GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value

Yes

No

1

  1. Check the exhaust system components for loosness.
  2. Check for misalignment.
  3. Check the heat shields for loosness.

Are any components loose or misaligned?

--

Go to Step 2

Go to Step 3

2

  1. Align the exhaust system components.
  2. Tighten the connections to specified torque. Refer to Fastener Tightening Specifications .

Did the vibration stop?

--

System OK

Go to Step 3

3

  1. Check for damaged hangers.
  2. Check for damaged mounting brackets.

Are there any damaged hangers or mounting brackets?

--

Go to Step 4

Go to Step 5

4

  1. Replace the damaged hangers and the damaged mounting brackets.
  2. Align the system as necessary.
  3. Tighten the connections to specified torque. Refer to Fastener Tightening Specifications .

Did the vibration stop?

--

System OK

Go to Step 5

5

Check all the flanges, nuts and bolts for damage.

Are any flanges or fasteners damaged?

--

Go to Step 6

Go to Step 7

6

  1. Replace the damaged components.
  2. Align and tighten as necessary to specified torque. Refer to Fastener Tightening Specifications .

Is the exhaust system still vibrating?

--

Go to Step 7

System OK

7

Check the exhaust manifold pipe seal for damage.

Is the exhaust manifold pipe seal damaged?

--

Go to Step 8

Go to Step 1

8

Align, tighten or replace, as required, the exhaust manifold pipe seal.

Has the system stopped vibrating?

--

System OK

Go to Step 1