GMC 1997 Savana Van Owner's Manual page 6

You will also find a circle
with a slash through it in
this book. This safety
symbol means "Don't,"
"Don't do this," or "Don't
let this happen."
Vehicle Damage Warnings
Also, in this book you will find these notices:
I
NOTICE:
These mean there is something that could
damage your vehicle.
In the notice area, we tell you about something that can
damage your vehicle. Many times, this damage would
not be covered by your warranty, and it could be costly.
But the notice will tell you what to do to help avoid
the damage.
When you read other manuals, you-might see
CAUTION and NOTICE warnings in different colors or
in different words.
You'll also see warning labels on your vehicle. They use
the same words, CAUTION or NOTICE.
iv