Cruise Control System: Description

NOTE: This article applies to "new style" "C" & "K" Series vehicles equipped with 4.8L, 5.3L and 6.0L gasoline engines. For "old style" "C" & "K" Series vehicles with gasoline engines, see CRUISE CONTROL SYSTEMS - ESCALADE, PICKUP, TAHOE & YUKON article. For "C" & "K" Series vehicles with diesel engines, see CRUISE CONTROL SYSTEMS -- TRUCKS & VANS -- DIESEL article.

WARNING: Vehicles are equipped with Supplemental Inflatable Restraint (SIR) system. Before attempting ANY repairs involving steering column, instrument panel or related components, see SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM in appropriate AIR BAG RESTRAINT SYSTEMS article.

Cruise control is a speed control system that maintains a desired vehicle speed under normal driving conditions. Steep grades may cause variations in selected speeds. System has capability to cruise, coast, resume speed, accelerate, and tap-up and tap-down.

The main components of the cruise control system include the Throttle Actuator Control (TAC) module, TAC motor, Accelerator Pedal Position (APP) sensor, Powertrain Control Module (PCM), cruise control functional switches, Vehicle Speed Sensor (VSS), Clutch Pedal Position (CPP) switch and brakelight switch. See COMPONENT LOCATIONS .