Blower motor problem is well known, needs a resistor and harness, easy job:

That "unplugging" thing, that's cute. Get the codes read and fix it, might just be a gas cap.

 

Cute? That's funny. We've established these trucks have a lot of electrical related issues. Vehicles with a lot of electrical issues tend to throw false codes. Unplugging the BCM and PCM was only a stab in the dark based on recommendations by other users in several other threads on this site. More importantly, the point of sites like this is to ask the kind of questions with the possibility someone else has faced the same exact problem and knows the fix without having to chase your tail trying to determine if the codes being thrown are legit, and thats assuming im throwing any codes at all. My check engine light is not and has not come on through any of these issues.
I'm not about to hang out at a shop hoping my gas cap light comes on, its the least of my worries at this point. I only included that in the list of issues to suit point. Do I have a single electrical issue that's causing all of this is what Im trying to get at.

 

The only reason I haven't done the blower repair int he video is that i find it odd that basically eveything I've read about it says it works only on setting 4 and not other settings. Mine either works on all setting or none of them work at all. Hate to piss away the money if its another problem.

 

Additional note: I have pulled the connector apart and there are no burn marks on either piece.

 

Most likely it is the BCM. The problems you have is the common point of the BCM, if you can get a BCM to swap, that might be the test.
After you unplug and reset it, do the problems go away for a while?

 

No the problems didn't go away.

I also forgot to add that my lockout feature, not sure the proper name, kicks in about 2-3 times a month. Were is cranks but wont start, then you gotta wait 20 mins....Another of the Colorado's "common problems"

 

Buying a BCM beats the **** out of replacing all the little things on these individual problems, if in fact it's the BCM causing all this. I guess in my case bad BCM is best scenario...that's sad!

 

I have a 2005 GMC Canyon that sometimes would not start. Crank but not fire. Dealership replaced the ignition switch on the steering column and that fixed the problem. The lock out feature was not working correctly.

Also, had an issue with the engine check light coming on saying check gas cap, etc. Replaced the gas cap and fixed the problem. Mechanic said to make sure you get about three clicks when replacing the cap after refilling gas tank otherwise, the warning light may come on.