2005 Chevrolet Colorado Owner's Manual - Page 11

Manual Lumbar If your vehicle has this feature, there will be a knob located on the outboard side of the driver's seat. Heated Seats If your vehicle has this feature, the controls are located on the outboard side of the front seats. Turn the knob counterclockwise to increase lumbar support and clockwise to decrease lumbar support. This feature will quickly heat the lower cushion and lower back of the driver's and front passenger's seats for added comfort. Press the lower part of the switch to turn the heater on at low heat. Press the upper part of the switch to turn the heater on at high heat. Put the switch in the center position to turn the heater off. The ignition must be on for the heated seat feature to work. The passenger's safety belt must be engaged for the heated seat feature to work on the passenger's seat. 1-5