See also:

Exterior
Painted black and trimmed in chrome, my Yukon Denali test vehicle looked more like its Escalade corporate cousin than a tough truck. The Yukon is probably the safest-looking of the three siblings, ...

Reporting Safety Defects to General Motors
In addition to notifying NHTSA (or Transport Canada) in a situation like this, please notify General Motors. Call 1-800-GMC-8782 (1-800-462-8782), or write: GMC Customer Assistance Center P.O. Box ...

Exit Lighting
The interior lamps come on when the key is removed from the ignition. They turn off automatically in 20 seconds. The lights do not come on if the dome override button is pressed in. ...