GM Service Manual Online
For 1990-2009 cars only

Poor Directional Stability

Step

Action

Yes

No

DEFINITION: Driver is unable to maintain consistent, predictable vehicle driving control in any direction.

1

Did you review the system descriptions and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Suspension General Diagnosis

2

Verify that the vehicle exhibits poor directional stability.

Does the vehicle exhibit poor directional stability?

Go to Step 3

System OK

3

  1. Inspect the stabilizer components for wear or damage.
  2. Replace components as necessary. Refer to the following procedures:
  3. •  Fastener Tightening Specifications for the front suspension
    •  Stabilizer Shaft Replacement for the front suspension
    •  Stabilizer Shaft Insulator Replacement for the front suspension
    •  Stabilizer Shaft Link Replacement for the front suspension
    •  Fastener Tightening Specifications for the rear suspension
    •  Stabilizer Shaft Replacement for the rear suspension
    •  Stabilizer Shaft Insulator Replacement for the rear suspension
    •  Stabilizer Shaft Link Replacement for the rear suspension

Did you find and correct the condition?

Go to Step 10

Go to Step 4

4

  1. Inspect the steering and suspension components for wear or damage.
  2. Replace components as necessary. Refer to the following procedures:
  3. •  Lower Control Arm Ball Joint Replacement for the front suspension
    •  Lower Control Arm Replacement for the front suspension
    •  Strut Assembly Replacement for the front suspension
    •  Rear Axle Replacement for the rear suspension
    •  Upper Control Arm Replacement for the rear suspension
    •  Lower Control Arm Replacement for the rear suspension

Did you find and correct the condition?

Go to Step 10

Go to Step 5

5

Inspect the wheel bearing. Refer to Wheel Bearings Diagnosis .

Did you find and correct the condition?

Go to Step 10

Go to Step 6

6

Inspect the vehicle trim height. Refer to Trim Height Inspection .

Did you find and correct the condition?

Go to Step 10

Go to Step 7

7

Inspect the fasteners on the steering column for looseness. Refer to Fastener Tightening Specifications .

Did you find and correct the condition?

Go to Step 10

Go to Step 8

8

Inspect the fasteners on the steering gear for looseness. Refer to Fastener Tightening Specifications .

Did you find and correct the condition?

Go to Step 10

Go to Step 9

9

Measure the wheel alignment. Adjust the alignment as necessary. Refer to Wheel Alignment Measurement .

Did you complete the alignment?

Go to Step 10

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10

Operate the vehicle in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3