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Standing in front of the truck, look behind the battery and to the right of the engine coolant tank filler cap, will be about 2-3" to the right of it. It is the larger port in the lines, and is on the smaller line that goes from the evap core to the condenser core. Make sure to run the A/C on max cool for 2 minutes with engine idling before checking and check pressure when compressor is cycled on. Your proper system pressure will vary with ambient temp so you will need a reference chart.

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14y ago
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Q: Where is the port to add r134a to a 2000 S10 pickup?
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