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Old 05-21-2012, 09:31 AM   #1
chevy4life02814
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Location: chepachet, rhode island
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Vacuum Issue?

no defrost on 87 r10, kinda here a hissing in the cab when i switch controls to the defrost. i assume its a vacuum line but not sure where to check. i don't wanna just start tearing things apart. is it behind the glove box? or do i have to get behind the the the switches? also, can some one tell me what this vacuum line went to in the picture. someone just capped it off. thanks again...
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Old 05-21-2012, 10:03 AM   #2
chevy4life02814
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Re: Vacuum Issue?

ok, started getting into the dash, a couple issues. seems like where the vacuum line plug into the back of the thermostat controls isn't completely sealing, hearing a slight hiss, if i push it in harder and hold it, it quiets down. also it looks like a line is missing. is this for anything or not?
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