heater core may be partly plugged .
NO It has NOTHING to do with defrost.
Coolent temp sensor faulty?
If that vehicle has a cabin filter, the filter may be plugged up and in need of changing.
yes its under a plastic cap which is under a bigger plastic cap under the winshield on the left side by the defroster
No.
65 hours and 32 minutes
Could be as simple as a very dirty fuel filter. I would start with replacing the fuel filter.
GE sells a few replacement parts for refrigerators that they create, including a replacement water filter as well as a replacement Defrost Thermostat.
Check the filter. If in doubt filter is working , remove filter and verify A/C continues to mal-function.
check your fuel filter, a dirty fuel filter will pull the dirt in to the filter and ccause it to shut off and then in a few minutes when the dirt settles again it will start back up. this is the most common problem with those symptoms.
no only two minutes
Yes, one can replace a fuel filter in a 2006 GMC Envoy Denali. The fuel filter can be located on the frame rail and can be installed in a matter of minutes.