Question about 1999 Pontiac Grand Am GT

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I need to find the leak in the a/c system of a 99 grand am Se 3.4 .Also a schematic of that system would be great and any remove and replace info also. thank you

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  • jcord8 Jun 06, 2009

    hey thanks a lot for the info.I'll try that.sure could use some schematics in case I have to do major work on the system



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What I do at home is get water with soap in it then use a sponge or cloth to wipe the mixture along the vacuum hoses and pipes to check for bubbles which means leaks. I will see if I can get a schematic diagram

Posted on Jun 04, 2009


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How do you change a starter for a 99 grand am se? Do you have any schematics that illustrate?

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  3. Clean the mating surfaces.
Installation Procedure


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  2. Install the thermostat housing.
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If you are talking about 99 Pontiac Grand Am, I have the information you need with drawings. If you send me your email address I will send you the info you need.

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You can generally find a vaccum leak by pressure testing the system. Most auto parts stores sell a vaccum tester relatively cheap. Or you can take it to a shop and they will pump your sytem full of a uv sensitive die and then use a black light to find the leak. If it says vaccum leak at engine on the vent solenoid then all you need is the schematic of your vaccum system to find the solenoid and you should find your leak theoretically.

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