Question about 2005 Chevrolet Silverado 1500HD

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Service 4wd I get a service 4wd, comes and goes ,sometimes the sw. lights dont work. also it went into 4wlow by itself twice this stoped went to chevy got code c0327 they said it needed a encoder motor and sw cluster. that was 5 months ago yesterday I put it into 4wd hi it went in then I got service 4wd message again . Switch lights went out its back into 2wd not and sw lights on again . Could this only be the sw or the sensor?

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  • mayer2323 Nov 24, 2008

    I never had the encoder motor or sensor or sw replaced I took in when the message appeared but I refused service to check out the problem myself.

  • mayer2323 Dec 10, 2008

    The other day when I started the truck the netural light on the sw was blinking but the truck was in 2 wheel drive also the service 4wd light came on. I drove like this for about 1/4 mile then stoped and put the trans in park as I did that the 2 wheel light came on the sw and the service 4wd light went out whats the matter?

  • tedworthy Apr 06, 2009

    2001 chevy silverado 6l 1500hd I have the same problem the service 4wd light comes on then it goes out. Today we had some snow,I shifted {pushed button} and now it feels like the transfer case is starting to feel tight and will NOT come out of 4wd or go into 2wd or 4 low. I have purchased 2nd hand a new to me controller motor for $250 Canadian but havent had time to install it yet do you think this will resolve the problem???



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My 4WD shifts on it's own, and back out when i turn the engine on and off. I thinks it's a sensor but not sure.

Posted on Feb 23, 2010

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If you had the switch and encoder motor replaced 5 months ago, then you have warranty. You need to return to the dealer and have them pull codes to see if it is the C0327 again. Some of these trucks also had grounding issues for the 4wd module. If it is the same c0327 code stay on them and make them confirm their original diagnosis.

Posted on Nov 23, 2008

  • gmtechman Nov 26, 2008

    Sorry, did not read close enough. DTC C0327 relates improper feedback voltage from the encoder switch in the shift motor. You do not have to replace the entire shift motor. GM started offering the encoder switch by itself because they got tired of buying $400 encoder (shift) motors under warranty. Don't know what the bulletin number is but I'm pretty sure there is a TSB for this concern.



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