GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value

Yes

No

1

  1. Inspect for abnormal engine noise.
  2. If there is abnormal noise from the engine, repair the engine.

Did you complete the action?

--

Go to Step 2

--

2

Inspect the Multi Function Control Module system, if equipped.

Does the system operate properly?

--

Go to Step 3

Go to Step 17

3

Does the battery voltage measure above the specified value?

8 V

System OK

Go to Step 4

4

Inspect the charging circuit and/or generator condition.

Does the system operate properly?

--

Go to Step 5

Go to Step 17

5

Inspect the engine control module (ECM) power sources.

Are any fuses open?

--

Go to Step 18

Go to Step 6

6

Does the main relay operate normally?

--

Go to Step 7

Go to Step 19

7

Does the PCV relay operate normally?

--

Go to Step 8

Go to Step 20

8

Are the wiring harness for the main and the PCV relay restricted?

--

Go to Step 21

Go to Step 9

9

Is the fuel used within specification?

30-44 API Gravity

Go to Step 10

Go to Step 22

10

Is the fuel contaminated with gasoline?

--

Go to Step 22

Go to Step 11

11

Did you find any leakage of the fuel pump, the injection pipe, etc.?

--

Go to Step 17

Go to Step 12

12

Did you bleed air from the fuel line?

--

Go to Step 13

Go to Step 23

13

Did you find a clog, choke, or breakage of the air filter?

--

Go to Step 17

Go to Step 14

14

Is the fuel pre-filter restricted?

--

Go to Step 15

Go to Step 17

15

The gauze filter is fixed in the suction eye bolt on the supply pump.

Is the gauze filter restricted?

--

Go to Step 24

Go to Step 16

16

Inspect the fuel filter for a clog, breakage, etc.

Is the main fuel filter good?

--

System OK

Go to Step 25

17

Replace the problem portion.

Did you complete the replacement?

--

Go to Step 26

--

18

Replace the fuse.

Did you complete the replacement?

--

Go to Step 26

--

19

Replace the main relay.

Did you complete the replacement?

--

Go to Step 26

--

20

Replace the PCV relay.

Did you complete the replacement?

--

Go to Step 26

--

21

Replace the problem wiring harness.

Did you complete the replacement?

--

Go to Step 26

--

22

Replace the fuel with the recommended specification.

Did you complete the replacement?

--

Go to Step 26

--

23

Bleed the air from the fuel line.

Did you complete the action?

--

Go to Step 26

--

24

Replace the gage filter.

Did you complete the replacement?

--

Go to Step 26

--

25

Replace the fuel filter element.

Did you complete the replacement?

--

Go to Step 26

--

26

Operate the vehicle.

Does the engine operate normally?

--

System OK

Go to Step 1