GMC 1999 Sierra 1500 Pickup Owner's Manual page 416

Customer Assistance Information
Service Publications
Information on how to obtain Product Service Publications, Subscriptions and
Indexes as described below is applicable only in the fifty US. states (and the
District of Columbia) and only for light trucks with GVWR less than 10,000
pounds (4536 kg).
In Canada, information pertaining to Product Service Bulletins and Indexes
can be obtained by writing to: General Motors of Canada Limited, Service
Publications Department, 1908 Colonel Sam Dr., Oshawa, Ontario L1 H 8P7.
GMC Truck regularly sends its dealers useful service bulletins about GMC
Truck products. GMC Truck monitors product performance in the field. We
then prepare bulletins for servicing our products better. Now, you can get
these bulletins too.
Bulletins cover various subjects. Some pertain to the proper use and care
of
your vehicle. Some describe costly repairs. Others describe inexpensive
repairs which, if done on time with the latest parts, may avoid future costly
repairs. Some bulletins tell a technician how to repair a new or unexpected
condition. Others describe a quicker way to fix your vehicle. They can help a
technician service your vehicle better.
Most bulletins apply to conditions affecting a small number of trucks. Your
GMC Truck dealer or a qualified technician may have to determine if a
specific bulletin applies to your vehicle.
You can subscribe to all GMC Truck bulletins. This way you'll get them as
they come out. You can wait a while and get an index to the bulletins. You
can also get individual bulletins. However, you'll need the index to identify
them.
Subscriptions
You can subscribe to all GMC Truck Product Service Publications (PSP's).
This
will
include bulletins for
all
light trucks (less than
10,000
Ibs. [4536 kg]
GVWR) sold by GMC Truck and will not be limited to PSP's applicable to any
particular model. When you buy a subscription, you will receive the PSP's in
periodic mailings, shortly after they come out. A subscription costs US.
$75,00 ($85.00 including a special binder) and it entitles you to all PSP's
published by GMC Truck during the model year. You can purchase a
subscription by sending a check or money order to GMC Truck Service
Publications, Post Office Box 436006, Pontiac, Michigan 48343 along with the
order form located at the end of this section. You may get additional
subscription ordering forms by calling the toll-free number shown in this
section, or you can find them at participating dealerships.