GMC Envoy code reader malfunction issue, works on other vehicles on GMC Envoy

Some GMC Envoy owners report experiencing issues with code readers that function properly on other vehicles but malfunction specifically with the Envoy. These problems may arise from using an incompatible scan tool, which can result in the check engine light being illuminated without any additional codes or the scanner defaulting to a generic code (P0000). Additionally, some owners have encountered communication issues due to problems with the Body Control Module (BCM) or faulty wiring and connections to the BCM. Poor connections can hinder communication, so it is advisable to inspect the wiring and connections for sensors and switches that may be setting codes. Furthermore, examining the datastream of the scan tool can help determine if the sensor and switch inputs to the computer are functioning correctly, aiding in the identification of communication issues.