Check for bare wires and loose connections. Spikes in the line could cause it to trip. The pump itself could be the cause. it maybe heating up or drawing more power after working continuously for some hours. That is the reason it works again after a reset.
I’m happy to assist further over the phone at https://www.6ya.com/expert/uttamjeet_2f3adc18600f8ede
SOURCE: the A/C not working in yukon xl 2004
there is a mode actuator just above the accelerator pedal. That could be the problem or the control head also could need to be programed.
SOURCE: Secondary air supply failure
I have a 2005 Envoy with a 4.2..... Just recently the check engine light illuminated so I read the code after replacing the 20amp fuse labeled cigar. My OBDII connection had no power so if you plug your reader in and nothing check the fuse under the hood labeled "cigar"
After pulling the code P0410 Secondary Air Injection Malfunction I checked the operation of the air pump by removing the hose connected to the solenoid. By the way the solenoid is located on the pass side of the engine top towards the back. After pulling the hose off the solenoid I started the vehicle when it was cold and after 20 seconds or so the pump should turn on and blow air out of the hose. Once I verified the pump was operating I pulled the solenoid then placing jumpers from the Positive & Negative of the battery to the pins on the solenoid. You should be able to hear the solenoid click which says its operating. But mine did nothing so I read across the pins with an Ohm meter and verified the coil was good.
So take some good penetrating oil and fill the inside of the valve with it. You can see the plunger shaft assy in the opening and thats the area you want to fill with a good penetrating oil!!!! Let it sit for a couple of hours keeping it full of oil. The housing is aluminum and the shaft is likely to be a brass material so rust is not possible. Its caused by a buildup of carbon!! The penetrating oil will soften the carbon which in turn will free up the plunger!! MINE WORKS GREAT NOW and plus you will save around $140.00 if you were to buy it from the dealer!!! Or $80.00 aftermarket from RockAuto.com
SOURCE: the A/C not working in yukon xl 2004
If----If everything was working great just prior to replacing the battery...In a desperate attempt--just kidding.
I would disconnect the battery
touch the battery's neg & B+ cable ends together.
This discharges capacitors.
Walk away for a few minutes, reconnect the battery and test HVAC functions to see if all is well.
If not.
The GM Dealer's Scanner can recalibrate the AC/ heater Actuators.
Note - Actuators do go bad, there are several in your truck.
Good Luck
Let us know
Dave
SOURCE: Check Engine light-2003 Yukon XL
you have to take it to a auto part store and they can tell you if there are any problems using a key code and then reset it
SOURCE: Auto trans shifting problem
check the sensor on the transmission and give these guys a call at Schram auto and truck parts 1-800-292-1032 they sell only GM parts or try online at www.schramauto.com
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