Quote:
Originally Posted by DeeJayy
Yeah, turn heater on full blast and put car in normal operating temp and bleed it.
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Actually, no.
For the 3.1/3.4, it goes more like:
Quote:
Refilling
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.
Close the radiator drain rooster.
If previously removed, install the engine block drain plugs.
When installing the drain plugs, use pipe sealer GM P/N 12346004.
Important
On vehicles equipped with the 3.1L engine, open the coolant air bleed valve. The coolant air bleed valve is located on the top of the thermostat bypass pipe/heater pipe assembly. Close the valve once a continuous stream of coolant is expelled from the valve.
Fill the surge tank to the base of the filler neck.
Start the engine with the pressure cap off. Run the engine until the upper radiator hose starts to get hot.
If the coolant level in the surge tank is low, add the proper mix of coolant until the level reaches the full cold line.
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See the highlighted portions.
Do NOT open it when hot! Unless you just want 200F water spraying all over your hand ... and possible other body parts.
RwP