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Low side: 55 psi High side: 145 psi Temp: 85 Problem:
Low side: 55 psi High side: 145 psi Temp: 85Problem:Normally will blow cool air out of both front and back systems (dual a/c with a rated 134a amount of 45 oz)As long as car is on, system will functio… read more
roy
roy
Associate Degree
3 satisfied customers
2005 GMC Yukon XL, dual control ac/heater, ac mode cooling
2005 GMC Yukon XL , dual control ac/heater, ac mode cooling great then changes to heater mode blowing very hot heat ,temp dials set at 60 … read more
eric remington
eric remington
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2010 GMC Sierra 4.8L (AC/Heating manual Temp selection, base
2010 GMC Sierra 4.8L (AC/Heating manual Temp selection, base model) Getting a thumping noise when turning the heater or a/c on, when engine is cold. It only occurs about 5-10 sec after I turn the heat… read more
Triston
Triston
High School or GED
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I have a 2008 GMC Acadia. My original complaint was the A/C
I have a 2008 GMC Acadia. My original complaint was the A/C wasn't blowing cold..additionally it would blow cool (not cold) then it acted as though he compressor stopped working and then would blow wa… read more
Pete
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Cary York
Cary York
High School Diploma
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2006 Yukon Denali Coolant Temperature Hot comes on display
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JFN1
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Gary
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GM yukon denali xl: I have a 2003 yukon denali xl. after a
I have a 2003 yukon denali xl. after a dead battery the front dual climate control began to not function properly, heat would blow on one side and ac on other. Then no cold air at all. it still blows … read more
Gary
Gary
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GM Sierra: Hello, I have a 99 gmc sierra and i can not get
Hello, I have a 99 gmc sierra and i can not get the a/c compressor to engage.I tried jumping the pressure switch with a paperclip and it made no difference. It will engage if jump the relay terminals … read more
Dave Nova
Dave Nova
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GMC Yukon 4x4: I have a 2000 GMC Yukon. I am having intermitent
I have a 2000 GMC Yukon. I am having intermitent Heat Issues. The Rear (Aux) Heat works fine but the Frount Heat Comes and Goes. I am getting good flow through the Heater Core so i dont think thats th… read more
tripletauto
tripletauto
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gmc yukon: 2005 gmc yukon front defrost fan wont blow when
2005 gmc yukon front defrost fan wont blow when first turned on. after vehicle warms up then usually works. also noticed when vehicle cold.. start car no fan . shut off car wait 1-2 minutes then start… read more
Dave Nova
Dave Nova
GMC Technician
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GMC Sierra 1500: have a 2005 sierra with 138K miles. got
have a 2005 sierra with 138K miles. got a radiator flush and two days later, the A/C would only issue hot air. took to Champion and they said it was working fine, but now the A/C is blowing only a a f… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
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GMC Yukon 4x4: working on a 1997 GMC SUV 5.7L . Tha a/c blows
working on a 1997 GMC SUV 5.7L . Tha a/c blows cold just not very hard. It has all the speeds. You can hear the air coming out and change speeds. I know it is suppose to blow harder because i have the… read more
Hal
Hal
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GM sierra: We had the A/C going today was working fine on all
We had the A/C going today was working fine on all setting recirculate on high when we stopped the truck got back in and got going the blower wasn't working at first but in a few seconds came back on … read more
Pete
Pete
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GMC Savana 3500: 2004 GMC Savana Cargo 3500, 6.0 engine.
2004 GMC Savana Cargo 3500, 6.0 engine. 177k miles. When using A/C at idle normal temp. But when using heater temp goes up to 210 when idle. Is this normal? BTW New waterpump and thermostat and i also… read more
Dave Nova
Dave Nova
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GMC Yukon Denali: I have a 2006 GMC Yukon Denali that I am
I have a 2006 GMC Yukon Denali that I am working on. The a/c will work perfect, pressures at 32 and 200 with no rear air on. Then every once in a while the a/c will blow warm air and the a/c indicator… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,823 satisfied customers
GMC Yukon: I have a 2001 GMC Yukon SLT. The front blows cold
I have a 2001 GMC Yukon SLT. The front blows cold AC, but no heat. The rear only blows hot but no cold. I replaced and re-calibrated the air door actuator. Any ideas what else it could be??… read more
Dave Nova
Dave Nova
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GMC Sierra 3500 Classic SLE: Hi Cam how are you? Im back with
Hi Cam how are you? I'm back with another question. back in Oct 11 I asked about a problem I had with my truck's A/C switching from cold to heat on driver's side thanks to your answer that problem was… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,823 satisfied customers
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Meet the Experts:

Gm Tech (Cam)

Gm Tech (Cam)

GMC Mechanic

1,823 satisfied customers

GM Grand Master Technician 2007. 14 year experience.

Gary

Gary

ASE Certified Technician

1,589 satisfied customers

GCM master tech over 25 years

Dave Nova

Dave Nova

GMC Technician

929 satisfied customers

ASE Master Certification. GM World Class Certification

Chris (aka-Moose)

Chris (aka-Moose)

GMC Technician

54,209 satisfied customers

16 years of experience

Ron Z.

Ron Z.

- GMC Tech -

285 satisfied customers

18+yrs experience. State Inspector & GMC Diagnostics/Repair

JFN1

JFN1

ASE Certified Technician

272 satisfied customers

GM Master Technician

George H.

George H.

ASE MasterTechnician

230 satisfied customers

15+ Years ASE Master Technician with Level 1 Certification

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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