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

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: I've already purchased pads which are Full Ceramic, considering purchase of the Rotors also which would be upgraded to drilled.

The only replacement parts that have actually been tested and approved for use on your vehicle are the OEM (dealer supplied) parts. Aftermarket parts, in almost all cases, are not the preferred option. Regarding alternative brake parts or alternative designs...

Q: My driver side door lock only works intermittently

Hi there. There should a rod connecting the door lock cylinder to the lock assembly that is held in place with a plastic clip. These clips do become brittle over time and can break easily, whether by using a slim...

Q: Carburetor issues

Too many intake cleaning solutions at one time often cause more harm than good. The carburetor fueling may be the problem where the engine gets plenty of air, but too little fuel and stalls. I recommend having an experienced technician...

Related articles

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...