Question about 2000 Chevrolet Blazer

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My 98 chevy blazer won't shift into 4wd.

We I push the auto 4WD or 4HI the light will blink and then it kicks back over into 2WD. Won't go into 4wd. It works fine in 2HI, but if I try to engage Auto 4WD or 4HI or 4LO, then the lights blink for a VERY long time, and then it goes back into 2HI.

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  • Anonymous Mar 15, 2014

    2002 chevy blazer ls rz2

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Most common problem is the vacuum diaphragm that is so inconviently mounted UNDER the battery tray.The cable that locks in the front diff is attached to it and vacuum pulls it in/out.

Posted on Dec 23, 2008

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My 1997 GMC Sierra lights for 4hi and 4lo blink when i push the 4hi button and then goes back into 2hi. but when i push 4lo it locks in and works fine. I tried changing the 4wd motor on the transfer c


THE TRANSFER CASE MOTOR IS ONLY FOR 4WD LOW. That would have never been the problem as soon as you confirmed it shifted into 4wd Low. 2wd and 4 Hi work off of vacuum. You may have one or two issues. A vacuum leak up by the front axle that engages the 4wd HI or the sensors on the transfer case.

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Service 4wd light


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I just bought a 2001 blazer 4.3 4wd and it was stuck in 4 low


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My 98 chevy blazer won't shift into 4wd.


Had the same problem, disconnected the battery for about fifteen minutes, reconnected, 4 wheel drive hi and lo work like a charm now.

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