Skip the auto shop - Our mechanics make house calls

Q: Truck not going into four-wheel drive

asked by on

My truck will not go into four-wheel drive. The switch is not coming on.

A: There are several things that can go wrong ...

There are several things that can go wrong with the system on a Blazer. The switch is a part of the system and can possibly not be making good contact. There is a motor on the transfer case that engages the 4 wheel drive that can also fail. This is not very common but it does happen. Lastly the electronic actuator in the differential can also fail, causing it not to go into 4 wheel drive. The actuator is what locks the front differential when you activate the 4x4. Actuator failure is quite common. I suggest seeking help from a qualified mechanic to help you with this issue.

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・Save up to 30%

Get a quote

What others are asking

Q: Car shuts off unexpectedly

Engine stalling while driving is typically caused by a problem with the ignition system. Plus, the fact that you can restart the vehicle after cycling the ignition leads me to believe the problem is electrical. The first thing I would...

Q: Won't shift into 3rd gear and bogs down after 2005 Chevy Blazer

This sounds like you may have internal transmission issues on your 2005 Chevrolet Blazer. It could be caused by low transmission fluid, a faulty shift valve, or possibly burned clutches. Smell the transmission fluid. If it smells burnt, then you...

Q: Rough idling and shaking on a 2000 Blazer

You're a lucky man, you've had that thing for seven years and this is the first problem you have. I'm assuming you don't drive that many miles. On those, a lot of times it is a vacuum leak. I've got...

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...
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...
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...