GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Instrument Cluster System Check?

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Go to Step 2

Go to Instrument Cluster System Check

2

  1. Disconnect the fuel pump and sender connector.
  2. Place the ignition switch in the RUN position.
  3. Connect 1 red lead of J 33431-C to CKT 1589 (PPL/WHT) cavity B at the fuel pump and sender and the other lead to ground.
  4. Set the resistance dials to 40ohms.

Does the fuel gauge indicate full?

--

Go to Step 3

Go to Step 4

3

  1. Place the ignition switch in the LOCK position.
  2. Disconnect the VCM BLUE C1 connector.
  3. Place the ignition switch in the RUN position.
  4. Connect a fused jumper from CKT 30 (PPL) cavity 9 at the VCM BLUE connector to ground.

Does the fuel gauge indicate full?

--

Go to Step 5

Go to Step 6

4

Replace the fuel level sender. Refer to Fuel Sender Assembly Replacement in Engine Controls.

Is the repair complete?

--

Go to Instrument Cluster System Check

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5

  1. Disconnect the instrument cluster.
  2. Use a J 39200 in order to test CKT 30 (PPL) for resistance between the VCM BLUE C1 connector cavity 9 and the cluster connector cavity B2.

Is there continuity?

--

Go to Step 7

Go to Step 8

6

Replace the vehicle control module (VCM). Refer to VCM Replacement/Programming in Engine Controls.

Is the repair complete?

--

Go to Instrument Cluster System Check

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7

Replace the fuel gauge. Refer to Instrument Cluster Replacement .

Is the repair complete?

--

Go to Instrument Cluster System Check

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8

Repair the open in CKT 30 (PPL) between the instrument cluster and the VCM.

Is the repair complete?

--

Go to Instrument Cluster System Check

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