Skip the auto shop - Our mechanics make house calls

Q: My 4WD is not engaging. Is a 2007 Silverado have electronically controlled axle actuator or vacuum? Or is my problem in the hubs?

asked by on

Wont fo into 4wd. No front wheel spin or mobement at all.

My car has 238 miles.
My car has an automatic transmission.

A: Hi there. The actuator on your 4WD system ...

Hi there. The actuator on your 4WD system to your vehicle is electronic. Most of the Silverado 2500 model Chevrolet trucks have issues with the actuator failing in the front axle due to weather and road conditions. Check the harness to the actuator and make sure that it is connected to the actuator. If a tree limb was ran over, its possible to rip the wiring out of the actuator. If the wires are intact to the actuator, the I recommend replacing the actuator before replacing the hubs. If you have a grinding noise in the front by the wheels, then the locked hubs have worn teeth and needs replaced. If you need further assistance with your 4WD not working, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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

Get a quote

What others are asking

Q: Gas pedal needs to be pressed down farther than normal before it works

The throttle pedal sensor and the throttle body sensor need to correlate to each other or the computer goes into limp mode and will not accelerate properly. A test to move the throttle body and throttle pedal position needs to...

Q: My actuator works backwards

Hello. We will need to observe several other factors in order to pinpoint what the issue is. When you say you are turning on the vents, what setting are you turning on when this happens? Is it all temperature settings...

Q: can cup hands over carburetor when its running and it will not stall

Hello and thank you for your question. Yes, you are right but only if you have completely shut off the air intake at that point. Not sure that cupping your hands will do it but surely you can be the...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...