Question about 2003 Chevrolet Blazer

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My 2001 Chevy Blazer ZR2 is trying to shift to 4 wheel drive low range on its own. The light is flashing on the low range botton and when you attempt to shift the auto transmission from park to drive the transfer case shifts to 4 wheel low range on its own. What may be causing this?

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Have a trans shop check the linkages/sensor should be cheap unless linkage is damaged from 4wheelin
Good Luck

Posted on Jun 14, 2009

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Problems with chevy s10


have the actuator (mounted on the drivers side transfer case) checked. that is what makes the selection from 2-4 hi-4 low. it takes the place of a gear shift. they are a fairly inexpensive and easy repair (if thats the problem). i would start there providing you have checked the fuses and relays. i hope this helps.

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I have 2001 Merc 430ML what is the Low Range botton mean?


low range means you are in 'low range 4 wheel drive' push the button while the engines running and the gear shift levers in neutral to switch to high range [or 2x4] low range,cannot drive over 15 miles per hour,high range can drive up to 65 miles per hour. see the difference? you need to shift the transmission to neutral,while the engines running,and your foot on the brake pedal, push the button on the 4x4 to light up to the two wheel or rear wheel diagram. then when it lights up the 2 rear wheels, it's in rear wheel drive. if this does'nt describe your problem! please do not attempt anything and call toll free# for mercedes roadside assistance for free at 1-877-815-9962 these people have been a great asset to my buisness. thank you for choosing fixya.com

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I have an 2004 chevy blazer 4x4 and the four wheel drive does not engage on the fly and it also will not engage when in neutral. Four wheel low will work but when you press 4 wheel hi it blinks twice and...


Which of these does your vehicle have ?
The NVG 233 transfer case features a 3 button shift control switch, located on the instrument panel.
The NVG 236 transfer case features a 4 button shift control switch located on the instrument panel.
Do you know what DTC'S - diagnostic trouble codes are ? Both of these 4X4 systems can set DTC'S , Having a professional or factory scanner is what is needed to check for these codes . Not a OBD 2 code reader or autozone , advance etc... The four button system can set a bunch of them .
DTC B2725
DTC C0300
DTC C0305
DTC C0308
DTC C0309
DTC C0310
DTC C0315
DTC C0323
DTC C0324
DTC C0327
DTC C0362
DTC C0367
DTC C0374
DTC C0376
DTC C0387
DTC C0550
DTC C0611

The NVG 233 transfer case features a 3 button shift control switch, located on the instrument panel. When the ignition is in the RUN position, the transfer case shift control module starts monitoring the transfer case shift control switch, to determine if a new mode/gear position has been selected. At a single press of the transfer case shift control switch, the lamp of the new position begins flashing to inform the driver that the transfer case shift control module has received the request for a new mode/gear position. The lamp continues to flash until all shifting criteria has been met and the new mode/gear position has been reached, or has engaged. Once the new mode/gear position is fully active, the switch indicator lamp for the new position remains ON constantly.
The NVG 233 transfer case provides the driver with 3 manual mode/gear positions:
• 2HI - 2 Wheel Drive high range
• 4HI - 4 Wheel Drive high range
• 4LO - 4 Wheel Drive low range
Any of these mode/gear positions may be selected while driving the vehicle. However, the transfer case will not allow a shift into, or out of, 4LO unless the following criteria has been met:
• The engine is running.
• The automatic transmission is in Neutral, or the clutch pedal is applied on manual transmissions.
• The vehicle speed is below 5 km/h (3 mph).


Finding out what if any codes are stored should be your first step .

Feb 22, 2018 | 2001 Chevrolet Blazer

1 Answer

I have a 1984 chevy blazer, i need to know how to put in 4 wheel drive and how to take it our of 4 wheel drive. thank you


full size blazer? if so do you know if you have auto locking hubs on front or manual? the manual will have a dial to turn to lock or free. to shift into 4 high this can be done by just moving the shifter into 4hi at slow speeds. to shift into 4lo need to be in nuetral with vehicle stopped or rolling just a little bit like 1-2mph shift into 4 lo and shift back into drive same when shifting back into 2hi from low range.

Jan 13, 2011 | 1984 Chevrolet Blazer

1 Answer

I got my 2002 chevy blazer with ZR2 package into deep water and shorted out my 4 wheel drive control module (located under the kick plate on the passenger side). I took the module out and had it replaced...


what sounds like is happening is the front end is not disengaging, it will not hurt it to drive without the module, but you need to find out why the front diff. actuator is not releasing. their is a shift motor on the transfer case, module and switch in the cab, and actuator on the front diff. all are susceptable to water, I would suggest getting a manual on it to aid in diagnostics

Oct 13, 2010 | 2002 Chevrolet Blazer

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2001 Chevy s10 Blazer. I have a service 4wd light. i can dissconnect the battery and the light goes away. when i drive the 4 lo light will come on from time to time and flash like its trying to engage and...


2001 Chevy Blazer it likes to stay in 4 low. replaced sensor, pannel motor, older computern to check it was placed for a couple weeks or less it will do the same thing again. Just dies and quits has to be restarted agin still in 4 low . Tried to shift the gears slowly, Place in reverse and 2HD pressed and held while backing up this dinn't work either. To get it home I had to hold it in neutral and run the gears again ginally I got it to a shop. He is out of ideas too.

Jul 28, 2010 | 2001 Chevrolet Blazer

2 Answers

1996 chevy blazer will not go into 4wd hi but it will go in to 4wd lo. when you push the 4 Hi button it just flashes and then does nothing.


The major components to this system are a shift control motor that is mounted to the transfer case, and a shift control module that is behind your center console. since the transfer case is still shifting into 4wd lo, the shift motor is still moving somewhat, so the most likely cause is the shift control module, but there isn't an easy way to troubleshoot between the two...

Nov 16, 2009 | 1996 Chevrolet Blazer

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