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The radiator removal procedure is similar among all of the GM W-Body vehicles. A variety of bolts, nuts, clips and fasteners are used. The following procedure should suffice for all W-Body vehicles.
CAUTION Use care when working underhood around the cooling fans. The fans are controlled by the Powertrain Control Module (PCM) to come on at a certain temperature, even with the engine turned off. Always disconnect the negative battery cable to prevent the fans from starting without warning.
CAUTION Never open, service or drain the radiator or cooling system when hot; serious burns can occur from the steam and hot coolant. Also, when draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantities. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.