Shopping Cart

Your cart is empty.

Your cart is empty.

General Motors Genuine Parts 84377721 Transfer Case Two/Four Wheel Drive Actuator Position Sensor

4.6 (6) Write Review
Free shipping on orders over $29.99

$78.12

$ 36 .99 $36.99

In Stock

About this item

  • Helps ensure accurate readings of the transfer case range position
  • Allows for your vehicle to switch between two-wheel drive and 4WD
  • Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
  • GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
  • GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
  • GM regularly updates production and service part designs to integrate new materials and technologies


GM Genuine Parts Transfer Case Range Position Sensor. Working with a motor to switch your vehicle between two-wheel drive and four wheel drive (4WD), this sensor sends a signal to the transfer case control module indicating the position of the transfer case between range changes. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE). WARNING: Cancer and Reproductive Harm


chad parnell
September 4, 2025
Fixed my 4x4 light
Michael McGee
July 11, 2025
Exact fit for 2008 Silverado. Had codes for transfer position sensor. Replaced sensor and no more issues or codes. OEM GM part is a plus also.
Alexandr Divachuk
March 3, 2025
Fits great. After install my problem disappeared
Kristina A.
January 21, 2025
2016 canyon. AWD service light. Replaced and it cleared.
JT
December 27, 2024
Bolted right up and fixed my problem.
bmur
December 17, 2024
Sensor was used broken and missing the gasket . Did not work at all. Easy to install just wish it wasn't used and broken