GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Inspect the components.

Are the components misaligned or improperly installed?

--

Go to Step  2

Go to Step  3

2

  1. Align the components.
  2. Tighten the components to the specifications. Refer to Fastener Tightening Specifications .

Does the exhaust still leak or make noise?

--

Go to Step  3

System OK

3

Inspect the connections at the exhaust manifold and the converter

Is either connection loose?

--

Go to Step  4

Go to Step  5

4

Tighten all the fasteners to the specifications.

Does the exhaust still leak or make noise?

--

Go to Step  5

System OK

5

Inspect the exhaust manifold.

Is the manifold cracked or broken?

--

Go to Step  6

Go to Step  7

6

Replace the exhaust manifold.

Does the exhaust still leak or make noise?

--

Go to Step  7

System OK

7

Inspect the crossover exhaust pipe.

Is the pipe leaking?

--

Go to Step  8

Go to Step  9

8

Tighten the nuts and the bolts to the specifications. Refer to Fastener Tightening Specifications .

Does the exhaust still leak or make noise?

--

Go to Step  9

System OK

9

Inspect the exhaust seals.

Are the seals damaged or worn?

--

Go to Step  10

Go to Step  11

10

Replace the seals.

Does the exhaust still leak or make noise?

--

Go to Step  12

System OK

11

Inspect the intermediate pipe.

Is the pipe damaged or cracked?

--

Go to Step  12

Go to Step  13

12

Replace the intermediate pipe. Refer to Intermediate Pipe Replacement .

Does the exhaust still leak or make noise?

--

Go to Step  13

System OK

13

Inspect the muffler/resonator.

Is the muffler/resonator perforated or damaged?

--

Go to Step  14

Go to Step  15

14

Replace the muffler/tailpipe or the resonator. Refer to Muffler Replacement .

Does the exhaust still leak or make noise?

--

Go to Step  15

System OK

15

Inspect the exhaust component joints.

Is there leakage at the joints?

--

Go to Step  16

--

16

  1. Tighten the clamps to the specifications. Refer to Fastener Tightening Specifications .
  2. Replace the clamps if damaged.

Does the exhaust still leak or make noise?

--

--

System OK