Mystery line

[becks]

Ok so I was cleaning the throttle body on my 06 envoy i6 and I touched a plastic line that snapped. It was very brittle I assume from heat. I have no idea what it does. It comes from the cab through the firewall right next to a relay. It then travels behind the beauty shroud and goes along the head then enters the intake. Any idea or do I need pics?

 

[xavierny25]

Pic's would help us help you as well as some info on your Envoy XL.

 

[becks]

Here is where it goes into the intake.

 

[smt 59]

Pics please

 

[becks]

It doesn't go into the cab either, it disappears behind the coolant tank.

 

[smt 59]

What year is your truck?

 

[becks]

06

 

[Mounce]

IIRC that goes to a valve on the firewall that turns coolant flow on and off going to the rear heater core depending upon hvac settings. Vacuum supply to a vacuum operated valve. That's if it is indeed an xl.

 

[smt 59]

IIRC that goes to a valve on the firewall that turns coolant flow on and off going to the rear heater core depending upon hvac settings. Vacuum supply to a vacuum operated valve. That's if it is indeed an xl.

agreed, that fact that this hose is there indicates a LWB and need's replacing for proper operation.

 

[djthumper]

while waiting for your replacement you may be able to slip both ends into a small piece of rubber tubing.

 

[becks]

It is a xl. Funny cause that was my next job on it, to figure out why the rear hvac was blowing cold all the time! Thanks guys!!

 

[smt 59]

This is the place to be.

 

[jsheahawk]

Two birds, one thread.