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1997 sts a/c

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have 1997 sts.the a/c blows cold but will switch from blowing in your face to all other vents.still blowing strong and cold???tried changing comtrol panel ,andmechanic to told me to try the a/c pressure switch (behind glove box) witch i did and still did not work. checked codes and gave them to mech. thats when he said try pressure switch.After changing switch only 1 code changed it went from IPC b1552 history to NO IPC codes??? pls any help would be great.I have another car same year so have access to parts to try maruca601@comcast.net thx bob

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Vacuum leak. Start by checking the parking brake release diaphragm. I think that is where KHE is headed.

That or the vacuum tank/line that is under the battery tray.

'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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