Why is my GMC Sierra 2500 HD not working?

Why is my GMC Sierra 2500 HD not working?

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 2500 HD has air conditioning problems?

Is the GMC Sierra a / C compressor clutch not engaging?

I have an 01 gmc… I have an 01 gmc sierra with 5.3. The A/C compressor clutch is not engaging. I have checked all the fuses the light on the button comes on but it does not even try to start. What direction do I go first?

Why does my GMC Sierra AC not work?

While there are a variety of reasons your GMC Sierra 2500 HD 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?

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.

While there are a variety of reasons your GMC Sierra 2500 HD 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?

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 2500 HD has air conditioning problems?

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.

What to do if your a / C compressor won’t turn on?

Have someone watching the A/C compressor while you start the truck and turn the A/C on. If the compressor cycles on, turn it off. You now just narrowed it down to either low refrigerant or a bad pressure switch. Keep it Professional Grade. Use Genuine GM Parts Cut your fingernails. That’s not me. And spell your name right.

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.

What kind of engine does GMC Sierra 3500 have?

Sierra 3500 Heavy Duty truck comes in 2WD and 4WD Regular Cab with an 8′ long bed SRW or DRW configuration. Requires Sierra 3500 HD Regular Cab Long Bed 2WD DRW with available Duramax 6.6L Turbo-Diesel V8, Max Trailering Package and gooseneck hitch.

What causes intermittent operation on a Silverado Sierra?

Rockauto has them for like 30 bucks so it isnt a huge parts cannon projectile to try. The electrical schematic indicated it has a rheostat for fan speed control I just wanted to be sure that is what you have. Rheostats can get bad spots (worn or dirty) that will cause intermittent operation when you stop the control at one of these spots.

Why is my Silverado Sierra blowing cold air?

After fiddling with the controls a bit I gave up and rolled the windows down. About five minutes later it was eating at me so I switched the control from off to max and the fan kicked on like it was supposed to and was blowing cold air.

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.

Is the fan speed set or intermittent on a Silverado Sierra?

Just the blower is intermittent, not the compressor. Fan speed does not have set speeds, it’s more like a rheostat. It has the rotary control.

What kind of HVAC unit does a GMC CK have?

I reverse engineered the AC Delco 15-72548 Heater AC Control Unit. This schematic is pretty accurate, but there are some component values / types missing, either because I could not decipher the part numbers, or I did not remove them from the circuit to measure them.

How much does a GMC Sierra AC cost?

If this occurs, fault code (s) should be stored in the HVAC control module which should assist in diagnoses. The average cost for a GMC Sierra 2500 HD AC Diagnosis is between $53 -$67. Learn More

I reverse engineered the AC Delco 15-72548 Heater AC Control Unit. This schematic is pretty accurate, but there are some component values / types missing, either because I could not decipher the part numbers, or I did not remove them from the circuit to measure them.

Where does the air come from on a GMC Sierra?

Any suggestions on a good repair manual that will cover the A/C systems and circuitry. Air only comes out dash vents. Changing to floor or defrost switch position does not change air flow. I’ve got a problem I got hot air coming out the vents on the driver side,and cold air on the pass.side that includes when im running the air.

The GMC Sierra 2500 HD uses a throttle position sensor (TPS) which commonly fails and causes: This issue is related to the throttle position sensor, and can be caused by faulty wiring to the TPS, bad connection at the TPS, or a failed TPS.

What kind of engine does a GMC 3500 need?

Requires properly equipped 3500 Regular Cab DRW Long Box 2WD model with available 6.6L Duramax Turbo Diesel engine and gooseneck hitch. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual.

Can a Duramax be used in a GMC Sierra 1500?

For instance, we can control the engine block and the engine head separately to maximize the effectiveness of the cooling system,” Barta explains.

What causes a Chevy 2500HD to lose power under load?

Probably P0087. Check the fuel hoses at the side of the trans– they can get kinked, weak and collapse. I’ve just experienced a very similar situation with my 2005 2500HD. After driving about 2 hours, over varying terrain, I had to stop at a light (not the first on the trip).

Why does my Duramax say reduced engine power?

If you’ve got a Duramax diesel, the Reduced Engine Power warning could Illuminate for a variety of reasons. There are many different technical service bulletins (TSBs) for Duramax-powered vehicles that mention Engine Reduced Power mode.

What does the reduced engine power warning mean?

Asking what engaged reduced engine power warning message is somewhat like asking what turned on your check engine light —there are too many possibilities to list. Plus, GM has changed its fail-safe strategies over the years, so exactly what can engage the message depends on the year and model of your vehicle.

Why is my Check Engine light not working?

The most common cause is a faulty TPS. The average cost for a GMC Sierra 2500 HD Check Engine Light Diagnosis & Testing is between $88 -$111. Learn More

What causes a GMC 2500 diesel to stop running?

My GMC 2500 6.6L Duramax Diesel stopped running and will not start. Turns over but sounds like it gets no fuel. Has happened in past and dealer fixed short in wire. That time it would blow fuse but not this time. Submitted: 10 years ago. Category: GM Experience: GM Grand Master Technician 2007. 14 years experience. Hello, I’m Cam.

Where did the GMC Sierra 2500HD come from?

1st owner purchased on 03/09/06 and owned in SD until 10/14/14 • 2nd owner purchased on 12/30/14 and owned in SD until 01/09/19 • 3rd owner purchased on 01/19/19 and owned in NE until 06/07/21. 1st owner drove an estimated 7,556 miles/year • 2nd owner drove an estimated 8,358 miles/year • 3rd owner drove an estimated 12,638 miles/year.

What kind of engine does a GMC 3500 have?

Requires properly equipped 3500 Regular Cab DRW Long Box 2WD model with available 6.6L Duramax Turbo Diesel engine and gooseneck hitch. Before you buy a vehicle or use it for trailering, carefully review the trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

What kind of job does GMC Sierra 2500 do?

Built for heavy-duty, the GMC Sierra 2500 HD is at home on ranches, at construction sites and towing trailers and boats. It also boasts a lot of passenger room for the entire family and their gear. It comes with a number of engine options, which means you can buy the package you need for the job.

What kind of air valve for GMC 2500HD?

I installed these on my 09 GMC 2500HD to assist towing a 29′ 5th wheel. VERY happy with the improvement over bounce and harshness of bumps and leveled the truck perfectly. I also installed a T and only one air valve so they would always have equal pressure.

What happens when GMC Sierra engine power is reduced?

When the engine power has been reduced, the engine and transmission can operate in totally different ways. This leads to jerky shifts, unstable acceleration, and horrible gas mileage. Good luck diagnosing your Sierra’s reduced engine power light. If there is anything that you would like to add, please feel free to leave a comment below.

What kind of engine does a 2003 Silverado have?

Just for reference, my truck is a 2003 HD1500 crew cab with the 6.0 Vortec that has just over 200,000 miles on the clock. The last few winters when it would get at or below about 10 F I would get the REP message and check engine light on the dash, could only go about 15 MPH tops when it happens, very inconvenient and dangerous to say the least.

What to do if your Chevy Silverado has reduced engine power?

After it has warmed up, turn on the A/C (if so equipped) in park for 10 seconds, leave the A/C on and put it in drive for 10 seconds, leave it in drive and turn the A/C off for 10 seconds, then put it in park and turn the vehicle off and you’re done! Restart and take it out for a drive to see how it runs.

The GMC Sierra 2500 HD uses a throttle position sensor (TPS) which commonly fails and causes: This issue is related to the throttle position sensor, and can be caused by faulty wiring to the TPS, bad connection at the TPS, or a failed TPS.

Where is the power switch on a Silverado Sierra?

Open your main fuse panel under the driver’s side hood. You will see a four pin relay holder for your rear window defroster (If you don’t have the defroster option) The inboard terminal will be hot with key on. If you have rear defroster, of course this won’t work because the receptacle is already in use.

Where is the SPDT relay on a Silverado Sierra?

If you do need more power, you can also still use this circuit to switch a relay such a Fancke JD1914J (12V 100mA coil, SPDT relay) and routed power through it from one of the two studs at the front of the underhood fuse panel. One mine these studs are connected to fuses 63 and 68, but again, this may differ on your model.

What kind of power source does a Chevy Silverado use?

Drivers side has a dedicated stake for switched power (or RPO as chevy calls it) Just use a inline fuse with a standard female spade connector. You will also find that mini add a fuse is useless as these trucks use a new standard in fuses called Micro2 (different from micro).

What kind of engine does GMC Sierra Denali have?

Sierra HD Denali was built strong so you can tow strong — with its large drive shaft and real axle, the power of the available Allison ® 10-speed automatic transmission, the first in a heavy-duty truck in its class, and available 6.6L Duramax ® Turbo-Diesel V8 engine is maximized so you can tow with command and control.

How big is a GMC Sierra 3500 HD Denali?

Sierra 2500 HD Denali truck comes in 4WD Crew Cab with 6′ 9″ standard box or available 8′ long box. 158.95-172 IN. 68.1/68.3 IN. 10.08–10.12 IN. Sierra 3500 HD Denali truck comes in 4WD Crew Cab with either a 6′ 9″ standard box or available 8′ long box. Long box is available with an SRW or DRW configuration.

Open your main fuse panel under the driver’s side hood. You will see a four pin relay holder for your rear window defroster (If you don’t have the defroster option) The inboard terminal will be hot with key on. If you have rear defroster, of course this won’t work because the receptacle is already in use.

How do I connect my GMC to a WiFi hotspot?

Make sure your GMC is either running, or its ignition is switched to the “accessory” position. 2. Open the Wi-Fi settings page on the IntelliLink infotainment system to find information you’ll need for connecting to the Wi-Fi hotspot.