Suspension Related Noise
WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
Special Tools
CH-39570
Chassis Ear
Equivalent regional tools: Special Tools .
| Condition |
Action |
| Verify the customer complaint |
Test the vehicle on a shop hoist or road test.
It may be necessary to compare to a like vehicle to determine if an issue is present.
NOTE:
If a symptom exists, related to, but not included in the customer complaint, refer to the appropriate symptom chart.
Symptoms - Suspension General Diagnosis |
Noise changes with vehicle speed.
NOTE:
Typical noise examples include rub, chirp, scrape, whine, or squeal.
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- Attach CH-39570
Chassis Ear nearest the estimated noise origin, check, adjust, and repeat until area of noise source is captured.
- Check tire pressure, adjust, or repair as necessary.
- Inspect tires for signs of excessive/abnormal/uneven wear, repair or replace components as necessary and tighten to correct specification.
- Inspect wheels and wheel trim for signs of excessive brake dust or dirt buildup and perform brake inspection as necessary. Symptoms - Hydraulic Brakes
- Inspect the wheel nuts for looseness and signs of rubbing/wear at the wheel-to-nut mating surfaces, repair or replace components as necessary and tighten to correct specification.
- Inspect wheel bearings for looseness, conduct wheel bearing diagnosis if necessary. Wheel Bearings Diagnosis
- Visually inspect rotational driveline component mating surfaces for signs of rubbing/abnormal wear indicating interference, repair or replace as necessary and tighten to correct specification.
- Visually inspect areas surrounding rotational assemblies such as wheels, tires, or axles for loose/suspended objects such as labels, conduit, or harnesses that could make contact during vehicle operation.
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Noise changes with vehicle jounce, tilt, or cornering.
NOTE:
Typical noise examples include rub, thud, scrape, rattle or squeak.
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NOTE:
Failure of one shock/strut does not indicate condition of others in the system. Shocks/struts are designed and intended to operate independent of each other, and should be diagnosed/addressed individually to minimize unneeded repairs.
- Attach CH-39570
Chassis Ear nearest the estimated noise origin, check, adjust, and repeat until area of noise source is captured.
- Perform Suspension Strut and Shock Absorber Test at corner nearest noise source. Suspension Strut and Shock Absorber Testing - On Vehicle
- Inspect fasteners and bushings in area of noise for signs of wear/ looseness/damage, repair or replace subject fastener/component as necessary and tighten to correct specification.
- Inspect area of noise for any loose or damaged shields, repair or replace as necessary and tighten to correct specification.
- Inspect wheels and wheel trim for signs of excessive brake dust or dirt buildup and perform brake inspection as necessary. Symptoms - Hydraulic Brakes
- Inspect the wheel nuts for looseness and signs of rubbing/wear at the wheel-to-nut mating surfaces, repair or replace components as necessary and tighten to correct specification.
- Inspect wheel bearings for looseness, conduct wheel bearing diagnosis if necessary. Wheel Bearings Diagnosis
- Perform Trim Height Inspection, repair as necessary. Trim Height Inspection
- Inspect individual shock/strut in area of noise for signs of external damage or looseness, repair or replace component as necessary and tighten to correct specification.
- Inspect each shocks/strut individually for signs of fluid leakage, replace subject damper as necessary and tighten to correct specification. Suspension Related Leaks
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| Verify conducted repair alleviated customer concern. |
Re-test the vehicle on a shop hoist or road test and inspect for evidence of returning condition. |