
Employees at GMC Truck rank Mary Barra in the Bottom 25% of similar sized companies. Comparatively, employees at OnStar rank Mary Chan in the Top 40% of similar sized companies. Employees rate their CEO differently based on the frequency of interaction, ability to affect company culture, and drive measurable results.

Women at GMC Truck rated their CEO a F

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Diverse Employees at GMC Truck rated their CEO an A+

Diverse Employees at OnStar rated their CEO a F




At GMC Truck, employees in the Customer Support department rate Mary Barra the highest. According to employees, Mary Barra's ability to drive business results is Very Bad.