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Discussion Starter · #1 ·
My 2008 trailblazer 4.2 L makes intermittent vacuum sound from the pipe coming out of the air filter housing with the engine turn off. When I go inside the cabin I can barely hear it so I do not think it is the heater or AC fan. Does anyone have any idea what this is. It also drains the battery as it comes on every few minutes.
ted
 

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2021 LT AWD
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You may want to check trailvoy.com or gmtnation.com for your generation of Trailblazer. This forum is geared towards the 2021 and 2022 models. There is lots of good info at either on of them.
 

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Discussion Starter · #3 ·
You may want to check trailvoy.com or gmtnation.com for your generation of Trailblazer. This forum is geared towards the 2021 and 2022 models. There is lots of good info at either on of them.
You may want to check trailvoy.com or gmtnation.com for your generation of Trailblazer. This forum is geared towards the 2021 and 2022 models. There is lots of good info at either on of them.
Thankyou I am now informed
 
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