Wierd Noise Under Dash

[tjewell71]

Hi, I have an 05 GMC Sierra Z71 and when I give it gas I hear a noise almost like a bubbling sound coming from under the dash arround the floor board. Can anyone help?

[txab]

Have you checked your coolant level? If you're low you can sometimes hear gurgling from the heater core

[Zembonez]

You have air in the cooling system. It'll gurgle in the heater core.

[tjewell71]

You have air in the cooling system. It'll gurgle in the heater core.

 

 

How do I get the air out?

[Jsdirt]

Just add coolant to the proper level. Simple as that. Wouldn't hurt to squeeze the hoses a few times to burp the air out after you fill it up, & run it with heat on high.

 

A few heat/cool cycles will get the rest out.

[tjewell71]

Just add coolant to the proper level. Simple as that. Wouldn't hurt to squeeze the hoses a few times to burp the air out after you fill it up, & run it with heat on high.

 

A few heat/cool cycles will get the rest out.

 

 

Thanks, I will try that.

[Zembonez]

Just add coolant to the proper level. Simple as that. Wouldn't hurt to squeeze the hoses a few times to burp the air out after you fill it up, & run it with heat on high.

 

A few heat/cool cycles will get the rest out.

 

 

Thanks, I will try that.

 

I've had success filling through a disconnected heater hose. It goes directly into the core. Sometimes a pocket of air is hard to get out!

[txab]

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