GMC Sierra Quiz
Driving and Operating

Manual Mode

In this manual: Driving and Operating
Introduction — 6In Brief — 46Seats and Restraints — 48Storage — 7Instruments and Controls — 75Lighting — 22Infotainment System — 22Climate Controls — 7Driving and Operating — 77Vehicle Care — 79Service and Maintenance — 26Technical Data — 8Customer Information — 25OnStar — 25Keys, Doors, and Windows — 38
~1min read

Range Selection Mode (Allison® Transmission or Hydra-Matic® 6-Speed Transmission)

GMS Sierra: Manual Mode. The vehicle may have a Range Selection Mode. The Range Selection Mode helps control the vehicle's transmission and vehicle speed while driving down hill or towing a trailer by letting you select a desired range of gears.

Test yourself

A quick GMC Sierra quiz: every answer comes with an explanation and a link to the manual page.