NHTSA Complaint #11715584 — 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.)