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My car 2004 Pontiac gran prix has a loud humming sound when I press brakes and doesn't stop well. Like it slips.

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  • Cars & Trucks Master
  • 17,970 Answers

Check vacuum lines or a problem with the booster or master.

Posted on Nov 04, 2012

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

  • 1201 Answers

SOURCE: how do I change the fuel filter for a 2002 pontiac Gran Prix

Release the fuel pressure by loosening the gas cap, raise and support the car on jack stands,squeeze the plastic tabs on the male end of the connector,and pull the connector apart.Some models have 2 tabs,and others have 1 and the fuel line screwed into the other side.Remove filter mounting bolt,unhook tab from frame and remove filter. when you put in the new filter, make sure the arrow is pointing toward front of engine.On the line with plastic tabs, just push on till you hear a click, then pull on it to make sure it's latched.Don't forget to tighten gas cap.

Posted on Jan 24, 2009

  • 4 Answers

SOURCE: weird noise in front of car

How would changing the rear pads fix a noise in the front? Take the front wheels off and look for excess rust on the discs or grit in or on the pads. It sounds like you might be competent enough to take the calipers off (it's not very hard). If the noise gets louder with speed, it could very well be the bearings. This is much harder to do yourself (yay FWD), and you might want to get it towed so you don't damage the hubs, etc. Just shaking the wheel probably isn't enough to diagnose bad bearings.

Posted on May 11, 2009

  • 451 Answers

SOURCE: How do replace heater core in 2002 Pontiac Gran Prix

i do believe you have to take the passengers side dash apart behind the glove compartment. go to autozone and get a manual or go to the library and check the chiltons manual. this is not an easy job. how bad is the leak? if its not bad these heater cores are made of all aluminum. i would buy a bottle of that radiator additive and see if that takes care of the problem first. it only cost about 5 bucks a bottle and it may permanantly fix your problem.

Posted on Aug 13, 2009

  • 18 Answers

SOURCE: 2008 Pontiac Gran Prix,Radio MP3 line-in/aux-in

The upscale model is the only that i know of that has one. What model do you have?

Posted on Oct 16, 2009

BCAS1298
  • 3092 Answers

SOURCE: leaking water from heater core 1999 gran prix

If leaking coolant under dash on passenger side floor broad it's your heater core. Call's for 2.8 labor flat time to remove heater core, in some case's you'll have to recover, evacuate and recharge your A/C system to remove your heater core.Sit under dash on passenger side.

Posted on Dec 28, 2009

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1 Answer

The brakes on my 2004 Gran Prix make a squeal and the petal goes to the floor when I stop sometimes and then while attempting to drive to work they were doing it none stop. Then the ABS light came on along...


Hi , Sounds like you need new pads on the front. That squealing is a indicator that th brakes need to be replaced. Also you need to check the computer codes for your brakes system. Go to a repair shop for that. Good luck.

Aug 03, 2012 | 2004 Pontiac Grand Prix

1 Answer

2005 pontiac gran prix


start with checking the fuel pressure first

Dec 07, 2011 | 2004 Pontiac Grand Prix

1 Answer

My 2004 gran prix (gtp) just hit 100000 miles. What maintenance needs to be done now?


Spark plugs, transmission fluid and coolant change, supercharger oil, air filter, fuel filter, tires, brakes, engine mounts, BTSI inspection and power steering fluid. Also inspect the belts, hoses, pulleys and look for wiring damage.

Jul 02, 2010 | 2004 Pontiac Grand Prix

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Brake pedal makes grinding noise and bleeds off


double check fluid.you have air or are losing hydrolic pressure somewhere. leak in master cylinder can do this. also vacume and air leak in the booster unit. double check bleading points on each wheel.

Mar 11, 2010 | 2004 Pontiac Grand Prix

2 Answers

Computor shows random misfire, 2004 pontiac gran prix


You may have a jacked up wire... or plug...this happen to me on my 2004 grand prix gtp 2 times...1 time one of my plugs was cracked the 2nd time my plug wire was laying on dip stick and started to melt....each time after replacing the plug and the wire it stopped misfiring...

Jan 04, 2010 | 2004 Pontiac Grand Prix

1 Answer

Low frequency humming noise


sounds like you have a bad bearing buddy.

Dec 16, 2008 | 1999 Pontiac Grand Prix

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Brake lights not working the window brake light works.haz light works.turn signals work it just the rear brake lights


I have the exact same problem on a 2003 Gran Prix GT. All lights including Stop Light works. Brake lights do not. Have you found a solution.

Aug 21, 2008 | 1997 Pontiac Grand Prix

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