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r12

It would have come from the factory w/R12, someone could have convereted it to r134. If that happened the low pressure line (larger line) should have a blue cap on it. The schrader valve would be appx 3/8" across.
 

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A properly converted system will have the R134A quick-connect fittings on the service ports. If it has screw-on fittings that look like a tire valve, it is either still running R12 or was converted improperly, without installing proper service adapters.

Also, if it blows ice cold in 100 degree weather, its R12!
 

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Should be a label on the silver A/C canister on the passenger side firewall under the hood... many times, if converted over to r134a, the garage that did it puts a sticker on the the canister and/or cowl to state the conversion.
 
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