Engine Oil Pressure Gage Inaccurate or Inoperative

Step	Action	Values	Yes	No
Schematic Reference: Instrument Cluster Schematics Connector End View Reference: Instrument Panel, Gages, and Console Connector End Views , Powertrain Control Module (PCM) Connector End Views in Engine Controls - 4.8L, 5.3L and 6.0L, orPowertrain Control Module (PCM) Connector End Views in Engine Controls - 8.1L
1	Did you perform the Diagnostic System Check - Vehicle?	-	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	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
3	Install a scan tool. Turn the ignition ON, with the engine OFF. With a scan tool, perform the Displays Test in the instrument panel cluster (IPC) scan tool Output Controls. Does the EOP gage move up and down when commanded?	-	Go to Step 4	Go to Step 10
4	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 Ω	Go to Step 6	Go to Step 5
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
6	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
7	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
8	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	-
9	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 11	-
10	Replace the IPC. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement?	-	Go to Step 11	-
11	Operate the system in order to verify the repair. Did you correct the condition?	-	System OK	Go to Step 2