GMC SIERRA 1994 Manual page 255

NOTICE:
Fuel that is more than 5
%
methanol is bad for your vehicle.
Don't use it. It can corrode metal parts in your fuel system and
also damage plastic and rubber parts. That damage wouldn't be
covered under your warranty. And even at 5% or less, there
must be "co~olvent~" and corrosion preventers in this fuel to
help avoid these problems.
Gasolines for Cleaner Air
Your use of gasoline with deposit control additives will help prevent
deposits from forming in your engine and fuel system. That helps keep your
engine in tune and your emission control system working properly. It's good
for your vehicle, and you'll be doing your part for cleaner air.
Many gasolines are now blended with oxygenates. General Motors
recommends that you use gasolines with these blending materials, such as
MTBE and ethanol. By doing so, you can help clean the air, especially in
those parts of the country that have high carbon monoxide levels.
In addition, some gasoline suppliers are now producing reformulated
gasolines. These gasolines are specially designed to reduce vehicle
emissions. General Motors recommends that you use reformulated gasoline.
By doing so, you can help clean the air, especially in those parts of the
country that have high ozone levels.
You should ask your service station operators if their gasolines contain
deposit control additives and oxygenates, and if they have been
reformulated to reduce vehicle emissions.
Diesel Fuel Requirements and Fuel System
Some states and provinces have restrictions on the purchase of diesel fuel
for light-duty vehicles and require you to buy permits or pay special taxes.
Some of these restrictions apply only to residents, and others apply to both
residents and visitors. These restrictions can change. To learn the current
restrictions in any state or province, contact your auto club, the police or
other officials.
6-5