Final answer:
GMC's experience as a truck manufacturer is its brand differentiator.
Step-by-step explanation:
The subject of question is Humanities.
In the ad for GMC, the company's experience as a truck manufacturer is its brand differentiator. A brand differentiator is a unique feature or characteristic of a product or company that sets it apart from its competitors. In this case, GMC's extensive experience as a truck manufacturer gives it credibility and expertise in developing luxury SUVs, making them stand out in the market.