Tests For Improper Displays (BI64 Displays LO With Oil Level Low)

1. Disconnect the connector from the Low Oil Level Sensor.
   • If display reads HI, replace Low Level Sensor.
   • If display reads LO, go to step  2.
2. Disconnect the BCM. Connect a self powered test lamp to BCM connector terminal 1D13.
   • If test lamp lights, check/repair BRN (114) wire for a short to ground.
   • If test lamp does not light, check BCM terminal 1D13 for a good, clean connection. If connection is good, replace the BCM.

NOTE: For circuit identification, see Fig 1.

Fig 1: Identifying BI64: Low Oil Level Circuit

Courtesy of GENERAL MOTORS CORP.