Automatic Transmission Control Module problems of the 2022 GMC Sierra 1500

1) component/system & availability for inspection transmission control system. When shifting into reverse, the check engine lamp flashed and a “transmission service” warning appeared. Dealer retrieved dtc p07b4 and documented: “diagnosis of engine/check engine lamp - customer states when shifting in reverse check engine light came on flashing and warning message on for transmission service. Check and advise. Note: customer does not feel any issue when driving. Savi code p07b4. ” the component remains installed and is available for inspection upon request. 2) safety risk a transmission control malfunction can lead to unpredictable shifting or loss of propulsion, posing risk during reversing, crossing traffic, or merging. 3) reproduced/confirmed by dealer? yes. Dealer confirmed the condition and stored code p07b4 consistent with my report. 4) inspected by others? inspected by an authorized gm dealer. No inspections by police/insurance/others. 5) warning lamps/messages & onset yes. The check engine lamp began flashing immediately when shifting into reverse, with a “transmission service” message. I did not feel drivability issues at that moment. Addendum — link to gm safety recall n242454440 gm safety recall n242454440 addresses excess wear of a transmission control valve that degrades hydraulic pressure, causes harsh shifting, and—rarely—momentary rear?wheel lock?up during a downshift. The remedy is a tcm software update that monitors valve performance and detects wear ~10,000 miles before a potential event; if detected, the transmission is limited to 5th gear and warning messages appear. My transmission warnings and dtc indicate a transmission control/pressure concern consistent with the recall subject. I request that NHTSA consider this complaint related to n242454440 and ensure appropriate recall remedy and coverage. (gm service bulletin/stop?delivery and NHTSA filings corroborate these details. ).