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 Steo 4

Go to Step 5

4

Tighten all the fasteners to the specifications. Refer to Fastener Tightening 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 if used to the specifications. Refer to Fastener Tightening Specifications.
  2. Replace the clamps if damaged.

Does the exhaust still leak or make noise?

--

--

System OK