For 1990-2009 cars

# MIXING GM DEX COOL (TM)

#### SUBJECT: Mixing GM DEX-COOL Extended Life Engine Coolant with Saturn Engine Coolant

#### TO: Saturn Fixed Operations Managers

A new extended life engine coolant known as "DEX-COOL" will be used in General Motors vehicles for all 1996 production models and some late 1995 models. This new engine coolant is orange in color to distinguish it from conventional engine coolant.

Saturn vehicles will not be using the new extended life engine coolant. All Saturn vehicles produced from 1991-1996 will continue to use Saturn non-phosphate ethylene glycol based coolant (P/N 21030365) or equivalent. Mixing DEX-COOL engine coolant with Saturn engine coolant could result in damage to the engine and its cooling system components. If a Saturn vehicle's engine cooling system is contaminated with DEX-COOL engine coolant, the engine cooling system must be drained, flushed with clean water, and refilled with Saturn engine coolant. Refilling the engine cooling system with DEX-COOL" could result in damage to the engine cooling system components.

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.