2004 Chevy Avalanche 4 wheel drive

2004 CHEVROLET AVALANCHE
52,112 MILES • V8 • 4WD • AUTOMATIC
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GOTTWIN
  • MEMBER
  • 2 POSTS
i had a problem recently during a snow storm i selected 4 H on the 4 wheels drive selector.It started blinking and said service 4 wheel drive system needs service on the message center.
it would not go into 4 wheel drive

I used a scan tool an no error codes were present.
i tried to select 4h with scaner connected and again no codes were present

im able to put the truck into 4 low.
any ideas.i dont go into 4 wheel drive much.maybe 6 times a year.of course this year we have 3 big snow storms and the 4 high fails.
Jan 14, 2010 at 8:35 PM
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SCOTTY DEE
  • CERTIFIED EXPERT
  • 592 POSTS
You will need a scan tool that can retrive information from all modules, primarily the transfer case module. Transfer case position sensors and encoders are common culprits.
Jan 26, 2010 at 12:10 PM