Circuit/System Testing

NOTE:

The Appropriate SAC005 Proactive Alert Labor Code Must be used to accurately process the claim. See Labor Time Guide: "Engine/Propulsion Proactive Alerts".

Verify the customer has the Proactive Alert SAC005 from OnStar or by using the Scan Tool "Vehicle Diagnostics" - "Vehicle Proactive Alerts".
- If Proactive Alert SAC005 is present.
1. Verify the battery cable connections are clean and tight and verify Voltage is between 12.0 - 15.0 V
  - If not within the specified range
    Refer to Battery Inspection/Test
  - Go to next step: If within the specified range
2. Test for less than 0.5 V between the positive battery terminal and positive terminal at the X50D Fuse Block - Battery with the ignition in the CRANK/START position.
  - If 0.5 V or greater
    Replace the positive battery cable.
  - Go to next step: If less than 0.5 V
3. Test for less than 0.5 V between the positive battery cable at the X50D Fuse Block - Battery and terminal 1 X2 or A X2 at the M64 Starter Motor with the ignition in the CRANK/START position.
  - If 0.5 V or greater
    Replace the positive battery cable.
  - Go to next step: If less than 0.5 V
4. Test for less than 0.5 V between the negative battery cable and the M64 Starter Motor case with the ignition in the CRANK/START position.
  - If 0.5 V or greater
    Replace the negative battery cable.
  - Go to next step: If less than 0.5 V
5. Refer to Battery Inspection/Test
  - If Battery Fails the Test
    Replace the C1 battery.
  - Go to next step: If the Battery Passes the Test
6. Replace the M64 Starter Motor.
- Go to next step: If Proactive Alert SAC005 is not present.
All Ok.