Blower motor kicks on when key is off,after i run my a/c for awhile,it only runs for about a minute,then it shuts off

Question edited for clarity.
Question moved to model category.

Seems to be a known issue.

Blower Wont Shut Off - 1999-2013 Silverado & Sierra 1500

GM-Trucks.com https://www.gm-trucks.com > forums > topic > 11348...
May 9, 2010 - If the blower resistor is shorting prematurely then you most likely need a blower motor due to excess current draw.

Chevrolet Silverado 2007-2013: Why Won't My Blower Work?

ChevroletForum https://www.chevroletforum.com > how-tos > chevrole...
Another common problem will be the blower motor will stick in the ON position and never shut off.

Blower Motor Won't shut off ' GMC Truck Forum

gmfullsize.com https://www.gmfullsize.com > ... > Maintenance
Jan 17, 2011 - While driving today blower motor Kicked out, I turned up the fan speed and it kicked back in. Got to my destination, turned off the key and the ...

Missing: Classic. ‎' Show results with: Classic.

Heater/blower Won't Shut Off - Ask the GM Technician

GM-Trucks.com https://www.gm-trucks.com > forums > topic > 72853-...
Jan 11, 2008 - Cause is a mis-positioned harness from the blower motor assembly to the right I/P fuse block C4 causing harness rub through at right I/P metal ...

key on or key off or both?
blower on high and all speeds blow ,key off?
we not see any of that.
must be told
answering for in dash HVAC blower motor runs full time.

Have you checked to see if the blower relay is stuck on ?

Either the blower motor relay is stuck closed and running all the time.Relay should be under the hood. Look in the owners manual for the location. Also does it shut off with key or continue to run, Most likely a stuck blower motor relay.

Blower motor short to ground.

this sounds like a crank position sensor issue, however check the condition of the battery and for tight battery connections first. The blower motor may be another issue, blower motor relay or a loose or burnt connection at the blower motor or the blower motor resistor and lastly a bad blower motor.

If your check engine light is on have the codes read. This may help you in finding the problem.

If you haven't fixed this yet, your Blower motor resister module is bad. It is located to the left of the blower motor and mounted in the A/C air box. Just pull the right kick panel down and you will see it.

There is a fan that comes on when the coolant is hot in the engine. When the engine is shut off the water pump shuts off as well. The ambiant temperature of the engine tells the fan to come on to cool the engine down. It will usually come on a minute or two after you shut off the engine, and then continue to run for two to six minutes-ish, and then shut back off. It isn't enough run time to deplete the batery much, and you should have no problems with it. It is just a normal part of the efficient cars that are made these days.
Most cars and trucks have two fan motors to regulate the temperature of the coolant. One is usually driven by the engines power and the other is electric.

Could be a faulty switch, or wire connector problem, and not necessarily the blower motor. You could save yourself $600 by doing a little troubleshooting to find the problem.

Try wiggling the wire connector at the blower and the switch. If it is the blower motor, spend a few dollars for a chilton's manual or haynes, and do it yourself.

i had the same problem on my 2002 Axiom, I took it to the dealer and they said the blower motor is going out. They replaced it with a new one and it works fine now!