2014 Chevrolet Silverado 1500 Extended Cab Owner Manual - Page 354

9-100 Driving and Operating Such a selection when unloaded may result in unpleasant engine and transmission driving characteristics and reduced fuel economy. Tow/ Haul is recommended only when pulling a heavy trailer or a large or heavy load. amount of brake pressure being applied by the vehicle's brake system, and on the type of trailer brakes detected. This available power output to the trailer brakes can be adjusted to a wide range of trailering situations. The ITBC system is integrated with the vehicle's brake, antilock brake, and StabiliTrak systems. In trailering conditions that cause the vehicle's antilock brake or StabiliTrak systems to activate, power sent to the trailer's brakes will be automatically adjusted to minimize trailer wheel lock-up. This does not imply that the trailer has StabiliTrak. If the vehicle's brake, antilock brake, or StabiliTrak systems are not functioning properly, the ITBC system may not be fully functional or may not function at all. Make sure all of these systems are fully operational to ensure full functionality of the ITBC system. Tow/Haul is designed to be most effective when the vehicle and trailer combined weight is at least 75 percent of the vehicle's Gross Combined Weight Rating (GCWR). See "Weight of the Trailer" under Trailer Towing on page 9-81. Tow/ Haul is most useful under the following driving conditions: . When pulling a heavy trailer or a large or heavy load through rolling terrain. When pulling a heavy trailer or a large or heavy load in stop-and-go traffic. When pulling a heavy trailer or a large or heavy load in busy parking lots where improved low speed control of the vehicle is desired. Integrated Trailer Brake Control System . . Operating the vehicle in Tow/Haul when lightly loaded or with no trailer at all will not cause damage. However, there is no benefit to the selection of Tow/Haul when the vehicle is unloaded. The vehicle may have an Integrated Trailer Brake Control (ITBC) system for use with electric trailer brakes or most electric-over-hydraulic trailer brakes. This symbol is on the Trailer Brake Control Panel on vehicles with an Integrated Trailer Brake Control system. The power output to the trailer brakes is based on the