GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2007 🢒 TrailBlazer - 4WD 🢒 Suspension 🢒 Suspension General Diagnosis 🢒 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 General Description and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Suspension General Diagnosis

2

Verify that the directional stability is poor.

Does the system operate normally?

System OK

Go to Step 3

3
  1. Inspect the stabilizer shaft, links, and insulators for wear or damage.
  2. Replace as necessary. Refer to the following:

Does the vehicle still exhibit poor directional stability?

Go to Step 4

System OK

4
  1. Inspect the lower control arms, ball joints, and tie rods for wear or damage.
  2. Repair as necessary.

Does the vehicle still exhibit poor directional stability?

Go to Step 5

System OK

5

Inspect the wheel bearings/hubs for looseness or excessive lateral runout. Refer to Wheel Bearings Diagnosis.

Does the vehicle still exhibit poor directional stability?

Go to Step 6

System OK

6
  1. Inspect the vehicle trim height. Refer to Trim Height Specifications.
  2. Repair as necessary.

Does the vehicle still exhibit poor directional stability?

Go to Step 7

System OK

7

Inspect and adjust the wheel alignment as necessary. Refer to Wheel Alignment Measurement.

Does the vehicle still exhibit poor directional stability?

Go to Step 8

System OK

8
  1. Inspect the steering column for looseness. Refer to Looseness in Steering Column.
  2. Repair as necessary.

Did you complete the repair?

Go to Step 9

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9
  1. Inspect the steering gear mounting bolts for looseness. Refer to Fastener Tightening Specifications.
  2. Inspect the bearing preload adjustment. Refer to Steering Gear Rack Bearing Preload Adjustment - Off Vehicle.
  3. Repair as necessary.

Did you complete the repair?

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