Circuit/System Verification

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON.
Verify all the associated primary controls on the radio (Volume, Mute, Seek, etc.) operate properly.
- If any of the primary controls do not function properly
  Refer to Symptoms - Entertainment .
- If all of the primary controls function properly
Verify the scan tool Steering Wheel Control Switches parameter changes when pressing the S70R Steering Wheel Controls Switch - Right buttons.
- If the parameter does not change for some of the S70R Steering Wheel Controls Switch - Right switches
  Replace S70R Steering Wheel Controls Switch - Right.
- If the parameter does not change for all of the S70R Steering Wheel Controls Switch - Right switches
  Refer to S70R Steering Wheel Controls Switch Circuit/System Testing with UV6 or without UV6.
- If the parameter changes for all S70R Steering Wheel Controls Switch - Right buttons
Verify the scan tool Steering Wheel Control Switches parameter changes between Volume Up and Volume Down when depressing the S70F Steering Wheel Controls Switch - Radio Volume switch.
- If the parameter does not change
  Refer to S70F Steering Wheel Controls Switch - Radio Volume Circuit/System Testing.
- If the parameter changes
Verify the scan tool Steering Wheel Control Switches parameter changes between Next Preset and Previous Preset when depressing the S70E Steering Wheel Controls Switch - Radio Presets switch.
- If the parameter does not change
  Refer to S70E Steering Wheel Controls Switch - Radio Presets Circuit/System Testing.
- If the parameter changes
All OK.