Q: My car won't reach full fan speed

asked by on November 10, 2016

Hey there, having problems not reaching full fan speed on my 2007 GMC Sierra. On the display it gets every fan speed but the high speed one. Just wondering if you guys think it's the blower motor resistor or what it might be?

My car has 130000 miles.
My car has an automatic transmission.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

How do I jump-start my truck?
If the battery of your truck dies, it will need to be jump-started. Jump-starting the battery is an efficient way to get power back to your vehicle. You will to need a booster vehicle to jump-start your truck. To jump-start...
How do I use the universal garage door opener?
If your car is equipped with the Car2U® universal garage door opener (optional equipment), it provides you with a handy way to operate not only your home’s garage door, but other automated systems, like remote lighting systems, gate systems and...
Reverse lights not coming on.
The reverse light switch is powered by the meter fuse and when you put it in reverse the power is sent to the rear reverse lights. The rear light socket would have to be tested (https://www.yourmechanic.com/services/reverse-light-bulb-replacement) to see if power...
Car overheating even after changing thermostat
Hello. It is possible that the radiator needs to be replaced (https://www.yourmechanic.com/services/radiator-replacement). Sometimes, flushing out the radiator (https://www.yourmechanic.com/services/radiator-flush) will solve a problem like this, but when it doesn’t, replacing the radiator is necessary. It may also be possible that your...
can I use 5w30 grade for 0w20 in engineoil for landcruiser 1ur-fe engine
Yes, per the manufacturer's specifications, 5W30 grade is the recommended oil for this motor.
concern over serpentine belt
Hello, the belt should be clean and dry when inspecting it. What could be happening is some type of fluid is leaking on the belt creating the film and smell. The fluids could be anti-freeze, engine oil or power...
I crashed my dads car into a tree 2009 Dodge Avenger
This task is best handled by a collision repair estimator at a reputable paint and body shop. S/he is trained to evaluate visible and not-so-visible damage, and the costs to repair. Contact a reputable paint and body shop in your...
Heard a loud bang when I turned on my car yesterday. 2007 Volvo XC90
Hi there - this is highly unusual behavior, and should be checked out immediately. Check for problem codes, even if the Check Engine light is not yet on. This is a misfire condition due to an over-rich condition (https://www.yourmechanic.com/question/car-backfires), possibly...
2013 BMW X3 2.0 all wheel drive, parking brake button is not doing anything 2013 BMW X3 3.0
Hi there - I don't wish to insult, but are you pressing the button, or pulling it up from the forward lip of the button? Pushing the button releases the emergency/parking brake. Pulling up on the front lip of the...

Related articles

A Buyer’s Guide to the 2007 Ford Crown Victoria
This This enduring Ford classic enjoyed a nearly two-decade run before being discontinued from the retail market with the 2007 model-year being the last. Ever-popular with law enforcement (for whom models continued in production through 2011), and senior citizens, the...
How to Buy a Good Quality Cooling/Radiator Fan Motor
Fans Fans are necessary to keep the components under your car’s hood from overheating. Excessive heat can cause warping, melting, and other damage, not to mention the additional energy suck. The radiator is one of the hottest parts in the...
How to Replace a Cooling Fan Resistor
The cooling fan may not work at all speeds if the resistor is broken. If the engine overheats or the fan never turns off, the resistor may be faulty.