check engine light GMC SIERRA 2014 Get To Know Guide

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Range Selection Mode
Range Selection Mode allows the driver to select the range of gears desired for the current driving conditions.
1. Move the shift lever to the Manual (M) position.
2. Press the + (plus) or – (minus) button on the shift lever to select a lower or higher gear. An M and the current gear will be displayed on the Driver Information Center.
The transmission will be limited to the gear selected and lower gears. If vehicle speed is too high or too low for the requested gear, the shift will not occur.
Tow/Haul Mode
The Tow/Haul Mode adjusts the transmission shifts to reduce shift cycling, such as when towing or hauling heavy loads or driving on steep grades. When towing, u\
se the Tow/Haul Mode to prevent damage to the engine or transmission.
Press the Tow/Haul Mode button on the end of the shift lever to turn the system on or off.
GMC Trailering Guide App
The free trailering guide app includes maximum trailer weight ratings by model along with trailering information on hitches and equipment, GMC trailering technologies, safe trailering techniques and more. Currently available for the iPad®, download the mobile app from the iPad’s app store.
See Driving and Operating in your Owner Manual.
Automatic Transmission
The Low Tire Pressure warning light on the instrument cluster illuminates when one or more of the vehicle’s tires is significantly underinflated. Fill the tires to the proper tire pressures. The proper tire pressures for the vehicle are listed on the T\
ire and Loading Information label, located below the driver’s door latch. Current tir\
e pressures can be viewed in the Driver Information Center.
Tire pressure is affected by cold weather and distance driven. If the low tire pressure
warning light illuminates when the vehicle is first started in cooler temperatures and then turns off as the vehicle is driven, check for the proper tire pressures.\
Refer to your Owner Manual for additional information about normal monthly tire maintenance.
See Vehicle Care in your Owner Manual.
Tire Pressure Monitor