DTC P21B0 GMC
Lost Communication With Parking Heater System
Lost Communication With Parking Heater System
Description
The system voltage is between 9-16 volts. The vehicle power mode requires serial data communication to occur.
Cause and Solution
A supervised periodic message that includes the transmitter module availability has not been received.
Video Guide
Diagnostic Info
- DTC Code: P21B0
- Brand: GMC