2003 GMC ENVOY Service 4wd

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Page 94 of 442

GMC ENVOY 2003  Owners Manual 4HI (Four-Wheel High):Use 4HI when you need extra
traction, such as on snowy or icy roads or in most
off-road situations. This setting also engages your front
axle to help drive your vehicle.
4LO (Fou

Page 168 of 442

GMC ENVOY 2003  Owners Manual Service Four-Wheel Drive
Warning Light
This light should come on brie¯y when you turn on the
ignition, as a check to show you it is working.
The SERVICE 4WD light comes on to indicate that
there may