Why is my heater not working on my GMC Sierra?

Why is my heater not working on my GMC Sierra?

One of the most common (and inconvenient) problems with the GMC Sierra is when it has no heat coming from the heater. Not having a functioning heater makes driving much less comfortable, and can be a sign of certain issues. At the simplest level, there are two main reasons why the heater is not working.

What to do when your car heater won’t turn off?

When I turn on my heater (moving the temp control from cold to hot), most of the time it will stay on hot even after I turn it back to cold. Not sure what to do. If I turn off the vent system completely (pushing the recirc button), sometimes after a while (an hour while the engine is still on) it’ll go back cold.

Why does my Silverado 1500 engine not start?

Restarting the engine from this state may be difficult. The fuel can vaporise due to being heated by the engine, by the local climate or due to a lower boiling point at high altitude. A vapor lock is more likely to develop when the vehicle is in traffic because the under-hood temperature tends to rise.

Why is the heater not working on my Buick Enclave?

Not having a functioning heater makes driving much less comfortable, and can be a sign of certain issues. At the simplest level, there are two main reasons why the heater is not working. If it’s not coming on at all, it’s usually either the blower motor or some other wiring issue.

Why is my GMC Sierra 1500 heater not working?

While there are a variety of reasons your GMC Sierra 1500 heater is not working, the most common 3 are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor.

Is there a problem with the ignition on my GMC Sierra?

This problem occurs in minivans, cars and SUVs as well. There has been more reports of ignition Anti Theft defects and the security light flashing in more cars and trucks. This is one of the easy fixes for the common ignition starting problem, but GM needs to recall this issue and fix it for us.

Not having a functioning heater makes driving much less comfortable, and can be a sign of certain issues. At the simplest level, there are two main reasons why the heater is not working. If it’s not coming on at all, it’s usually either the blower motor or some other wiring issue.

Why does my heater not work on high speed?

Heater blower motor will not work on high speed? I have replaced the black bosch relay behind the glovebox, the blower resistor and the blower motor and still cannot get the blower to work on high. I remember in older model years of gmc’s and chevys that their was a high speed blower relay that caused this issue.

How to fix Chevy GMC Truck heater blend door?

1999 – 2004? Chevy GMC Truck Heater Blend Door Stuck Easy Fix How-to – YouTube If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer. An error occurred while retrieving sharing information.

Why does my Chevy Silverado have no heat?

One heater hose is really hot the other is Luke warm. Probably a plugged heater core Agree. At the shop we use air and water from a rig i made up, works pretty good on a stubborn core, if it comes to that. Possible heater blend door or actuator as well if flush is no help.

1999 – 2004? Chevy GMC Truck Heater Blend Door Stuck Easy Fix How-to – YouTube If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer. An error occurred while retrieving sharing information.

Why does my Chevy truck have no heat?

If your heater core is still cold, there are four possible additional problems: first, the thermostat is stuck open, allowing coolant circulation at all times, thus never allowing the engine to warm up. You will be able to tell this from your temperature gauge, it shud be somewhere in the middle.

What kind of heater does a Chevy 1500 have?

I have a 1992 chevy 1500 4.3l 2wd. Went out to start the truck and the heater controls were black wont come on no heat or ac. I have checked the fuses all good I have also put two new controls in and nothing.

Where is the heater on a Chevy Silverado?

A. Chevy usually has a heater control valve mounted on the right rear corner of the intake manifold, the corner near the heater core. This turns on and off the flow to the heater core. there is a cable attached to it to help figuring out where it is.

One of the most common (and inconvenient) problems with the GMC Sierra is when it has no heat coming from the heater. Not having a functioning heater makes driving much less comfortable, and can be a sign of certain issues. At the simplest level, there are two main reasons why the heater is not working.

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.

Why is my car heater not coming on?

This vehicle. It may also start up the vehicle’s heating or air conditioning systems and rear window defogger. is turned to the ON/RUN position. cooling mode depending on the outside temperatures. If was set to when the vehicle was last turned off. will shut off when the key is turned to ON/RUN. If turn the heated seats on and off. See Heated Seats

Why is my Acura MDX heater not working?

At the simplest level, there are two main reasons why the heater is not working. If it’s not coming on at all, it’s usually either the blower motor or some other wiring issue. If the heat is blowing, but blowing cold, it has something to do with the coolant getting to the heater core, or the heater core itself.

When do you need a new GM thermostat?

Should you notice a change in your temperature gauge (or, like we talk about in this article, you are overheating), you may have a failing thermostat. If so, you need a new OEM thermostat. OEM thermostats are made to meet GM’s factory standards for performance, so it will be able to handle your model’s needs.

How does climate control work on a Silverados blower?

With a little time on your back and a flashlight, you maty be able to see the problem under the dash and possibly repair it. The next up level unit has two sliders for temp adjust and they have electronic control motors that move the temperature door. The premium heater case has automatic temperature control which is also electronic door control.

What to do if your air conditioner has no heat?

This can be done by warming up the engine and feeling the temperature of the inlet and outlet hoses. If the inlet is hot and the outlet is cold you may still have some blockage inside the core. I personally believe your problem is with the temperature door itself withing the heater case.

Why is the thermostat on my GMC Sierra running?

When your engine is running and generating heat, your thermostat is hard at work. It opens and closes according to the temperature of your coolant in your engine, in order to regulate the temperature of your vehicle. When one goes bad, it is usually stuck shut or won’t open enough, which traps the hot coolant in the engine, causing it to overheat.

Should you notice a change in your temperature gauge (or, like we talk about in this article, you are overheating), you may have a failing thermostat. If so, you need a new OEM thermostat. OEM thermostats are made to meet GM’s factory standards for performance, so it will be able to handle your model’s needs.

How do you remove the thermostat from an engine?

Remove the thermostat from the engine by following the upper radiator hose to where it meets the thermostat housing. The thermostat housing is where the opposite end of the upper radiator hose mounts to the engine. Drain enough coolant from radiator until it is below thermostat.

How to check for good blower, no heat?

Re: good blower, no heat.. First thing I would check is to be sure you have coolant flow through the heater core. This can be done by warming up the engine and feeling the temperature of the inlet and outlet hoses.

For this reason, there is a thermostat in the engine (at the engine end of the upper rad hose) that opens and closes. If the coolant is cold in the engine, i.e., under about 180 degrees, the thermostat stays closed and does not allow coolant to escape the engine and flow to the radiator.

What happens when there is no heat in a truck?

After about 10 minutes, it will blow warm air (not hot), but only if it’s above 40-45 degrees. Anything under that (40 and below), it blows kind of lukewarm air, barely warmer than the inside temperature of the truck. Well, not having heat makes me cold, and I don’t like to be cold at 6:45 in the morning.

If your heater core is still cold, there are four possible additional problems: first, the thermostat is stuck open, allowing coolant circulation at all times, thus never allowing the engine to warm up. You will be able to tell this from your temperature gauge, it shud be somewhere in the middle.

What causes hot engine but no heat from heater?

When the engine is warm feel both heater hoses. If one is cool and one is hot then you have an obstructed heater core (or a bad heater core valve, if it has one. some vehicles use a mechanical valve to turn the coolant flow on and off to the heater core).

How is the heat in my Silverado truck?

First, and most important problem: The heat in my truck is virtually non-existent. After about 10 minutes, it will blow warm air (not hot), but only if it’s above 40-45 degrees. Anything under that (40 and below), it blows kind of lukewarm air, barely warmer than the inside temperature of the truck.

What should I do if my GMC Acadia overheats?

You may use the wiring schematic to trace the circuit through the fuse and relay components, if everything of GMC Acadia tests fine, the fan motor has failed and needs to be replaced. The most common repair is the cooling fan motor failure. This isn’t only theory.

Can a bad coolant sensor cause a car to not start?

Some cars use the engine coolant temperature sensor to control the electric cooling fans. You have two separate temperature sensors for the fans, dashboard gauge, and engine management in most cars. However, if your car has a single sensor, a bad engine coolant temperature sensor may result in your fans won’t start at all.

What should coolant temp be when engine is hot?

With a good OBD2 code reader, you can also check the live data and the parameters of the CTS sensor. Check that the temperature value of the CTS is around 80-90c when the engine is hot. A lot of engine coolant temperature sensors have two wires and the sensor is controlled by Ohm.

Why is my GMC Sierra 2500 HD heater not working?

Learn if it’s a simple fix or time to seek out a trusted technician. Not your vehicle? Why Isn’t My Heater Working? What are common reasons my GMC Sierra 2500 HD has heater problems?

What kind of engine does GMC G2500 have?

A 2010 GMC G2500 van came into the shop with the CEL illuminated. The van has a 6.0L engine and had about 60,000 miles on the odometer at that time. The tech who was assigned the job replaced both rear O2 sensors. I don’t know his reason for doing this, as it happened to be my day off.

What to do if your heated seat is not working?

Try swapping the driver and passenger breakers and see if your issue with the drivers seat is fixed but now have the problem with the passengers seat. Sorry, that wasn’t very clear.

Why are the heated seats on my Tahoe not working?

I’m having similar issues except my passenger seat doesn’t work and none of the heated cooled seats work. They do however work on the 2nd row You must log in or register to reply here. Passenger side heated seat not working.