Chevrolet Silverado / GMC Sierra. Service manual — part 2707

RATTLE, CLUNK, OR SHUDDER NOISE FROM THE POWER STEERING SYSTEM

Did you complete the repair?

Go to Step 15

-

15

Start the vehicle and rotate the steering wheel
from stop to stop and verify the system is not
leaking.
Did you correct the condition?

System OK

Go to Step 2

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 11

Go to Step 4

4

Inspect the engine drive belt for cracking or
excessive wear. Refer to Drive Belt Falls Off
and Excessive Wear Diagnosis .
Is the drive belt cracked or excessively worn?

Go to Step 12

Go to Step 5

5

Inspect the power steering pump pulley for
damage.
Is the power steering pump pulley damaged?

Go to Step 13

Go to Step 6

6

Inspect the power steering pump and the power
steering mounting bracket/brace for the proper
installation. Refer to Power Steering Pump
Replacement (4.3L) or Power Steering
Pump Replacement (4.8L, 5.3L, 6.0L, and
6.2L) or Power Steering Pump Replacement
(6.6L).
Is the power steering pump installation
incorrect?

Go to Step 14

Go to Step 7

7

Inspect the power steering gear for the proper
installation. Refer to Steering Gear
Replacement (Rack and Pinion) or

Steering

2008 Chevrolet Silverado 1500

2008 STEERING Power Steering - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Gear Replacement (Non-Rack and Pinion)

.

Is the power steering gear installation incorrect? Go to Step 15

Go to Step 8

8

Inspect the steering linkage. Refer to Steering
Linkage Inspection .
Is the steering linkage worn?

Go to Step 16

Go to Step 9

9

Inspect the suspension.
Is the suspension worn?

Go to Step 17

Go to Step 10

10

Inspect the intermediate shaft.
Is the intermediate shaft worn?

Go to Step 18

Go to Step 3

11

Adjust or replace the hoses. Refer to the
appropriate procedure(s):

Power Steering Fluid Cooler
Replacement (Without Hydroboost) or
Power Steering Fluid Cooler
Replacement (With Hydroboost)

Power Steering Gear Inlet Pipe/Hose
Replacement (Gas With Hydroboost)
or Power Steering Gear Inlet Pipe/Hose
Replacement (Gas Without
Hydroboost) or Power Steering Gear
Inlet Pipe/Hose Replacement (Diesel)

Power Brake Booster Inlet Hose
Replacement

Power Brake Booster Outlet Hose
Replacement

Did you complete the repair?

Go to Step 19

-

12

Replace the engine drive belt. Refer to or Drive
Belt Replacement - Accessory .
Did you complete the repair?

Go to Step 19

-

13

Replace the power steering pump pulley. Refer
to Power Steering Pump Pulley
Replacement (4.3L, 4.8L, 5.3L, 6.0L, 6.2L)
or Power Steering Pump Pulley
Replacement (6.6L).
Did you complete the repair?

Go to Step 19

-

2008 Chevrolet Silverado 1500

2008 STEERING Power Steering - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

WHINE OR GROWL NOISE FROM THE POWER STEERING SYSTEM (WITHOUT HYDRAULIC
BOOSTER)

14

Install the power steering pump correctly. Refer
to Power Steering Pump Replacement
(4.3L) or Power Steering Pump
Replacement (4.8L, 5.3L, 6.0L, and 6.2L) or
Power Steering Pump Replacement (6.6L).
Did you complete the repair?

Go to Step 19

-

15

Install the power steering gear correctly. Refer
to Steering Gear Replacement (Rack and
Pinion) or Steering Gear Replacement (Non-
Rack and Pinion).
Did you complete the repair?

Go to Step 19

-

16

Replace the worn steering linkage. Refer to
Steering Linkage Inspection .
Did you complete the repair?

Go to Step 19

-

17

Replace the worn suspension components. Refer
to Diagnostic Starting Point - Suspension
General Diagnosis .
Did you complete the repair?

Go to Step 19

-

18

Replace the intermediate shaft. Refer to Upper
Intermediate Steering Shaft Replacement or
Steering Shaft Coupling Replacement .
Did you complete the repair?

Go to Step 19

-

19

Operate the system in order to verify the repair.
Did you correct the condition?

System OK

Go to Step 3

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 whine or growl noise is present.
Is a whine or growl noise present?

Go to Step 3

System OK

Inspect the power steering fluid for the
following indications of contamination:

Milky fluid - water

2008 Chevrolet Silverado 1500

2008 STEERING Power Steering - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

WHINE OR GROWL NOISE FROM THE POWER STEERING SYSTEM (WITH HYDRAULIC
BOOSTER)

3

Brown fluid - burnt

Debris in fluid - plastic or dirt

Is the fluid free of contamination?

Go to Step 5

Go to Step 4

4

Flush the power steering system. Refer to
Power Steering System Bleeding.
Did you complete the procedure?

Go to Step 11

Go to Step 5

5

Inspect the power steering gear for a whine or
growl noise using J 39570 Chassis Ear.
Is the noise present at the power steering gear?

Go to Step 8

Go to Step 6

6

Inspect the power steering pump for a whine or
growl noise using J 39570 .
Is the noise present at the power steering pump?

Go to Step 9

Go to Step 7

7

Inspect the power steering hoses for a whine or
growl noise using J 39570 .
Is the noise present at the power steering hoses?

Go to Step 10

Go to Step 2

8

Replace the power steering gear. Refer to
Steering Gear Replacement (Rack and
Pinion) or Steering Gear Replacement (Non-
Rack and Pinion).
Did you complete the repair?

Go to Step 11

-

9

Replace the power steering pump. Refer to
Power Steering Pump Replacement (4.3L)
or Power Steering Pump Replacement
(4.8L, 5.3L, 6.0L, and 6.2L) or Power
Steering Pump Replacement (6.6L).
Did you complete the repair?

Go to Step 11

-

10

Adjust the routing of the power steering hoses.
Did you complete the repair?

Go to Step 11

-

11

Operate the system in order to verify the repair.
Did you correct the condition?

System OK

Go to Step 3

Step

Action

Yes

No

Did you review the Power Steering System

Go to Symptoms

2008 Chevrolet Silverado 1500

2008 STEERING Power Steering - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado