Hvac knobs and gauges use 194 and 74 style leds. Everything else needs to be soldered. By the way, the headlight switch was the biggest pain for me. I suggest getting a spare to work on so you don't screw up yours.
04 ZX3 Mostly Stock ["Best Non-SVT" FITF '12][3/13 ROTM][7/14 ROTM][2014 ROTY]
12 SE Hatch Sport & Winter Package, ST Front End
94 F150 XLT 5.0 HO, OBDII Swap
89 Bronco II XLT Crawler