Express 1500 AWD V8-5.3L (2008)
every module that could be optioned into the vehicle. If an option is not installed on the vehicle, the scan tool will display No Comm for that options
specific control module. In order to avert misdiagnoses of No Communication with a specific module, refer to Data Link References for a list of
modules, the bus they communicate with, and the RPO codes for a specific module. See: Testing and Inspection/Component Tests and General
Diagnostics