GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

DEFINITION: The vibration is engine-speed related. The vibration may be sensitive to accessory load.

1

Check the drive belt for wear, damage, debris build-up and missing belt ribs.

Is the belt worn or damaged?

Go to Step 2

Go to Step 3

2

Replace as necessary. Refer to Drive Belt Replacement .

Is the repair complete?

Go to Step 3

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3

Check for loose or missing fasteners.

Are there loose or missing fasteners?

Go to Step 4

Go to Step 5

4

Re-tighten or replace as necessary.

Is the repair complete?

System OK

--

5

Check for damaged or bent drive pulleys.

Are there damaged drive pulleys?

Go to Step 6

Go to Step 7

6

Repair or replace as necessary.

Is the repair complete?

System OK

--

7

Check for proper tensioner operation.

Is the drive belt tensioner operating properly?

Go to Step 9

Go to Step 8

8

Replace as necessary. Refer to Drive Belt Tensioner Replacement .

Is the repair complete?

System OK

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9

Check for loose, bent or cracked brackets.

Are there loose, bent or cracked brackets?

Go to Step 10

System OK

10

Repair or replace the brackets as necessary.

Is the repair complete?

System OK

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