GMC 1993 Suburban Owner's Manual page 269

Your General Motors dealer knows your vehicle best and wants you to be
happy with it. We hope you'll go to your dealer for all your service needs.
You'll get genuine GM parts and GM-trained and supported service people.
We hope you'll want to keep your GM vehicle all GM. Genuine GM parts
have one
of
these marks:
Dohg Your Own
Servke
Work
If you want to do some
of
your own service work, you'll want to get the
proper General Motors Service Manual. It tells you much more about how to
service your vehicle than this manual can. To order the proper service
manual, see "Service Publications'' in the Index.
You should keep a record with all parts receipts and list the mileage and the
date of any service work you perform. See "Maintenance Record" in the
Index.
8
Be sure you have sufficient knowledge, experience, and the
proper replacement parts and tools before you attempt any
vehicle maintenance task.
8
Be sure
to
use the proper nuts, bolts and other fasteners.
"English" and "metric" fasteners can be easily confused. If you
use the wrong fasteners, parts can later break or fall off. You
could be hurt.
6-3