GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Starting System Check ?

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Go to Starting System Check

Go to Step 2

2

  1. Place gear selector in the PARK position.
  2. Turn the ignition switch to START.
  3. Observe the SECURITY indicator.

Does the indicator stay on or flash continuously?

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Go to Diagnostic System Check - Theft Deterrent in Theft Deterrent

Go to Step 3

3

Perform the battery load test. Refer to Battery Not Operating Properly .

Did the battery pass the load test?

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Go to Step 5

Go to Step 4

4

Replace the battery. Refer to Battery Replacement .

Is the repair complete?

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Go to Step 37

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5

Check the battery cables and connections.

Are the battery cables and connections OK?

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Go to Step 7

Go to Step 6

6

Repair the battery cable connections or replace battery cables as needed. Refer to Battery Cable Replacement .

Is the repair complete?

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Go to Step 37

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7

  1. Remove the INJR Fuse from the underhood fuse block to prevent the engine from starting.
  2. Turn the ignition switch to START.
  3. Using a J 39200 digital multimeter (DMM), measure the voltage between the starter solenoid terminal S and ground.

Is the measured voltage greater than the specified value?

8V

Go to Step 8

Go to Step 9

8

  1. Check for poor connections at starter solenoid terminal S (PPL).
  2. Check for a dirty or poor ground between the starter and the engine block.
  3. If OK, replace the starter motor. Refer to Starter Motor Replacement .

Is the repair complete?

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Go to Step 37

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9

  1. Using a DMM, measure the voltage from the underhood fuse block connector C3 terminal A14 (PPL) to ground.
  2. Turn the ignition switch to START.

Is the measured voltage greater than the specified value?

8V

Go to Step 10

Go to Step 23

10

  1. Turn the ignition switch to RUN.
  2. Connect a DMM between battery positive voltage (B+) and the underhhood fuse block connector C2 terminal F11 (YEL).

Is the measured voltage greater than the specified value?

8V

Go to Step 11

Go to Step 31

11

  1. Using a DMM, measure the voltage between the underhood fuse block connector C2 terminal B9 (PPL) and ground.
  2. Turn the ignition switch to START.

Is the measured voltage greater than the specified value?

8V

Go to Step 12

Go to Step 13

12

Repair the open in CKT 6 (PPL).

Is the repair complete?

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Go to Step 37

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13

Check the STARTER 30A fuse in the underhood fuse block.

Is the fuse open?

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Go to Step 14

Go to Step 18

14

Check for a short to ground on CKT 6 (PPL).

Is the circuit shorted to ground?

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Go to Step 15

Go to Step 16

15

  1. Repair the short to ground on CKT 6 (PPL).
  2. Replace the STARTER 30A fuse in the underhood fuse block.

Is the repair complete?

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Go to Step 37

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16

Check the starter solenoid for a short to ground.

Is the starter solenoid shorted to ground?

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Go to Step 17

Go to Step 36

17

Replace the starter solenoid. Refer to Starter Motor Replacement .

Is the repair complete?

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Go to Step 37

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18

  1. Turn the ignition switch to OFF.
  2. Remove the STARTER relay from the underhood fuse block.
  3. Note the terminal identification on the bottom of the STARTER relay.
  4. Using the proper adapters from a J 35616 kit, connect a DMM set to DC volts scale across the STARTER relay terminals 85 and 86 in the underhood fuse block.
  5. Turn the ignition switch to START.

Is the measured voltage greater than the specified value?

8V

Go to Step 19

Go to Step 34

19

  1. Disconnect the CKT 6 (PPL) lead at the starter motor terminal S.
  2. Connect a DMM from the starter lead terminal to ground.
  3. Using the proper adapters from a J 35616 , connect a fused jumper across terminals 30 and 87 of the STARTER relay.

Is the measured voltage greater than the specified value?

8V

Go to Step 20

Go to Step 34

20

  1. Remove the fused jumper from the STARTER relay position.
  2. Install the STARTER relay in the underhood fuse block.
  3. Leave the DMM connected as in step 18.
  4. Turn the ignition switch to START.

Is the measured voltage greater than the specified value?

8V

Go to Step 21

Go to Step 22

21

Check for poor terminal contact between the STARTER relay and the underhood fuse block.

Is the terminal contact OK?

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Go to Step 35

Go to Step 22

22

Replace the STARTER relay.

Is the repair complete?

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Go to Step 37

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23

Check the RUN/CRK 15A fuse in the underhood fuse block.

Is the fuse open?

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Go to Step 24

Go to Step 25

24

  1. Repair the short to ground on CKT 1063 (YEL) or CKT 5 (YEL).
  2. Replace the RUN/CRK 15A fuse in the underhood fuse block.

Is the repair complete?

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Go to Step 37

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25

Check the CRK 5A fuse in the rear fuse block.

Is the fuse open?

--

Go to Step 27

Go to Step 26

26

  1. Turn the ignition switch to START.
  2. Using a DMM, check the voltage from each side of the CRK 5A fuse in the rear fuse block to ground.

Is the measured voltage greater than the specified value on both sides of the fuse?

8V

Go to Step 27

Go to Step 28

27

  1. Repair the open or short to ground in CKT 806 (PPL).
  2. Replace the CRK 5A fuse in the rear fuse block as needed.

Is the repair complete?

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Go to Step 37

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28

Check for an open in CKT 1063 (YEL) or CKT 806 (PPL).

Are the circuits OK?

--

Go to Step 30

Go to Step 29

29

Repair the open in CKT 1063 (YEL) or CKT 806 (PPL).

Is the repair complete?

--

Go to Step 37

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30

Replace the ignition switch. Refer to Ignition and Key Alarm Switch Assembly - Disassemble - Off Vehicle and Ignition and Key Alarm Switch Assembly - Assemble - Off Vehicle in Steering Wheel and Column - Tilt.

Is the repair complete?

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Go to Step 37

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31

  1. Disconnect the powertrain control module (PCM) connector C2.
  2. Using the proper adapters from a J 35616 kit, connect a DMM between the PCM connector C2 terminal 76 and ground.
  3. Turn the ignition switch to START.

Is the measured voltage greater than the specified value?

8V

Go to Step 32

Go to Step 33

32

  1. Check the PCM connector C2 for poor terminal contact.
  2. If OK, replace the PCM. Refer to Powertrain Control Module Replacement/Programming in Engine Controls - 3.8L.

Is the repair complete?

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Go to Step 37

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33

Repair the open in CKT 447 (YEL).

Is the repair complete?

--

Go to Step 37

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34

Check the underhood fuse block connectors C2 and C3 for poor terminal contact.

Is the connector terminal contact OK?

--

Go to Step 36

Go to Step 35

35

Repair the underhood fuse block connectors C2 and C3.

Is the repair complete?

--

Go to Step 37

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36

Replace the underhood fuse block.

Is the repair complete?

--

Go to Step 37

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37

  1. Make sure any components removed during diagnosis are installed in place and that all connectors are connected.
  2. Repeat the system check. Refer to Starting System Check .

Is the system check complete?

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System OK

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