LANDSIN Automatic Transmission Shift-to-Park Control Switch 84955379 — Direct-Fit OEM Connector, Restores Park-Lock

LANDSIN 84955379 is a direct-fit automatic transmission shift-to-park control switch designed to stop erroneous 'shift to P' alerts and restore reliable park-lock signaling on compatible GM vehicles.

This replacement shifter control switch (often called the park/shift lock solenoid or BTSI switch) replaces OEM part number 84955379 and is engineered to match the original fit and electrical connections for a straightforward swap. It is intended for Chevrolet and GMC models from the 2016–2019 model years that experience intermittent contact, false 'shift to P' messages, or loss of shift-lock function. Built to factory tolerances, the unit aims to bring back consistent transmission signaling without complex wiring or programming.

Which vehicles will this LANDSIN switch fit?

The LANDSIN 84955379 replacement is designed to fit several Chevrolet and GMC models from the 2016–2019 model years. Confirm fitment by matching your vehicle year and OEM part number before purchasing.

• Chevrolet Malibu: 2016, 2017, 2018, 2019
• Chevrolet Blazer: 2016–2019 where equipped
• Chevrolet Traverse: 2016–2019 compatible applications
• GMC Acadia: 2017, 2018, 2019

How does the LANDSIN switch solve shift-to-park warnings?

This control switch restores reliable electrical contact within the transmission shifter assembly and resets the shift-lock signaling pathway. By replacing a worn or intermittent OEM switch you can remove recurring dashboard prompts and re-enable normal park-lock behavior.

• Fixes contact-related continuity issues that trigger false alerts
• Restores electronic signal flow to the transmission control circuit
• Prevents unexpected shift-lock or 'shift to P' messages
• Matches OEM electrical connector for proper communication with vehicle systems

Is installation difficult — what should I expect?

Installation is typically straightforward: the LANDSIN unit uses a plug-and-play design that connects to the existing wiring harness and mounts in the original location. Basic mechanical skills and common hand tools are usually sufficient, but consult a factory service manual if you're unsure about transmission cover removal or electrical safety.

• Direct plug-in connector fits original harness — no splicing required
• Mounts into the OEM bracket or housing to maintain factory alignment
• Minimal calibration needed; most vehicles recognize the replacement automatically
• Recommended: disconnect battery and follow vehicle-specific safety steps

What are the build and quality characteristics of this replacement?

The LANDSIN shifter switch is manufactured and tested to deliver stable electrical performance and long-term wear resistance. It undergoes factory testing to ensure accurate transmission of operation commands and durable mechanical properties under normal driving conditions.

• Engineered for wear resistance and mechanical toughness
• Factory testing verifies signal accuracy and durability
• Replaces OEM part 84955379 for a direct fit and operation match
• Corrosion-resistant contacts and robust housing construction

Who is this for: The LANDSIN 84955379 Automatic Transmission Shift-to-Park Control Switch is aimed at owners and technicians of Chevrolet Malibu, Blazer, Traverse (2016–2019) and GMC Acadia (2017–2019) who are experiencing recurring 'shift to P' errors, intermittent shift-lock problems, or loss of transmission park signaling. It suits buyers seeking a direct-fit OEM-style replacement that installs with the original connector and restores normal shifter electronic function without complex modifications.