Alright fellas I've got a 1994 k1500 with a tbi 350,4l60e tranny. Truck was running fine went to put it into four wheel drive but wouldn't engage due to a blown fuse. After attempting the engine started idling so low that it would shut off while in gear with brakes applied. Also I noticed the e brake/ brake light on bottom left of cluster would faintly stay lit while driving but go out when I press the brakes. I found the fuse blown when I got back home. I haven't replaced it yet due to parts house is closed. All grounds are good and tight as far as I can tell. Why would the fuse cause the idle problem???? Thanks fellas.