Schematic Reference: Instrument Cluster Schematics

Connector End View Reference: Instrument Panel, Gages, and Console Connector End Views , Powertrain Control Module Connector End Views in Engine Controls - 4.8L, 5.3L, and 6.0L, or Powertrain Control Module Connector End Views in Engine Controls - 8.1L

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. With the scan tool, observe the Engine Oil Level Switch parameter in the powertrain control module (PCM) Engine Data 2 data list.

Does the Engine Oil Level Switch parameter display OK?

Go to Step 3

Go to Step 4

Does the CHECK ENG OIL LEVEL indicator remain illuminated after the displays test?

Go to Step 11

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

1. Turn the ignition OFF.
2. Disconnect the engine oil level switch.
3. Connect a 3-amp fused jumper between the signal circuit of the engine oil level switch and a good ground.
4. Turn ON the ignition, with the engine OFF.
5. With the scan tool, observe the Engine Oil Level Switch parameter.

Does the Engine Oil Level Switch parameter display OK?

Go to Step 6

Go to Step 5

Test the signal circuit of the engine oil level switch for a short to battery voltage, for an open, or for a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 8

Test the ground circuit of the engine oil level switch for an open or for a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 7

Inspect for poor connections at the harness connector of the engine oil level switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 9

Inspect for poor connections at the harness connector of the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 10

Replace the engine oil level switch. Refer to the following procedures:

Did you complete the replacement?

Go to Step 12

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Replace the PCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 12

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Replace the instrument panel cluster (IPC). Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 12

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2