I am not certain, but I thought all 98-02 Cruisers came with a condenser fan? Was yours ever in a front-end wreck, maybe they took it off and did not replace it if it was?
Have you checked the actual low-side pressure with real manifold gauges? You can get a perfectly workable set of gauges off Amazon for ~$35. Look for it to be 35-42 psi with the truck warmed up and the AC on full. If it's less, than you need R-134a. Right now you are just guessing....