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134A freon
I have a 2001 chevy venture and I never had any probs. Only thing is the electrical goes out about 180,000 miles
Check coolant level I'm pretty sure it's the head gasket, maybe before it was over heater.
Green coolant
5w30
1.68lbs R134a if you have Front A/C only, 2.21lbs of R134a if you have Front and rear A/C. Source: The sticker under the hood.
it goes on/in the top of the gas tank
I've been told that a sensor located in the plastic reservoir has gone bad. I'm not sure where the sensor is located. It could be located inside the tip of the plastic hose that goes from the radiator to the reservoir.
Not sure how old this posting is but the problem could be the lower intake gasket. I just had mine replaced. If its not under warranty the dealer said it would cost $800.
Needs to be readjusted.
The vacuum line diagram for a 1997 Chevy Venture 3.4 engine outline where each line goes and what it connects to. It can be found within the service manual.
i would have it serviced with a manual trans. it isn't as easy as just adding fluid