Power Steering Fluid Leaks. GMC Truck GMC Sierra Denali 2006

GM Service Manual Online

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2006 🢒 GMC Sierra Denali 🢒 Steering 🢒 Power Steering System 🢒 Power Steering Fluid Leaks

Step

Action

Yes

Did you review the Power Steering System General Description?

Go to Step 2

Go to Power Steering System Description and Operation

Inspect the power steering system for the following:

•	Inspect the power steering fluid level and condition.

•	Inspect for aftermarket devices which could affect the operation of the power steering system.

•	Inspect the power steering system components for obvious damage or conditions which could cause leaks.

•	If necessary, clean the power steering system components, start the engine, and rotate the steering wheel from stop to stop. Turn the engine off and inspect all power steering system components for leaks.

Is the power steering system leaking?

Go to Step 3

Go to Step 15

Inspect the power steering system fittings.

Are the fittings leaking?

Go to Step 9

Go to Step 4

Inspect the power steering hoses.

Are the hoses leaking?

Go to Step 10

Go to Step 5

Inspect the following power steering pump components for leaks.

•	Flow control valve seal

•	Power Steering Pump Shaft Seal

•	Power Steering Pump Reservoir and Seals

•	Power Steering Pump

Is the power steering pump components leaking?

Go to Step 11

Go to Step 6

Inspect the following power steering gear components for leaks.

•	Power Steering Cylinder Lines and/or Seals

•	Power Steering Gear Stub Shaft Seals

•	Power Steering Gear Pitman Shaft and/or seals

Is the power steering gear components leaking?

Go to Step 12

Go to Step 7

Inspect the power steering cooler for leaks.

Is the power steering cooler leaking?

Go to Step 13

Go to Step 8

Inspect the hydraulic brake booster assembly for leaks. Refer to Hydraulic Brake Booster Leak Inspection .

Is the hydraulic brake booster assembly leaking?

Go to Step 14

Go to Step 3

Tighten the fittings. Refer to Fastener Tightening Specifications .

Did you complete the repair?

Go to Step 15

Replace the power steering hoses. Refer to the appropriate procedure(s):

•	Power Steering Gear Inlet and Outlet Hose Replacement

•	Power Steering Gear Inlet Pipe/Hose Replacement

•	Power Brake Booster Inlet Hose Replacement

•	Power Brake Booster Outlet Hose Replacement

•	Power Steering Gear Outlet Pipe/Hose Replacement

Did you complete the repair?

Go to Step 15

Replace the leaking power steering pump component. Refer to the appropriate procedure(s):

•	Power Steering Pump Flow Control Valve Replacement - Off Vehicle

•	Power Steering Pump Shaft Seal Replacement

•	Power Steering Fluid Reservoir Replacement - Off Vehicle

•	Power Steering Pump Replacement

Did you complete the repair?

Go to Step 15

Replace the leaking power steering gear component. Refer to the appropriate procedure(s):

•	Steering Gear Cylinder Pipe Assembly and Seals Replacement - Off Vehicle

•	Steering Gear Pitman Shaft Seal and Bearing Replacement - Off Vehicle

•	Stub Shaft Housing Replacement .

•	Steering Gear Pitman Shaft and Housing Cover Replacement - Off Vehicle

•	Steering Gear Replacement .

Did you complete the repair?

Go to Step 15

Replace the power steering cooler. Refer to Power Steering Cooler Pipe/Hose Replacement .

Did you complete the repair?

Go to Step 15

Replace the hydraulic brake booster assembly. Refer to Power Brake Booster Replacement .

Did you complete the repair?

Go to Step 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 3