thumping sound when driving, and cooling fans wont turn on

Asked by Jan 24, 2016 at 12:55 AM about the 2001 Pontiac Grand Am SE

Question type: Maintenance & Repair

When driving my 2.4  grand am theres a thumping sound
coming from the front or back right tires i dont know which
one but the thumping sound comes and goes,  and the
cooling fans will turn on if the ac is on and my papa and i
connected them to the battery and they clicked on and took  
it to auto zone and they just took out the relays and
switched them and they still didnt run if any one could help
thatd be great thanks!!!

1 Answer


The fans will come on when the AC is on. It is designed that way. If they don't come on at any other time, I would first make sure your engine is getting hot enough to turn them on. Have you had any overheating issues that would indicate they are failing or does your temp stay in the normal range when you drive? I don't know about the thump you describe but you may want to inspect your tires on that side and look for distortions in the tread or bubbles on the sidewalls.

1 of 1 people found this helpful.

Your Answer

Pontiac Grand Am Experts

  • #1
  • #2
    John Saffrahn
  • #3
    Tom Demyan
View All

Related Models For Sale

Used Pontiac Grand Prix
1,896 listings starting at $3,000
Used Pontiac Firebird
5 Great Deals out of 656 listings starting at $4,999
Used Ford Mustang
294 Great Deals out of 38,678 listings starting at $1,995
Used Chevrolet Malibu
635 Great Deals out of 48,775 listings starting at $1,500
Used Chevrolet Camaro
257 Great Deals out of 30,437 listings starting at $4,200
Used Chevrolet Impala
370 Great Deals out of 27,543 listings starting at $1,499
Used Chevrolet Corvette
100 Great Deals out of 15,820 listings starting at $4,500
Used Honda Accord
565 Great Deals out of 92,859 listings starting at $1,495
Used Pontiac Bonneville
342 listings starting at $2,000
Used Nissan Altima
816 Great Deals out of 68,083 listings starting at $750

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.