GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Is the vehicle equipped with drum brakes?

--

Go to Step 2

Go to Step 4

2

Inspect the backing plate for contact with the brake drum.

Is there contact between the brake drum and the backing plate?

--

Go to Step 3

Go to Step 4

3

Replace the brake drum or the backing plate.

Is there still a scraping noise?

--

Go to Step 4

System OK

4

Inspect the pinion flange and the center support bearing for rubbing.

Is there rubbing between the pinion flange and the center support bearing?

--

Go to Step 5

--

5

Correct the interference.

Is there still a scraping noise?

--

--

System OK