop manual, though - I do see a hose to the front cabin heater core that goes around the back of the engine, and it does say to remove the transmission to change it! It must be a very, very tight fit back there, and I don't recall anybody in four years mentioning this sort of repair project.

You could get a HVAC specialist to look at the vehicle to see if they could fabricate an alternate routing for this hose that might be longer, but which could avoid removing the transmission. That's what I would do if faced with such a problem. Get creative with a non-GM-designed solution.
Sorry about the profile, done and done. Thanks for looking and the suggestions. The whole engine compartment seems pretty compact but I'm sure there are other ways to route that hose, if it is the one in question.
 

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2002 chevy trailblazer_ltz
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Can you tell us which hose?Is the one the roadie said or a different one?I did the radiator ones with out dropping the trans.But I did have some problems attaching the hose to the water pump!I had to heat it up to slide it on(very tight fit).
 

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Can the mechanic see and get to the hose where it fits on the heater without removing the transmission? It might be mission impossible but then again it might be doable but not a fun job. I replaced a heater hose that I could barely get my arm between the engine and firewall. The old hose had to be cut lengthwise with a knife to get it off the heater tube with a long screwdriver to pry it off. Then pliers were used to push the hose on the tube and then a 1/4" ratchet, extensions and a socket were used to get a clamp positioned and tightened. The clamp was not easy either. I lost a little hide over this but I'll trade some skin for $600 any day.:D
It was my wife’s car and she kept coming home with a "low coolant" light but it didn't leak when parked. I finally found the leak when I had her stop in the driveway.
 

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2004 chevy trailblazer_lt
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3,242 Posts
Welcome to the Forum!

I don't know if any of the above posters are still active on this forum. However, I am aware of this problem and my solution is to get a section of heater hose that is long enough, connect one end to the engine block fitting and then run the heater hose over the top of the engine and then connect it to the heater fitting. This way you can leave the old hose assembly in place. Be sure to use a good quality heater hose such as Gates.

Good Luck!
 

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2008 Chevy Trailblazer LT
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7 Posts
I appreciate That so very much, and that was exactly what I was Thinking of doing. The design Is horrible and very hard to find videos for trailblazers especially 2008....on this problem.
So I appreciate Your time and brain storming!
You have a great night and I post How all works after I fix This week. 😊😃
 

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2004 chevy trailblazer_lt
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3,242 Posts
Good Luck. I've been thinking about doing this for the last few years on my 04 TrailBlazer. Seems to be the least expensive, least labor intensive and most reliable way to replace that confounded rubber & metal hose that bolts to the rear of the block.
 

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'05 Chevy TB EXT
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5,673 Posts
They make these vehicles so the average person can’t fix no more. As if we don’t spend enough money as It Is. 🤦🏼‍♀️
Ya know --- that's not really true.

The designs are dictated by what the public will buy, style-wise, creature comfort-wise and fuel economy-wise. Then there's the law about saving the life of the average idiot who won't wear seat belts to keep from being mutilated by the vehicle they were sitting in when it rolled and tossed them out the windshield.

So - I beg to differ that these vehicles are made to taunt you or mechanics or hobbyists - they are built this way because they are trying to shove some reliability into a smaller and smaller package and yet keep driveability and performance to a max.

No company designs vehicles to disgust customers. That's counterintuitive.
 

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2008 Chevy Trailblazer LT
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7 Posts
Well I agree Some of that but what does a $26 heater core hose, have to do with the safety etc and the only way to replace It Is by dropping the transmission to do so, which taking It to a mechanic costs $800-$1000....or coming up with a different design yourself to do It....

that to me has nothing to do with the things you said. They could of put that in another place or made the hose more flexible to just follow It around or where you can remove certain pieces....or at least make the rubber areas of the hose replaceable versus 🆚 making you replace the entire hose.

so I disagree To a point as well....
 

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2004 chevy trailblazer_lt
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2004 chevy trailblazer_lt
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3,242 Posts
de nada!
 
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