SERVICE GUILD: ENGINE COOLANT SUBSTITUTE INFORMATION

Model and Year: 1989 CHEVROLET VEHICLES

With the continuing shortage and increasing prices of ethylene glycol, several substitutes have appeared on the market.

These substitutes appear with many names and a variety of prices. Recognizing that price is a major consideration when purchasing required materials, we caution dealers to assure that a bargain is indeed a bargain.

Many substitutes will require increased concentrations for freeze protection and may inhibit cooling capability.

Only ethylene glycol based coolants meeting the GM 1825M specification are approved for use in Chevrolet vehicles. Coolants which use substitutes for ethylene glycol do not meet warranty requirements.

Dealership service managers are requested to provide parts ordering personnel a copy of this bulletin for their information and guidance.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.