Noise Diagnosis - Front Suspension

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.

Special Tools

CH-39570 Chassis Ear

For equivalent regional tools, refer to Special Tools .

Step	Action	Yes	No
DEFINITION: Any noise emitted from the front of the vehicle that is induced by VEHICLE SPEED or DRIVING TERRAIN as related to the front suspension.
1	Did you review the General Description and perform the necessary Inspections?	Go to Step 2	Go to Symptoms - Suspension General Diagnosis
2	Attempt to duplicate the condition. Road test the vehicle. Did you duplicate the condition?	Go to Step 3	System OK
3	Is the noise reactive to vehicle load or speed?	Go to Step 4	Go to Step 7
4	Inspect the tires for the following condition: Proper tire inflation and adjust as necessary - Refer to Vehicle Certification, Tire Placard, Anti-Theft, and Service Parts ID Label . Unusual tire wear. Inspect the wheel nuts for looseness and tighten as necessary - Refer to Fastener Specifications . Did you find and correct the condition?	Go to Step 14	Go to Step 5
5	Inspect the front wheel bearings. Refer to Wheel Bearings Diagnosis . Did you find and correct the condition?	Go to Step 14	Go to Step 6
6	Inspect for front axle or transmission noises: Automatic Transmission - MH7, refer to Symptoms - Automatic Transmission Did you find and correct the condition?	Go to Step 14	Go to Step 7
7	Bounce the front of the vehicle in order to duplicate the noise. Did you duplicate the noise?	Go to Step 8	Go to Step 9
8	Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Inspect the front suspension components for looseness. Refer to Fastener Specifications . Inspect the front suspension components for damage and repair as necessary. Did you find and correct the condition?	Go to Step 14	Go to Step 9
9	Bounce the front of the vehicle in order to locate the source of the noise, preferably by using the CH-39570 chassis ear or equivalent. If necessary, road test the vehicle. Repair or replace any defect components as necessary. Did you find and correct the condition?	Go to Step 14	Go to Step 10
10	Inspect the ball joints and steering components for the following conditions. Lack of lubrication where applicable Looseness in the ball joints Looseness in the tie rods - Refer to Steering Linkage Outer Tie Rod Replacement . Did you find and correct the condition?	Go to Step 14	Go to Step 11
11	Inspect for damaged shock absorbers. Refer to Suspension Strut and Shock Absorber Testing - On Vehicle . Did you find and correct the condition?	Go to Step 14	Go to Step 12
12	Inspect the front stabilizer shaft and stabilizer shaft links for damage and repair as necessary. Refer to Stabilizer Shaft Replacement , or Stabilizer Shaft Link Replacement . Did you find and correct the condition?	Go to Step 14	Go to Step 13
13	Inspect for control arm damage and repair as necessary. Refer to Lower Control Arm Replacement . Did you find and correct the condition?	Go to Step 14	-
14	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2