new diesel owner, couple of q\'s well, i just moved up from the world of toyota, just picked up a clean 85 blazer with a 6.2. the site helped a lot after me running searches and i got a lot of info. but there are still a couple of questions i have that searching has not answered. 1.those who use block heaters, do they make any noise? i plugged mine in for the first time in its life tonight, and it made some noises that i wasnt comfortable with, sounded like it was boiling, or burning up. 2.it doesnt like to start when warmed up. it was 30* today, and it would fire right up when cold, but after it got to operating temp, it would just crank for close to 7 seconds, then puff a massive cloud of white smoke. now, from what i have read, this sounds like it is the injector pump going bad, but it could also just be the top cap of the pump. or the lift pump. i read that ATF can be used to diagnose a bad injector pump, anyone have any suggestions for what ATF to add(dieseldan possibly)? 3.(last one for now) this will sound dumb, but i cannot fire out my driver side rear tail light. it lights up with the headlights, but not for brakes or turn signals. i have replaced the bulb, and it did nothing. same with the reverse lights. is there a relay that could be shorted out on? i havent torn into it yet, just tried new bulbs so far. a fix it ticket is the last thing i need right now. thanks for all your help.