Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
511640B
Service Bulletin/Repair Instructions
According to General Motors Recall 23V247: "These vehicles are equipped with an unused circuit that a final-stage manufacturer may elect to use to install an optional rear HVAC system. If the final-stage manufacturer leaves the circuit's connectors or cut wires unsealed, exposure to moisture or contamination may, over time, cause corrosion. This could result in high current draw through the circuit at the vehicles' lower left side B-pillar. Unintended release of excessive heat from the circuit may pose a risk of a vehicle fire and increase the risk of injury."
2020-0044
Service Bulletin/Repair Instructions
To replace the disconnect to EP4 Board Power Cable.
2018-0030
Service Bulletin/Repair Instructions
To inspect and repair by adding a weld in the bottom step entry door assembly.
2019-0033
Service Bulletin/Repair Instructions
To add sealant to the back side of the wheel well and sidewall skin to prevent water intrusion to the vehicle interior.
2019-0032
Service Bulletin/Repair Instructions
To inspect and repair EV-1 or EV-96 Evaporator installation.