Question about 1999 Chevrolet Blazer

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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 I push 4 lo just the 4 lo button lights up and seems to be in 4 lo. Why won't the 2 wheel button light up in 2 wheel drive and why do both 4 hi and 4 lo button light up when in 4 hi? The TCCM plug isn't corroded at all. Could it just be the cheap aftermarket dash switch that I installed and should I worry about or just drive it?

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  • Chevrolet Master
  • 14,585 Answers

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.

Posted on Nov 14, 2014

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Posted on Jan 02, 2017

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  • 33 Answers

SOURCE: 1994 chevy s10 blazer 4x4 push button type

small sylinoid on the top of the transfer case needs replaced. easy to do. it has three vacumelines going to it just trun out and replace like a bolt.

Posted on Dec 13, 2008

SOURCE: 1998 Chevy Blazer 4x4, $ wheel drive won't work (both 4hi & 4lo )

Reset the computer by disconnecting the battery. This should solve this. nutetral is for the four lo only to engage.

Mike

Posted on Feb 02, 2009

STEVIE_N_24
  • 147 Answers

SOURCE: Chevy pickup 4-wheel drive won't engage

Replace the push button selector assembly. Common failures. If that isnt the problem then the encoder motor on transfer case has failed. Try switch first.

Posted on Mar 29, 2009

  • 33 Answers

SOURCE: I have a 2003 chevy blazer LS, 2-door 4wd w/

try putting in nuetral and then shift into high gear . if still does not work sounds like the 4x4 acctuator is bad

Posted on Jul 01, 2009

  • 1608 Answers

SOURCE: My 1999 chevy silverado 1500 four wheel drive

You probably have a bad encoder motor.It is located on the side of the transfer case on the drivers side.It is black.The other problem they had with these was the switch but you have already replaced this so your next thing is the encoder motor.Hope this helps.Good luck.

Posted on Dec 28, 2009

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