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When I put it in auto 4wheel drive truck will go.

Tiny
DPCORNWELL
  • MEMBER
  • 1999 CHEVROLET SILVERADO
  • 52,000 MILES
When I put it in auto 4wheel drive truck will go about 50ft. Stop working, service 4wh drive lite comes on and .I cant get it out of auto 4wh until I shut off motor, now I don, tuse it, now when I plow in 4wh high it works good until go over 25 mph in high range service 4wh drive lite comes on and I can, t get it out of 4wh until I stop an shut mtr off ! Please help
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Tuesday, January 22nd, 2013 AT 7:18 PM

4 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Have it scanned for codes, souns like the encoder motor either isn't working one way or the t-case module may be bad. But it needs scanning to see what the problem is.
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Tuesday, January 22nd, 2013 AT 11:23 PM
Tiny
DPCORNWELL
  • MEMBER
  • 3 POSTS
Had it scanned 6mo. Ago an nothing showed up also other mec. Look at it with no clue
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Wednesday, January 23rd, 2013 AT 1:12 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Scannig it 6 mo ago doesnt' mean it will be good forever, it needs to be scanned or check to see if encoder motor is getting power and operating. Iit probably isn't working correctly
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Wednesday, January 23rd, 2013 AT 3:06 PM
Tiny
DPCORNWELL
  • MEMBER
  • 3 POSTS
Nothing showed up when scanned 6 mo. Ago the 4wh drive problem was allready there b4 an after
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Wednesday, January 23rd, 2013 AT 7:23 PM

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