Question about 1999 Chevrolet Blazer

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Its stuck in 4 lo and wiil not come out good vacume changed dash switch so '

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The Tranfer case encoder motor is not receiving th signal . I would have it replaced. The part is located on the transfer case and is held in by 4 bolts. Very easy to replace yourself if you want to try.
Just un plug the connector to it, loosen up the bolts. and changed the part out.

Posted on Jul 18, 2009

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1999 chevy blazer 4x4 The 4 wheel drive dash switch is brand new. When in 2 wheel drive none of the buttons light up. When I push 4 hi the 4 hi and 4 lo button lights light up and seems to be in 4 hi. When...


It could be a junk switch or it could be bad contacts inside the transfer case motor.. Does the transfer case switch to the selected gears? Everytime? If so, you might try another switch. If it does the same, I would say the motor contacts are bad. Replace the motor if you want the lights, But I personally wouldn't do it until the motor quit switching gears. They're not cheap.

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2006 trailblazer indicates 4 lo but is in 2 wheel drive


Switch may be bad. Change switch should fix it.

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I have heat but no dash defrost or floor heat


it could be a bad switch... it could also be leaking vacum lines (vacum is what operates the dirictional doors). it could be a stuck door, or bad hinge. it could also be loose ducts underneath the dash.

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I recently purchased a 1999 Chevy Blazer 4WD LT with the 4WD AUTO 4 switch push button. We picked it up cheap. We now know why... 4WD dash switch is dead, changed it with a used one lights flash and n


Sounds like the encoder switch is bad ..it on the transfer case .it has a motor with wires going to it.when you press the button it sends a signal to that motor to switch into a certain gear..

Apr 21, 2012 | Cars & Trucks

1 Answer

Stuck in 4 LO


Check your transmission fluid level. More than likely it's either low, but since you didn't switch it to 4 low, it's probably a vacuum leak. Remember it should be in neutral to switch back to 2 wheel drive.

Dec 06, 2011 | 2008 Toyota Tundra

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2000 blazer stuck between auto 4 wheel and 4 lo. wont go back into 2 wheel or shift into 4 hi. just goes between auto 4wheel and 4lo


check for vacum leakes. check the 4wd actuator located under th battery box. I uses vacum to pull in and out of 4wd

Nov 05, 2011 | 2000 Chevrolet Blazer

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1999 blazer heat on the floor dont work just blows out the defrost. heat works good just cant get it to blow on the floor. is this a problem in the swich or vacume


Most likely the vacuum. The (door) that switches the heat from floor, dash, defrost, isn't switching. The door could be stuck and even though it maybe trying switch, it can't from being stuck or in a bind.

Jan 03, 2010 | 1999 Chevrolet Blazer

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2001 Dodge Durango stuck in 4 wheel-Low. Won't switch back to 2WD


Just to clarify, the "transmission" is not stuck in 4-Lo. It is the "transfer case" that is attached to the transmission that actually engages the 4-Hi and 4-Lo modes. To properly shift your vehicle into 4-Lo, you know that you have to shift the transmission into neutral and slow down to less than 5 mph. Once your vehicle slows down to this range, your can switch your transfer case into 4-Lo mode. Due to the inner workings of the transfer case, the actual shift into 4-Lo may take a few seconds to complete. This is normal and does not signify that there is an issue. All transfer cases that have 4-Lo mode will act this way regardless of the make or model. To make a long story short, to shift out of 4-Lo you must follow the same steps that you took to shift into 4-Lo, just in reverse order. Switch the transfer case to 4-Lo mode if it isn't already there. Slow down to less than 5 mph (your vehicle must be moving, though). Then, shift your car into 4-Hi or 2WD. Give your vehicle several seconds to complete the shift. The transfer case indicator light will flash until it is complete. When it does complete the shift into the new gear mode, you will most likely hear a "clunk" (the range sleeve inside the transfer case disengages from its mating spline) from under your car. Again, any transfer case with 4-Lo (regardless of make or model) will exhibit this same noise. This should help you get out of 4-Lo. It is good practice to shift your car into and out of 4-Lo at least a few times each year to keep all of the splines free of corrosion and build-up. Based on the age of your vehicle, your transfer case may also need a complete flush and some new transmission fluid. Hope this helps.

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1 Answer

My SUV is stuck in the 4X4L mode.


In order to get it to shift in or out of 4 lo the transmission must be in neutral with your foot on the brake and moving less than 5 mph. If it still does't change try tapping the shift motor with a block of wood, it could be stuck

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