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

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・Save up to 30%

Get a quote

What others are asking

Q: It will not start and the headlights and hazard lights are blinking

GM vehicles equipped with the PASS-KEY or VATS anti-theft system usually require the system be reset whenever the battery is drained or replaced. Follow this procedure. Step 1 – Attempt to start the vehicle. It will crank, but not run....

Q: rough idle dies at 65 hesatation

Hello. Thanks for writing in about your 2002 Chevrolet Silverado. This can be caused by a number of things. Most of the time this will cause a Check Engine Light to come on if there is a powertrain issue. If...

Q: Fuel pump not pumping gas. 1996 Chevrolet Blazer

Hey there, thanks for writing in about your 1996 Chevrolet Blazer. If you hear the pump, but still get no fuel out of the pump, then you have the power and ground backwards in the wiring or they have it...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...