Question about 1999 Pontiac Grand Prix

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Vehicle A/C makes a continuace loud squealing noise

My 1999 Grand Prix GTP makes an awful squealing noise when the air conditioner is on. It used to stop after a bit, but now is continuace and never stops.

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Check your belt tension. Tighten it up and the noise should go away. if not, replace the belt and tension it accordingly.

Posted on Jun 02, 2009

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Posted on Jan 02, 2017

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2 Answers

1999 pontiac grand prix gt squealing very loud when it hits operating temp


Check your power steering fluid , or you serpentine belt an tensioner !

May 29, 2015 | 1999 Pontiac Grand Prix GT

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My 1999 Grand Prix GTP won't start after changing


Double check the wiring harness to make sure it did not get pinched under the manifold or the top cover. It is common for a single wire to get pinched and shorted and cause this.

Oct 31, 2012 | Cars & Trucks

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I have a 1997 pontiac grand prix gtp and on the supercharger nose cone pully its making a really loud squealing noise and doesnt go away and it gets louder the faster it goes. I spray like a lubricant like...


THE FRONT BEARING IN THE SUPERCAHRGER HAS GONE BAD. DO NOT DRIVE IT TIL' IT IS FIXED.
YOU WILL GET STRANDED AND MAYBE RUIN THE ENGINE IF PARTS GET SUCKED IN THE INTAKE.
ROBERT

Nov 01, 2010 | Pontiac Grand Prix Cars & Trucks

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I have a 97 grand prix gt with the same problem


that car should do every bit of 132mph . if it doesn't then try a tune up or there could be a lot of possibilities like
fuel flow , air flow ,
transmission and even the type of oil that you use .

Jul 19, 2009 | 1999 Pontiac Grand Prix

2 Answers

1999 Grand Prix GTP. Catalytic convertor fine.


Make sure it always gets premium fuel...even with premium and especially in warmer weather the GTP will frequently perform the factory programmed KR (knock ******.) In WOT it is also more susceptible to running a lean condition with stock programming.
Things you can do to troubleshoot the problem and give more consistant performance with the GTP is run colder range copper core plugs and/or any brand of cold air intake, or even a stand alone 9" open element cone filter. Both are better than stock and provide more airflow even though the stock airbox was redesigned in '99. What else you can do is not limited to that but a start. Good luck.

Mar 08, 2009 | 2000 Pontiac Grand Prix

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1997 grand prix gtp starter location


at rear bottom of engine, u must change it from the bottom. Make sure the battery is disconnected before u start work.

Jan 15, 2009 | 1997 Pontiac Grand Prix

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