1999 Pontiac Grand Am GT Logo

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Posted on Jun 14, 2011
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How much freon does the system hold 99 grand am 4 cly.

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Michael Anderson

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  • Pontiac Master 799 Answers
  • Posted on Jun 14, 2011
Michael Anderson
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Hi, majority of car A/C systems hold about 3 pounds of R134a refrigerant. Mike

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  • Posted on Jul 17, 2018
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The 99 grand am holds 36 oz of freon. The guy Mike that said 3 pounds is a DA and should not be allowed to answer questions

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HI there #1 before you put freon in did use a vacuum pump and pull too the right vacuum
specification if not you have air in the system.
#2 if you put 4 cans of freon you over charged the system must vehicles a/c systems use 1lp 5oz
you must remove freon first and use vacuum pump and put system in vacuum for abut 1hour
too mack shore system is air and muster free.
ones that is don you can charge system be careful not too over charge OK

good luck

ziggyone
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Need a diagram for a 99 grand prix stp A/C system

It would probably be worth while to buy a leak detection kit from your local parts store. The kit includes an injectable dye which you put into the system just like regular 134a through the pressure port. Once the dye is in you use the included UV light to find external traces of dye on the lines to quickly pinpoint your leak. Some do-it-yourself freon canisters have leak sealer in them but be cautious as they may cause further damage.
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