Why is my AC not working on my GMC Sierra 1500?

Learn if it’s a simple fix or time to seek out a trusted technician. Not your vehicle? Why Isn’t My A/C Working? What are common reasons my GMC Sierra 1500 has air conditioning problems?

Why does my car AC blow cold air then blow warm air?

But that cold air turns warm fairly soon after because the high side pressures build to the point that the high pressure switch shuts off the compressor clutch. Once pressures equalize, the high pressure switch allows the compressor to start up again. The cycle repeats over and over, providing a short period of cold air, followed by warm air.

What to do about AC intermittently blowing hot air?

The permanent solution isn’t very hard or expensive. http://chevroletforum.com/forum/silverado-…lacement-22624/ The temporary fix is to turn the truck off and back on. That usually fixes mine for a few days. I pulled my actuator out the other day to see for myself.

Where can I find the part number for my Silverado AC?

Thanks to their wonderful website, there is no direct link or part number. When added to cart it shows as “Air conditioner and heater, Evaporator and heater components, Actuator, Mode temp and def, Mode temp and def – 2003-07 – 2003-07” Somewhere along that path, you will see a View Illustration button.

Why is my GMC Sierra not blowing cold air?

One of the most inconvenient vehicular problems is when the A/C won’t blow cold air. If your GMC Sierra isn’t keeping you cool, we’ve outlined some of the most common reasons why this might be happening. The only thing that the air conditioning system has in common with the heater is that they both use the climate controls and the blower motor.

Why does my GMC Sierra 1500 not work?

While there are a variety of reasons your GMC Sierra 1500 air conditioning won’t work, the most common 3 are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor. What will be the outcome of an air conditioning system diagnosis?

When did my GMC Sierra air conditioner stop working?

I had a 2001 GMC Sierra that did this when truck was less the one year old (summer of 2001 is when it was). The dealer had the truck in the shop idling for a long time and the A/C worked perfectly. I told them to take it for a ride and see. So the service manager in an effort to convince me nothing was wrong went for a ride with me driving.

Why is my 2000 Silverado RCLB getting cold?

My 2000 Silverado RCLB was getting cold initially then dwindling down to just ambient air temps. Checked the running pressure and it was to the low side of normal. Sometimes it would do this and other times it would not, Shut the AC off for a few minutes and then turn it back on and BAM cold air again…

Are there transmission problems with a 2003 GMC Sierra?

After five years, most of the issues with these trucks had been worked out. Now, these trucks are getting older, and it’s very likely that your 2003 Sierra may be having transmission problems. Below, you’ll find a ton of troubleshooting your transmission problems.

When did the GMC Sierra have the most problems?

The model years with the most problems reported were 2004 and 2007, with more than 60 complaints each year, followed by 2002, 2003, 2005, and 2010, with more than 40 each year. Of the 112 problems, five different complaints have been reported 90 or more times.

Why is my GMC Sierra not moving in any gear?

It is pretty applicable to the 4L80E as well. Not Moving in any Gear – If your 2003 Sierra Transmission has a problem moving in any gear, it’s likely caused by a lack of transmission fluid. No matter how silly that sounds, and how convinced you are that it’s not the problem, go ahead and check it anyway.

Learn if it’s a simple fix or time to seek out a trusted technician. Not your vehicle? Why Isn’t My A/C Working? What are common reasons my GMC Sierra 1500 has air conditioning problems?

Why does my GMC Sierra 1500 get hot?

GM needs to issue Campaign to correct this problems, since so many of their customers are experience problems due to their poor workmanship or inferior design. I haven’t fixed it yet, but when driving with Air conditioning running, just the drivers side gets hot, the passenger side stays cool.

What was the a / C problem on my 1998 Silverado?

One day last year, I started my 1998 C-1500 350 2WD, and surprise – the a/c blew hot air. I said a bad word. I only use the truck to go to the lumber yard, so I just let it be – until today, when it was 98F and I got stuck in a 10-mile traffic jam (I said many bad words).

Why is my Chevy Silverado not 4 wheel drive?

Over time, dirt, moisture and corrosion can affect the contacts on the bolts used to attach the wires to the frame. If you have a 2008 Chevy Silverado with 4-wheel drive problems, or a similar GMC or Chevy truck from another model year, replacing the switch will solve the issue.

What are the most common GMC truck problems?

One of the most common 2007-2013 GMC and Chevy truck problems owners experience is excessive oil consumption. This problem led vehicle buyers to launch a class-action lawsuit against GM, which alleged 2010-2013 vehicles with Generation IV 5.3 Liter V8 Vortec 5300 engines were defective.

Why is the a / C on my GMC truck not working?

So I took my truck to a mechanic to look at the a/c. It runs and gets somewhat cool but does not get cold. Not even cool enough in 85 degree temps to be comfortable. He checked the freon levels and they were actually high so he got it to the normal levels. No leaks. He checked the filter and it was good but went ahead and replaced it.

What are common reasons my GMC Sierra 1500 has air conditioning problems?

What are common reasons my GMC Sierra 1500 has air conditioning problems? While there are a variety of reasons your GMC Sierra 1500 air conditioning won’t work, the most common 3 are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor.

Why is my GMC Silverado not getting cold?

The guy at the shop obviously didn’t take it for a ride, or even put a thermometer in the vent. My 2000 Silverado RCLB was getting cold initially then dwindling down to just ambient air temps. Checked the running pressure and it was to the low side of normal.

What kind of air conditioner does a GMC Sierra have?

Gm already issued a TSB for the 2015 – 2017 tahoes, yukons, and escalades with the same engines and equipment as my 2015 GMC sierra with 45000 mi. TSB # 17336 air conditioning condenser (combi-cooler) refrigerant leak. The air conditioning started blowing hot air while moving. The truck is only 4 years old with 75000 miles on it.

Are there any problems with the GMC Sierra 1500?

Other Equipment related problems of the 2015 GMC Sierra 1500 Equipment problems 37 Air Conditioner problems 9 Carrier/rack problems 4 Owners/service Manual problems 2 Radio/tape Cd Player problems 1

Can a GMC Terrain air conditioner not blow cold?

It is entirely possible for your Terrain’s heater to work just fine even when the air conditioner is not blowing cold at all. That’s why troubleshooting the air conditioner is totally different than troubleshooting the heater. GMC Terrain Air Conditioning Not Blowing Cold Causes

Why is my a / C not working in my 2015 GMC Sierra?

2015, 50k miles, A/C starts blowing warm air. I’m an HVAC tech, checked refrigerant charge with gauges, it’s low. Some quick research reveals a known issue with condenser failures, top right corner, look for the oily spot. Dealer wouldn’t do anything, will repair myself with aftermarket.

What kind of HVAC does a Chevy Silverado have?

Access our free HVAC Systems Repair Guide for Avalanche, Sierra, Silverado, C&K Series, 1999-2005 through AutoZone Rewards. These diagrams include: Fig. A/C Compressor Controls (c) (2005) Fig. Air Temperature Actuators Left and Right (c) (2005) Fig. Power, Ground, Serial Data and Blower Motor Control (c) (2005) Fig.

Where is the fuse block on a GMC Sierra?

The center instrument panel utility block is located underneath the instrument panel, to the left of the steering column. The underhood fuse block in the engine compartment on the driver’s side of the vehicle near the battery. Lift the cover for access to the fuse/relay block.

How to repair Chevy Silverado Avalanche and GMC Sierra?

Access our Avalanche, Sierra, Silverado, C&K Series, 1999-2005 HVAC Systems Repair Guide Hvac Schematics by creating an account or signing into your AutoZone Rewards account. Once you sign in, follow these instructions to access our Repair Guides. Add your vehicle in Manage My Vehicles. Enter your vehicle details.

Is the blower resistor on my GMC Sierra on fire?

This was preformed on a 2004 GMC Sierra with a blower resistor that had been on fire and melted the wiring. Loading…

How do you test a / C on a GMC CK truck?

TESTING LOW PRESSURE SWITCH. With the truck running, A/C turned on. Check the Dark Blue wire at the low pressure switch for +V with the switch Disconnected. Check for ground on the black wire. With the switch plugged in BOTH wires should show ground.

What causes a GMC CK HVAC unit to malfunction?

This is caused by an open Switched +12V power transistor, or it could possibly be caused by a defective blower speed switch. This is caused by a shorted Switched +12V power transistor, or it could possibly be caused by a defective blower speed switch.

What does switched + 12v do on a GMC CK?

The purpose of Switched +12V is to prevent the AC compressor from running when the blower is not running. Without the blower the evaporator and AC lines could ice up. It is a mystery why GM / AC Delco decided to disable all other functions such as Mode and Recirculation doors when the blower is not running.

Why is the a / C on my 1992 Chevy not working?

Have a competent A/C tech check your freon charge, my money is on it being low. Re: 1992 AC Problems-Blinking A/C and not working.. A/C blinks and won’t work. If the battery is disconnected it will work again but it will go into the not working mode sooner or later.

Why does my GMC P / you compressor not turn on?

No. Theres a schrader valve to prevent freon from escaping when you replace the switch. Just make sure you dont overtighten it. This is on a 2004 gmc p/u I have checked the fuse and relay all good. I have jumped high pressure switch .I have no power going to the high pressure switch wiring is good.

Navigation