Question about 1997 Chevrolet Blazer

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None of my vents open but I can hear the fan working. what seems to be the problem? I can't get to the valves that work by vac.

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  • Chevrolet Master
  • 5,568 Answers

Your problem is probably caused by a vacuum hose (under the hood) which has cracked or fallen off or, as I once found on a new GM rental car, the vacuum reserve canister was (is) defective.
The reserve canisters can have any shape but from the volume, it will be between a pint and a quart capacity and have one or two hoses attached to it that come from the area of the intake manifold.

Posted on Sep 23, 2009

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  • Contributor
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The chances of all of the vacuum solenoids failing are next to none. Ensure that you have not broken the vacuum line somewhere down the line. This would allow all vacuum to escape and would cause the problem that you posted.

Posted on Sep 23, 2009

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