Engine Oil Pressure Gage Inaccurate or Inoperative. GMC Truck Yukon

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2003 🢒 Yukon - 4WD 🢒 Body and Accessories 🢒 Instrument Panel, Gages, and Console 🢒 Engine Oil Pressure Gage Inaccurate or Inoperative

Step

Action

Value(s)

Yes

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 Instrument Cluster Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Instrument Cluster

Start the engine.

Does the engine oil pressure (EOP) gage display within the specified range?

34-483 kPa (5-70 psi) - 8.1L only

207-483 kPa (30-70 psi)

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

Go to Step 3

Install a scan tool.
Turn the ignition ON, with the engine OFF.
With a scan tool, perform the Displays Test in the IPC scan tool Output Controls.

Does the engine oil pressure gage move up and down when commanded?

Go to Step 4

Go to Step 10

Turn the ignition OFF.
Disconnect the negative battery cable.
Disconnect the EOP sensor.
Measure the resistance from the low reference circuit of the EOP sensor to a good ground.

Does the resistance measure less than the specified value?

5 ohms

Go to Step 6

Go to Step 5

Test the low reference circuit of the EOP sensor for high resistance or for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 11

Go to Step 7

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

Did you find and correct the condition?

Go to Step 11

Go to Step 8

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

Did you find and correct the condition?

Go to Step 11

Go to Step 9

Replace the engine oil pressure sensor. Refer to the following procedures:

•	Engine Oil Pressure Sensor and/or Switch Replacement in Engine Mechanical-4.8L, 5.3L and 6.0L

•	Engine Oil Pressure Sensor and/or Switch Replacement in Engine Mechanical-8.1L

Did you complete the replacement?

Go to Step 11

Important: Program the replacement PCM.

Replace the PCM. Refer to the following procedures:

•	Powertrain Control Module Replacement in Engine Controls-4.8L, 5.3L and 6.0L

•	Powertrain Control Module Replacement in Engine Controls-8.1L

Did you complete the replacement?

Go to Step 11

Replace the instrument panel cluster (IPC). Refer to Instrument Cluster Replacement .

Did you complete the replacement?

Go to Step 11

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2