The vehicle has a Trailer Sway Control (TSC) feature as part of the StabiliTrak system. If TSC detects that the trailer is swaying, the vehicle's brakes are automatically applied.

When TSC is applying the brakes, the TCS/StabiliTrak indicator light flashes to notify the driver to reduce speed. If the trailer continues to sway, StabiliTrak will reduce engine torque to help slow the vehicle.
TSC will not function if StabiliTrak is turned off. See Traction Control/ Electronic Stability Control.
Towing Equipment
Conversions and Add-OnsCruise Grade Braking Description Automatic Transmission Unit
PurposeCruise grade braking assists when driving on a downhill grade.It maintains vehicle speed by automatically implementing a shift schedule that usesthe engine and the transmission to slow the vehicle.ActivationThis feature is internal to the vehicle's software/calibration and requires no custome ...