For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the instrument cluster diagnostic system check? | -- | Go to Step 2 | Go to Diagnostic System Check - Instrument Cluster
2 |

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. With a scan tool, observe the engine oil life percent in the PCM IPC data list.

Does the scan tool display zero percent with the change engine oil message on?

--

Go to Step 3

Go to Step 4

3 | Reset GM engine oil life system. Refer to GM Oil Life System Resetting in Maintenance and Lubrication. Has the GM engine oil life system been reset? | -- | Go to Step 5 | --
4 | Important: Perform the set up procedure for the replacement IPC. Replace the IPC. Refer to Instrument Cluster Replacement . Did you complete the replacement and the set up procedure? | -- | Go to Step 5 | --
5 |

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. With a scan tool, observe the Engine Oil Life percent in PCM IPC data list.

Does the scan tool display 100 percent with the engine oil message off?

--

System OK

Go to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls - 3.4L