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A/C worked fine yesterday. This morning it doesn't. When I
A/C worked fine yesterday. This morning it doesn't. When I press the button for the A/C, the light blinks a few times and goes off. I tried turning the system off and then turning it back on with no r… read more
Pete
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AC light blinks 3 times and goes out, the light on the ac
the light on the ac button, flashes 3 times goes out and ac doesnt run … read more
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2001 Yukon, The switch to turn on or off heat to AC (open or close) is not working. The rear AC is cold the fount dose not get as cold as it should. Freon when checked with gauges was a little high.… read more
sprinkles08
sprinkles08
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I have a 2001 GMC Yukon 4WD 5.3l. with both front and rear
I have a 2001 GMC Yukon 4WD 5.3l. with both front and rear a/c climate control. I lost cooling and so I replaced the compressor, accumulator and orfice filter. vac ed the system and added 3# ***** R13… read more
HDGENE
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My 2004 GMC Envoy SLT (6 cyl) has been having intermittent
My 2004 GMC Envoy SLT (6 cyl) has been having intermittent AC issues. I noticed a leak at the accumulator, so I replaced it and the orifice tube, vacuumed it down and charged it last night. It worked … read more
Gary
Gary
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Vocational, Technical or Trade Scho
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i have a 2004 gmc yukon slt and "sometimes" "not all the time" while im idling at a red light the break pedal slowly goes to the bottom and if i press it firmly after it goes to the bottom you hear a … read more
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Eric
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N/A
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GMC Yukon 4x4: Hello, I have a 2005 GMC Yukon 1500 SLT,
Hello, I have a 2005 GMC Yukon 1500 SLT, 5.3L V8, 393,000 miles. The rear air is not working. The blower is not coming on. I am able to power on the rear aux switch, it lights up, set the temp, and se… read more
Jerry
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GMC Sierra: 97 GMC Sierra C1500, 5.7L, Automatic Trans Pickup Why
97 GMC Sierra C1500, 5.7L, Automatic Trans Pickup Why doesn't A/C work? Clutch will not cycle on Compressor. New Compressor, new clutch cycling relay. Can ground grn/wht wire at base of Compressor Clu… read more
Randall C
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Vocational, Technical or Trade Scho
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GMC Yukon SLT: I have a 2001 GMC Yukon SLT with 5.3 vortec
I have a 2001 GMC Yukon SLT with 5.3 vortec engine I blew a brake line on my way home from work have been online for four hours trying to find out what diameter steel brake line I need to get so I can… read more
Dave Nova
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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 serria: Having a problem with my 2000 gmc serria A/c syatem.
Having a problem with my 2000 gmc serria A/c syatem. The cold air cuts out intermittingly. Ths air is cold so I don't suspect the freon and the suction line sweats cold. I have swapped the horn relays… read more
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GMC Yukon: I have a 2002 Yukon and the rear a/c is not blowing
I have a 2002 Yukon and the rear a/c is not blowing cold air. Actuator seems fine. Rear a/c is not engaging compressor… read more
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GM Yukon: Problem with evaporator icing on drives longer than
Problem with evaporator icing on drives longer than 10 minutes at ambient air temperatures less than 88-90 degrees with shorter times as ambient temperature goes lower and longer times as ambient temp… read more
Amedee
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GMC Yukon SLT: I have a 03 GMC YUKON and my a/c works fine
I have a 03 GMC YUKON and my a/c works fine in the front but when i turn on the rear a/c at the top of the truck it blows hot air out of the rear vents that should blow cool air to cool the back of th… 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)
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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
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GM Yukon XL: I have a 2000 GMC Yukon XL SLE 5.3L V8...The A/C
I have a 2000 GMC Yukon XL SLE 5.3L V8...The A/C blows real COLD air when it is working, but we have an intermittent problem. I have replaced the low pressure switch. While driving or sitting the comp… read more
relicdigger3
relicdigger3
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GM Yukon SLT My 2005 GMC Yukon will only generate heat when
My 2005 GMC Yukon will only generate heat when I go down the road. i can let it warm up forever and the heat does not defrost or heat the cab up. It it the thermostat, the Yukon does not over heat. Te… read more
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Vocational, Technical or Trade Scho
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Gm Tech (Cam)

Gm Tech (Cam)

GMC Mechanic

1,832 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)

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54,693 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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