Skylark V6-3100 3.1L VIN M SFI (1996)
Important: Dispose of used coolant in a proper fashion, i.e., in a used coolant holding tank. NEVER POUR USED COOLANT DOWN THE
DRAIN! Ethylene glycol antifreeze is a very toxic chemical; disposing of it into the sewer system or ground water is both illegal and ecologically
unsound!
Inspect
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The drained coolant:
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If the coolant is discolored, flush the cooling system.
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If the coolant appearance is normal, continue with the filing procedure.
FLUSHING
Various methods and equipment may be used to flush the system. If using special equipment such as a back flusher, follow the manufacturer's
instructions. However, the thermostat should be removed before flushing the system.
FILLING
NOTICE: When adding coolant, it is important that you use GM Goodwrench DEX-COOL coolant. If coolant other than DEX-COOL is added to the
system, the engine coolant will require change sooner - at 50,000 km (30,000 miles) or 24 months.
1. Close the radiator drain cock and remove the drain hose.
2. Reinstall engine block drain plugs if previously removed.
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Use pipe sealer GM P/N 12346004 when installing drain plugs.
3. Fill the surge tank to the base of the filler neck.
Important ON VEHICLES EQUIPPED WITH THE 3.1L ENGINE: Open the coolant air bleed valve on the top of. the thermostat bypass pipe/heater
pipe assembly. Once a continuous stream of coolant is expelled from the valve, close the valve.
4. With the pressure cap off, start the engine and let it run until the upper radiator hose starts to get hot.
5. If the coolant level in the surge tank is low, add the proper mix of coolant until the the level reaches the "Split Line".
6. Install the cap onto the tank with hand tight pressure.
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After servicing the cooling system, an occasional intermittent low coolant light (if equipped) may be encountered during some extreme driving
maneuvers. This complaint should be eliminated by removing the surge tank cap and adding coolant to a level just at or above the "Split Line"
when the system is cold.
