If you own a Pontiac or Chevy v6, you will observe they install similar engines, 3400sfi . It's a brittle engine and is susceptible to over heating over time. The trick is to change the head cylinder gasket after 100K plus mileage. And the big one, change the radiator to a double cell one and bingo you solve over heating permanently on this vehicle.
Note; GM has discontinued production of the Pontiac series.
Tony
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