what causes the humming in 2005 grand prix

Asked by Jul 25, 2014 at 10:05 AM about the Pontiac Grand Prix

Question type: Maintenance & Repair

4 Answers

36,455

Your alternator.

4,935

Common whining/humming noises with engine running in neutral are: belts, vacuum leak, bearing, power steering pump, alternator, AC compressor, fuel pump. With car in motion: wheel bearing, CV joint, transmission gear/bearing, tires. Less obvious humming noises: heater fan, wiper motor. If you can give us the source - where the noise seems to be coming from - it will help a lot.

2 of 2 people found this helpful.
20

I hear it on the driver side under hood or in the car . Sounds like it could be electrical . Doesn't do it in park . I have new belts . kinda loud .

1 of 1 people found this helpful.
20

The harder I press the gas the louder . Like its a bad ground for a stereo . I do have a blown speaker I dont know how bad it is . I really want to up the HP on this engine. It does get hot quick I live in Florida . Are there performance parts for a Pontiac 2005 Base model 3800 series 3.8 L . I've heard about bigger injectors ? Is the a chip I can buy to in tune it .

1 of 1 people found this helpful.

Your Answer

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 2,474 nationwide Grand Prix listings starting at $950.

ZIP:

Pontiac Grand Prix Experts

  • #1
    Js08016
    Reputation
    4,470
  • #2
    Tom Demyan
    Reputation
    3,110
  • #3
    munron
    Reputation
    2,550
View All

Related Models For Sale

Used Chevrolet Impala
548 Great Deals out of 33,345 listings starting at $1,981
Used Dodge Charger
454 Great Deals out of 34,582 listings starting at $2,000
Used Pontiac G8
15 Great Deals out of 445 listings starting at $3,500
Used Pontiac Bonneville
444 listings starting at $1,500
Used Chevrolet Monte Carlo
7 Great Deals out of 1,226 listings starting at $1,585
Used Chevrolet Malibu
1,085 Great Deals out of 57,769 listings starting at $995
Used Pontiac G6
38 Great Deals out of 3,864 listings starting at $1,700
Used Pontiac Grand Am
984 listings starting at $2,595
Used Pontiac GTO
8 Great Deals out of 422 listings starting at $4,995
Used Chevrolet Camaro
495 Great Deals out of 30,908 listings starting at $995
Used Ford Mustang
425 Great Deals out of 41,424 listings starting at $1,488
Used Nissan Maxima
347 Great Deals out of 20,620 listings starting at $1,175
Used Chrysler 300
375 Great Deals out of 19,024 listings starting at $2,200
Used Pontiac Firebird
8 Great Deals out of 723 listings starting at $1,649
Used Dodge Challenger
255 Great Deals out of 25,519 listings starting at $7,872

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.