Bombas de vacío para automóviles y camiones para GMC

Vacuum Pumps for GMC

Vacuum pumps are always at work supplying power to various components of your GMC truck or SUV. When vacuum pumps begin to deteriorate, it is easy to mistake the symptoms for other maintenance problems. Understanding how vacuum pumps work will help you quickly diagnose problems and solve them before your vehicle suffers any significant damage.

What does a vacuum pump do in a GMC truck?

A vacuum pump is an electric air pump that sits behind the engine near the brake booster and master cylinder and operates continuously as the cylinders fire. It provides your vehicle with the vacuum power it needs for correct operation of your brakes, heating system, and air conditioning.

How does a vacuum pump work in a gasoline engine?

Gas engines create a limited amount of vacuum power and therefore require a pump to produce supplemental energy. This pump releases the pressure built up in the engine crankcase to power pulleys and belts that perform various functions, including the AC, alternator, and braking systems.

How does a vacuum pump work in a diesel engine?

Diesel engines do not create any vacuum power during operation, and they require a pump to generate the necessary energy to operate auxiliary systems such as the brake system. If the pump fails, your GMC truck could lose breaking power and become unsafe to run.

What are the most common symptoms of vacuum pump failure?

    Combined with poor performance, these are the most prominent features of pump failure:

  • Poor or declining fuel economy. When the vacuum is not operating properly, exhaust cannot leave the combustion chamber. You will then notice reduced engine performance since fuel is not burning efficiently.
  • Hissing noises. When there is a leak, you will also hear air escaping..
  • The brake pedal is hard to press. You might notice that the brakes feel rough and hard to press due to low vacuum pressure, especially with diesel engines.
  • Heat and air conditioning controls do not work properly. You will notice that either the controls do not work properly or you get no heat or air at all.
  • Visible oil leaks. Since the vacuum requires oil for optimal functioning, an oil leak could signal a problem with the pump. Oil leaking due to a faulty pump can lead to major mechanical failure in your GMC truck or SUV.
Can the vacuum pump on a GMC truck be repaired?

The factory-installed pump should last for the lifetime of your vehicle. Since it is not a serviceable part on which you can perform routine maintenance, you will need to replace your vacuum pump when it fails. Keep in mind that vacuum line leaks often have symptoms like pump failure. Once you have inspected and eliminated line leaks as the problem, you will need to remove the faulty pump and replace it with a new one.

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