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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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.

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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...

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