The following exterior lighting features apply to vehicles first sold in the United States. The DRL and AHS must always remain fully functional for vehicles first sold in Canada.

Your vehicle is equipped with Daytime Running Lamps (DRL) and an Automated Headlamp System (AHS). The DRL and AHS can be turned off with the headlamp switch when the transmission is in PARK (P) and the engine is at idle. If the engine is not turned off, the DRL and AHS will remain off when the transmission is placed in gear. The vehicle may be driven with the lamps off for one ignition cycle.

For vehicles first sold in Canada, the DRL and AHS can be turned off if the park brake is pressed and the transmission remains in PARK (P) before the engine is started. To turn off DRL or AHS in Canadian Tahoe Police Package vehicles, your transmission must be in PARK (P) and the parking brake must be set. See your owner's manual for more information.

Your vehicle may have been built with SEO 9G8, DRL and AHS disable. This feature turns off DRL and AHS and requires manual control of the exterior lighting. See your dealer to restore the DRL and AHS to normal operation.