Squeaking while driving over bumps?

2002 GMC ENVOY

250,000 MILES • 4.6L • 6 CYL • 4WD • AUTOMATIC

WJORDAN01

MEMBER
2 POSTS

Just recently my vehicle has started squeaking while driving over bumps, 30 MPH or faster.
Brakes are new and the squeak doesn’t change when I brake.
I replaced the torsion bar bushings, which fixed a minor clunk I had been hearing on and off for over a year.
No sounds when turning tight or turning the steering wheel back and forth.
Everything else looks fine, nothing super loose and no obvious damage to be seen.
I’m thinking pully, but would like to know if anyone else has this problem and save me some time before I begin the process.

Aug 4, 2023 at 7:06 PM

JACOBANDNICKOLAS

✓ASE Certified Mechanic
110,194 POSTS

Hi,

If it is happening when going over bumps, are you able to reproduce it by bouncing the front of the vehicle?

If so, have a helper bounce it while you check to see if there is noise from the sway bar bushings, ball joint, control arm bushing, or shock. See pic below

Let me know what you find.

Take care,

joe

See pic below.

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Aug 4, 2023 at 10:38 PM

WJORDAN01

MEMBER
2 POSTS

I had to really jump on the bumper, but I was able to get a similar sounding squeak out of the front suspension, thanks.

Aug 5, 2023 at 7:40 AM

JACOBANDNICKOLAS

✓ASE Certified Mechanic
110,194 POSTS

Hi,

Thanks for the update. If you heard it when bouncing the vehicle, it is likely either a bushing or ball joint.

Let me know if I can help.

Take care,

Joe

Aug 5, 2023 at 11:17 PM

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