I popped in the flasher module last year when I converted to LED, yes, once you find it, its easy to remove... the replacement is a little harder to get in since you are totally working by feel.
Once in it works very well and I cant recommend it enough.
The only weird thing is the clicking sound, seems to come from behind the CD player .. (even with the stereo off!)
Oh, I have had bad luck with the 'newer' matrix 194 bulbs, Where half or all of the unit would burn out after a couple months (just past warranty). I went with the older matrix unit, and havent had a problem at all.
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Van Eyes - slightly trimmed, Sylvania SilverStar ULTRA head lamps, Red (port) & green (starboard) 5 LED 'headlight horn' lights, PIAA silicone windshield wipers, K&N Filtercharger (in stock air box), MacNeil WeatherFlectors, Assorted cargo nets from previous vehicles, Optima red-top battery, Transmission Interceptor, 20 LED 'light tower' turn signals & brake lights, 18W PIAA W2 running lights, Trooper skid plates, Black Luverne step bars w/Tone's custom brackets