One or More Buttons Inoperative - OnStar

Diagnostic Chart (Part 1 Of 2):

Diagnostic Chart (Part 2 Of 2):

TEST DESCRIPTION
The following numbers refer to the steps in the table.
3. Check for proper operation of the OnStar (R) Center Button.
4. Check for proper operation of the OnStar (R) Call Answer/Call End Button.
5. Check for proper operation of the OnStar (R) Emergency Button.
9. Determine OnStar (R) Button Assembly has the necessary power and signal circuits.

UNO/ULO: For a description of the RPO Code(s) shown in this article refer to the RPO Code List found at Vehicle/Application ID RPO Codes