2004 Chevy Tahoe 4WD Actuator

Tiny
RCB837
  • MEMBER
  • 2004 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 55,000 MILES
I recently took my vehicle to the dealership because my "service 4wd" light came on. Sometimes it was on and sometimes it was off. When the light was on the 4wd would not work but other times it would work fine. But sometimes I would get in the car and the car would be in 4wd low. They told me that my actuator was bad. Therefore to save some money I got the part number and changed it myself. The very next morning I got in the car and the light came back on. The light is again going off and on and when it is on the 4wd will not work. The actuator was very simple to change so I new that it could not be that easy to replace and fix. Is there anything else that I can do before I back to the dealership to try and get it fixed?
Monday, June 9th, 2008 AT 12:57 PM

9 Replies

Tiny
RHALL77
  • MECHANIC
  • 3,361 POSTS
Do you know what trouble code they got out of the module
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Monday, June 9th, 2008 AT 3:05 PM
Tiny
RCB837
  • MEMBER
  • 5 POSTS
I did not get the actual code that was wrong. They only told me the part number that I needed after I complained and made them give it to me. Manwhile I have found someone with a code reader that I was going to try and get to help me tomorrow, so therefore I may be able to get it. Will that help? Thanks.
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Monday, June 9th, 2008 AT 8:09 PM
Tiny
RHALL77
  • MECHANIC
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Yes that will help. Let me know
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Tuesday, June 10th, 2008 AT 7:07 AM
Tiny
RCB837
  • MEMBER
  • 5 POSTS
I think the error code is CO327
That could be a 0 or a O, I am not sure.
The part number that I was told to get is 88962314.
I did hook up a computer this morning to the car and cleared a error code but it came back within 300feet of driving. This is after I replaced the above part also.
Thanks.
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Tuesday, June 10th, 2008 AT 1:38 PM
Tiny
RHALL77
  • MECHANIC
  • 3,361 POSTS
Do you know if you have a NR4 or a NP8 transfer case
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Wednesday, June 11th, 2008 AT 7:45 AM
Tiny
RCB837
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  • 5 POSTS
No, I do not know which I have. But after reading for the past few days and going through old bills I have discovered that my original error code was C0327. This is an encoder circuit malfunction which means I need a encoder motor. I have read though that instead of replacing the whole motor (est $500) that I just replace the sensor in that motor (est. $100) part number 88962315. The problem was that they gave me part number 88962314 which is the 4wd actuator in the front (which I already replaced for $120). This part number should have gone with error code C0379, not C0327. I am going to start looking and pricing for a encoder motor sensor (#88962315). Does this sound right and am I heading in the right direction?
So if I get just a encoder motor sensor is it easy to replace or should just replace the whole encoder motor while I have it apart? Or am I even heading in the right direction?

Also, I did change the fluid yesterday just to be sure too.
Thanks for the continued help.
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Wednesday, June 11th, 2008 AT 9:04 AM
Tiny
RHALL77
  • MECHANIC
  • 3,361 POSTS
Just do the sensor
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Wednesday, June 11th, 2008 AT 9:47 AM
Tiny
RCB837
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Thanks. I really appreciate the help and knowing that I am atleast heading in the right direction. Thanks again!
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Wednesday, June 11th, 2008 AT 2:49 PM
Tiny
SLUDOG
  • MEMBER
  • 2 POSTS
Last year you had issues with your 4wd either switching into low or auto or whatever everytime you started it or no light being on at all.

Im having the same problem. I was wondering what ended up fixing it.
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Monday, June 29th, 2009 AT 3:24 PM

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