GMC Sierra Owners Manual
Death and injury associated with drinking and driving is a global tragedy.
Drinking and then driving is very dangerous. Your reflexes, perceptions, attentiveness, and judgment can be affected by even a small amount of alcohol. You can have a serious — or even fatal — collision if you drive after drinking.
Do not drink and drive or ride with a driver who has been drinking.
Ride home in a cab; or if you are with a group, designate a driver who will not drink.