Ac and recirc

[87carl]

When I push ac or recirc buttons they just flash 3 times and do nothing. Last summer tried doing relearn reset procedure disconnect battery wait hook up hold buttons etc that did nothing. Read before ac won't work without recirc. Checked all fuses and relays. Where is the recirc door and how is it changed was thinking trying to replace it with one from parts truck but can't find any info on how to do that for the 07-14s anything else that could cause it?

 

[swathdiver]

When I push ac or recirc buttons they just flash 3 times and do nothing. Last summer tried doing relearn reset procedure disconnect battery wait hook up hold buttons etc that did nothing. Read before ac won't work without recirc. Checked all fuses and relays. Where is the recirc door and how is it changed was thinking trying to replace it with one from parts truck but can't find any info on how to do that for the 07-14s anything else that could cause it?

You've got another problem Carl and really need a bi-directional scan tool that can read the BCM codes to know what is wrong with it. Those resets do nothing. Could be just low on refrigerant or a sensor could've gone bad. Don't guess, put a Tech-2 on it and know in moments what needs fixin'!

 

[87carl]

I will have to find someone who has one

 

[gooffeyguy]

My AC will run without recirculation on. I always thought with recirculation on was MAX AC

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[Tonyrodz]

My AC will run without recirculation on. I always thought with recirculation on was MAX AC

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Recirc circulates the already cold air that's in the cab.

 

[gooffeyguy]

Recirc circulates the already cold air that's in the cab.

Yeah, making it max ac

on my 2001 with the manual hvac controls, there's even an imprinted arrow pointing to both AC and Recirculate button with MAX AC label

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[petethepug]

Defrost setting will disable the resurc feature. I’ve also encountered situations where <50* temps will defeat the resurc feature like that.

This may head off any concerns...

https://workshop-manuals.com/gmc/ac...7/a/c_indicators_flashing_(normal_condition)/

This feature is sure to carry on into past and present models in a slightly different way to somehow save a drop of fuel or ... some manufacturers do stuff like this when cold to allow already present cold air into the car while letting the a/c system equalize the system pressures. It prevents a slug of liquid refrigerant from getting into the compressor.

There’s a lot of different scenarios but the $279 tech II purchase will allow you to master your destiny and pay you back several times the first year.


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[gooffeyguy]

My recirc doesn't always come on when the ac is on. It all depends on how hot it is outside and how cold you want it.

Current outside temp is 82, ac on but not recirc

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[87chels]

You've got another problem Carl and really need a bi-directional scan tool that can read the BCM codes to know what is wrong with it. Those resets do nothing. Could be just low on refrigerant or a sensor could've gone bad. Don't guess, put a Tech-2 on it and know in moments what needs fixin'!

Found the list of codes they gave me when they failed to align the burb on march 31st its long but would any of these be what is causing the problem with the ac? How would i go about fixing any of these? Tpms codes are from not programming them when changing tires. Abs codes been there since i replaced wheel bearings during lift not sure why. They are plugged in connected didn't damage any wires. Also has a evap code not on this list. Other problems burb has that might be related to these codes are
for last 6 months Rear hatch glass part wont open (fuse is good) keyfob battery is good. Button on lift gate is long gone.
Week ago (so after this code list scan) the entire lift gate stopped opening fuse good but button on gate handle does nothing. Huge pain in butt.
gauge cluster info rectangle and gear indicator rectangle don't light up been like that for over a year.
Occasionally will randomly lock or unlock itself while parked (not often but still never leave keys inside the burb)
the passenger taillights work but are alot dimmer than driver side.
the rest of the stuff listed in these codes don't have any symptoms i know of. Mirrors interior lamps passenger presence and everything else with the burb all seem to function normal.

B0081: symptom 5a
System- Passenger presence system
-Passenger presence system 1 plausibility failure.
History dtc

B1000: symptom 34
System- door switch driver, door switch passenger
-Electronic control unit performance RAM failure.
Test failed since dtc clear, history dtc, test not passed since power up, warning indicator requested.

B1000: symptom 35
System- door switch driver, door switch passenger
-Electronic control unit performance ROM failure.
Test failed since dtc clear, history dtc, test not passed since power up, warning indicator requested.

B1000: symptom 43
System- door switch driver, door switch passenger
-Electronic control unit performance EEPROM failure.
Test failed since dtc clear, history dtc, test not passed since power up, warning indicator requested.

B1023: symptom 00
System- door switch driver
-Integral switch malfunction
Test failed since dtc clear, history dtc, warning indicator requested.

B1325: symptom 03
System- Passenger presence system
-device device power 1 circuit voltage fault voltage below threshold
history dtc

B1600: symptom 02
System- door switch driver
-mirror motor vertical circuit short or open short to ground
Test failed since dtc clear, history dtc, test not passed since power up, warning indicator requested.

B2455: symptom 00
System- vehicle communications interface
-Cellular phone microphone circuit
History dtc

B2476: symptom 00
System- vehicle communications interface
-Cellular phone select service switch
History dtc

B2555: symptom 01
System- door switch driver, door switch passenger
-Passenger compartment lamp control circuit short to battery
Test failed since dtc clear, history dtc

B2555: symptom 02
System- door switch driver, door switch passenger
-Passenger compartment lamp control circuit short to ground
Test failed since dtc clear, history dtc

C0035: symptom 00
System- antilock brakes
-Left front wheel speed sensor circuit fault
History dtc

C0040: symptom 00
System- antilock brakes
-Right front wheel speed sensor circuit fault
Current dtc, history dtc current dtc since power up, warning indicator requested.

C0750: symptom 00
System- keyless entry, tire pressure monitor
-Left front low tire pressure sensor
History dtc

C0755: symptom 00
System- keyless entry, tire pressure monitor
-Right front low tire pressure sensor
History dtc

C0760: symptom 00
System- keyless entry, tire pressure monitor
-Left rear low tire pressure sensor
History dtc

C0765: symptom 00
System- keyless entry, tire pressure monitor
-Right rear low tire pressure sensor
History dtc

U0140: symptom 00
System- door switch driver, door switch passenger
-Lost communication with body control module
Test failed since dtc clear, history dtc

U0199: symptom 00
System- door switch passenger
-Lost communication with door control module
Test failed since dtc clear, history dtc

Systems without codes:
Transmission
Airbag
Body control module
HVAC
Instrument panel cluster
Parking assist module
Radio
Rear HVAC/RSA
Theft deterrent
Transfer case.

 

[swathdiver]

Found the list of codes they gave me when they failed to align the burb on march 31st its long but would any of these be what is causing the problem with the ac?

Don't think so, There will be other BCM codes for the HVAC.

As for the lift gate switch, that's a five minute job to swap in a new one. For the lift gate, there is a dimple in the rear trim that marks the center for a hole saw to gain access to the switch so it can be manually opened with a screwdriver. GM sells a cover for this new hole. As for why it is all not working, I would again, test with Tech-2 and inspect the wiring going into the lift gate once you get it opened.

The ABS sensors may not be compatible if you did not use OE or ACDelco parts when replacing the hubs. Timken and Doorman also work.

 

[87chels]

Don't think so, There will be other BCM codes for the HVAC.

As for the lift gate switch, that's a five minute job to swap in a new one. For the lift gate, there is a dimple in the rear trim that marks the center for a hole saw to gain access to the switch so it can be manually opened with a screwdriver. GM sells a cover for this new hole. As for why it is all not working, I would again, test with Tech-2 and inspect the wiring going into the lift gate once you get it opened.

The ABS sensors may not be compatible if you did not use OE or ACDelco parts when replacing the hubs. Timken and Doorman also work.

HVAC is listed as system without codes. Which is weird. I haven't been able to find anyone with a tech2 to get another scan and can't buy one yet.
I will have to look up how to do the hole saw thing do you know how big?
I used MEVOTECH wheeelbearings

 

[swathdiver]

HVAC is listed as system without codes. Which is weird. I haven't been able to find anyone with a tech2 to get another scan and can't buy one yet.
I will have to look up how to do the hole saw thing do you know how big?
I used MEVOTECH wheeelbearings

I cannot look a the computer long enough to find it but probably put the size and part numbers in my build thread "useless information". It could be that the metal or hardware from Mevotech is fine but the sensor doesn't play nice with the computer system. Had this happen before with Chicom hubs.