GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

Did you review the Power Steering System General Description and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Power Steering System

2

Verify that a rattle, clunk or shudder noise is present.

Is a rattle, clunk or shudder noise present?

Go to Step 3

System OK

3

Inspect the power steering hoses for proper routing and clearance.

Is the routing or clearance of the power steering hoses incorrect?

Go to Step 10

Go to Step 4

4

Inspect the engine drive belt for cracking or excessive wear. Refer to Symptoms - Engine Mechanical for the 3.6L (LY7) engine or Symptoms - Engine Mechanical for the 4.6L (LH2) engine.

Is the drive belt cracked or excessively worn?

Go to Step 11

Go to Step 5

5

Inspect the power steering pump pulley for damage.

Is the power steering pump pulley damaged?

Go to Step 12

Go to Step 6

6

Inspect the power steering pump for the proper installation. Refer to Power Steering Pump Replacement .

Is the power steering pump installation incorrect?

Go to Step 13

Go to Step 7

7

Inspect the power steering gear for the proper installation. Refer to Steering Gear Replacement .

Is the power steering gear installation incorrect?

Go to Step 14

Go to Step 8

8

Inspect the suspension.

Is the suspension worn?

Go to Step 15

Go to Step 9

9

Inspect the intermediate shaft.

Is the intermediate shaft worn?

Go to Step 16

Go to Step 3

10

Adjust or replace the hoses. Refer to the appropriate procedures:

Did you complete the repair?

Go to Step 17

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11

Replace the engine drive belt. Refer to Water Pump and Generator Belt Replacement and Water Pump and Generator Belt Replacement for the 3.6L (LY7) engine or Generator Drive Belt Replacement and Water Pump and Air Conditioning Compressor and Power Steering Pump Belt Replacement for the 4.6L (LH2) engine.

Did you complete the repair?

Go to Step 17

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12

Replace the power steering pump pulley. Refer to Power Steering Pump Pulley Replacement .

Did you complete the repair?

Go to Step 17

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13

Install the power steering pump correctly. Refer to Power Steering Pump Replacement .

Did you complete the repair?

Go to Step 17

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14

Install the power steering gear correctly. Refer to Steering Gear Replacement .

Did you complete the repair?

Go to Step 17

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15

Replace the worn suspension components. Refer to Diagnostic Starting Point - Suspension General Diagnosis .

Did you complete the repair?

Go to Step 17

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16

Replace the intermediate shaft. Refer to Upper Intermediate Steering Shaft Replacement , Intermediate Steering Shaft Replacement - Center or Lower Intermediate Steering Shaft Replacement .

Did you complete the repair?

Go to Step 17

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17

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3