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Front end not locking in 4X4 2002 2500HD Chevrolet Silverado

Tiny
AKWOODY
  • MEMBER
  • 2002 CHEVROLET SILVERADO
  • 150,000 MILES
Transfer case(263HD GM) is shifting, rear differential is working. Front end isn't engaging. It popped in & out several times before it finally quit entirely. How/what manual test can I use to troubleshoot the electrical shift system & Isolate the problem. I replaced the Actuator(?) Switch/component. Not it
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Sunday, March 18th, 2012 AT 5:51 AM

8 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Scan the PCM/TCM for code/s-possibilities here could be the transfer case shift control module, transfer encoder motor and the transfer case encoder-also see transfer case diagnostic system check below
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Sunday, March 18th, 2012 AT 8:09 AM
Tiny
AKWOODY
  • MEMBER
  • 4 POSTS
Ok, I have a Code Buddy CAN OBDII Code Reader 901ES (I know it's cheap). When plugged inthe tool doesn't comunicate w/ the CAT, HCM, EVAP, 2AIR or theA/C. Why? This Vehicle has been involved in an odometer rollback scam so I know the computer has been tampered with. However I don't know if the lack of comunication is due to the tampering or my cheap code reader. The Vehicle has been into 2 dealerships since I've owned it & neither one caught the odometer tampering. It VIN# will help it is 1GCHK29U02E231162
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Sunday, March 18th, 2012 AT 8:43 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
If its unable to communicate your scantool might not be compatible. I recommend you bring it back to the dealer I don't think I can be helpful, I'm sorry
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Sunday, March 18th, 2012 AT 9:15 PM
Tiny
AKWOODY
  • MEMBER
  • 4 POSTS
Thank you for your input & time. On way to use a better reader now at auto parts store. This site has/is very helpful
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Sunday, March 18th, 2012 AT 9:46 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
I'm sorry again and TY for using 2carpros
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Sunday, March 18th, 2012 AT 10:21 PM
Tiny
AKWOODY
  • MEMBER
  • 4 POSTS
C0226 ABS Left front speed sensor missing. Would this cause problem. O'Reilley's/Shucks Auto parts store has a fee of $10 to access some parts of their loaner Code Reader. Does anyone know what it accesses for the 10 bucks? My Vehicle has to cycle before I can go any further lol.
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Sunday, March 18th, 2012 AT 11:04 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Dunno if its related but the ABS light should be On if there's a failure on the ABS-if missing it has to be replaced
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Sunday, March 18th, 2012 AT 11:14 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
$10.00 bucks to probably acess the ABS module I assumed
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Sunday, March 18th, 2012 AT 11:41 PM

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