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Yes it is very possible
The mode doors which control air flow are vacuum operated. You truck more than likely has a vacuum leak. This could be anything from a pinhole in a line, a leaking actuator or cracked vacuum reservoir.
Just be careful. It's easy to get it one tooth off. If you do it will run ok but ses lt will be on. Even if you get it back in correctly pay a shop to re-synch the ignition it will idle much smoother. If they don't know what your are talking about take it to the nearest GM dealer. David J
It's called a camshaft position sensor. It's located inside the distributor. It's not serviced separately. Even though your buddy doesn't sound like much of a technician he can probably change that for you
This does NOT make sense. What do you hear... a click, the engine cranking but not starting or nothing?
Did you put in a NEW column or a used one. My first instict if it was used is that it was from an incompatable application, faulty component in the used part or installation error. Any ??s let me know. David J
This is not something you want to tackle in the garage, however if you are feeling brave....go to alldata.com. You can pay a fair price for info on your car for a limited amount of time. Really, I own 3 shops...I'd pay one of my techs to do this one.
It can't be a torque converter problem if the symptom is as you described. I sorry to tell you that you have catastrophic transmission failure. Not what you wanted to hear but that's what it is.
you probably have a faulty multi-function switch (turn signal, wiper and head light dimmer) The switch should cost less than $100 and the labor to diag. and replace should be more than 2hrs. at the shops labor rate. Hope this helps. David Johnson