GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

DEFINITION: A knock or a clunking noise in the driveline that occurs during operation of the vehicle in high gear or during coasting in neutral at a speed of 16 km/h (10 mph.)

1

Inspect the universal joints for the following conditions:

    • Damage
    • Wear

Are any of the universal joints damaged or worn?

--

Go to Step 2

Go to Step 3

2

Replace the worn or damaged universal joint(s).

Is there still a knock or a clunking noise?

--

Go to Step 3

System OK

3

Inspect the differential side gears for wear.

Are any of the differential side gears worn?

--

Go to Step 4

--

4

Replace the worn differential side gear(s)?

Is there still a knock or a clunking noise?

--

--

System OK