GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2002 🢒 Envoy - 4WD 🢒 Suspension 🢒 Air Suspension 🢒 Suspension Strut and Shock Absorber Testing - On Vehicle

Step

Action

Yes

No

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 malfunction is present.

Does the vehicle operate normally?

System OK

Go to Step 3

3

Important: A light film of oil on the top portion of the reservoir is normal.

Inspect each shock absorber for external fluid leakage.

Is the shock absorber leaking?

Go to Step 7

Go to Step 4

4

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

Is the vehicle trim height correct?

Go to Step 5

Go to Step 6

5
  1. Use your hands in order to lift up and push down each corner of the vehicle 3 times.
  2. Remove your hands from the vehicle.

Does the vehicle stop bouncing after 2 cycles?

Go to Step 8

Go to Step 7

6

Replace the front spring or the rear spring.

    • Refer to Shock, Shock Component, and/or Spring Replacement in Front Suspension.
    • Refer to Coil Spring Replacement in Rear Suspension.
    • Refer to Air Spring Replacement in Air Suspension.

Did you complete the repair?

Go to Step 8

--

7

Replace the shock absorber.

    • Refer to Shock, Shock Component, and/or Spring Replacement in Front Suspension.
    • Refer to Shock Absorber Replacement in Rear Suspension.

Did you complete the repair?

Go to Step 8

--

8

Operate the vehicle in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3