Question about 2002 GMC Envoy

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Location of tccm on gmc envoy

Transfer case control module location on 2002 gmc envoy

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 2002 GMC envoy SLT 4x4, tccm, switch problem

About 45% of all transmission problems are due to a defective battery, its components and the charging system. Make sure you have the correct battery in the vehicle and inspect all items relating to the charging system and the battery. The vehicle should charge between 13,5 to 14.5 volts. The condition of the belts is part of this inspection. If all of this is A-ok then get a scanner and pull the codes in the PCM.
Remember once light is illuminated for a item that item no longer works. Once you've gotton to this point let me know and I'll walk you threw it. Hopefully its just a weak or incorrect battery or something along those lines. Good luck and keep me posted

Posted on Mar 09, 2010

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ingman3
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SOURCE: Where is the transfer case control module on 98 gmc sierra

It is located under the passenger side kick panel. Remove the plastic kick panel cover to reveal the TCCM.

Posted on Nov 02, 2012

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1 Answer

2002 envoy 4x4 will not shift out if park after replacing the TCCM


Who replaced the TCCM ? Was it programmed ?
Program the transfer case shift control module. Refer to Transfer Case Shift Control Module Reprogramming .

Sep 07, 2017 | Cars & Trucks

1 Answer

What does it mean when the service 4wd light comes on in my 2002 gmc envoy?


It means the transfer case control module has detected an error in the system...it could be the encoder motor, transfer case, dash switch assembly, axle engagement assembly or even the transfer case control module (TCCM) itself..you will have to take it in and have the the TCCM read for codes

Mar 26, 2015 | 2002 GMC Envoy

1 Answer

Is there a way to program a newly installed 4WD module on a 2002 GMC Envoy XL without having the dealer to program the module?


hi most of the time it is not the module. there is a Encoder Motor Position Sensor on the transfer case that burns out. it shifts the transfer case from 2 wheel to 4 wheel

Feb 08, 2013 | Cars & Trucks

1 Answer

When I switch my 2002 envoy into 4wd it does not engage and 4wd service light comes on? How can I fix this problem as it worked fine before


This problem could be the Transfer Case actuator/motor or the spline disconnect assembly at the front differential, or a bad Transfer Case Control Module. The other important maintenance action that needs to happen every 50K miles is the transfer case fluid needs to be changed.
Repair of these item is probably not for a unintiated DIY'r.

Jan 21, 2013 | 2002 GMC Envoy

1 Answer

2002 envoy transfer light bkinks. i keep it in 2wd but seen a red N while it was blinking, i read the manual and it says it will blink when switching gears. i dont switch gears.


The 2002 model year had problems with the TCCM (Transfer Case Control Module) going bad. Find one at a salvage yard, get one from a 2003+ vehicle.

Jan 01, 2013 | 2002 GMC Envoy

1 Answer

Where is the transfer case control module on 98 gmc sierra


It is located under the passenger side kick panel. Remove the plastic kick panel cover to reveal the TCCM.

Nov 02, 2012 | 1998 GMC Sierra

1 Answer

Where is 2002 gmc envoy airbag module located???


There is a module that controls the air bags called the SDM Sensing and Diagnostic Module, but the air bags themselves are called modules. If they are referring to the SDM...

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(1) Lower Console
(2) Inflatable Restraint Sensing and Diagnostic Module (SDM)


Hope this helps (remember to rating this free answer and leave a testimonial comment). Thank you for using Fixya.

Oct 13, 2011 | 2002 GMC Envoy

1 Answer

2002 envoy code co550


you need to replace the tccm and get it programmed.


2-04-21-006E: Inoperative 4WD/AWD Lamps, Inoperative 4WD/AWD System, DTC C0550 Set No Communication with TCCM (Reprogram Transfer Case Control Module) - (Jul 20, 2006)
999999995.gif Subject: Inoperative 4WD/AWD Lamps, Inoperative 4WD/AWD System, DTC C0550 Set, No Communication with TCCM (Reprogram Transfer Case Control Module) Models: 2004 Buick Rainier 2002-2004 Chevrolet TrailBlazer, TrailBlazer EXT 2003-2004 Chevrolet Avalanche, Silverado, Suburban, Tahoe 2002-2004 GMC Envoy, Envoy XL 2003-2004 GMC Sierra, Yukon, Yukon XL 2004 GMC Envoy XUV 2002-2004 Oldsmobile Bravada with Electronic Shift or Active Transfer Case (RPOs NP1, NP4 or NP8)

This bulletin is being revised to add Subject information and change the labor operation. This bulletin cancels and supersedes Bulletin Number 03-04-21-006. Please discard Corporate Bulletin Numbers 02-04-21-006D and 03-04-21-006 (Section 04 -- Driveline/Axle).
ConditionSome customers may comment that the 4WD/AWD indicator lights on the selector switch do not work, or the 4WD/AWD system may be inoperative and/or the service 4WD light is illuminated. The condition is typically intermittent and always occurs at key-up. Upon investigation, the technician may find DTC C0550 set.
CauseThe Transfer Case Control Module (TCCM) has not received the wake-up call during key-up and has remained in the "sleep mode".
When the TCCM is in the "sleep mode", it will not communicate with the class II bus or the Tech 2®.
Correction
  1. Try to communicate with the TCCM. If no communication, go to step 2. If communication is possible, go to step 5.
  2. Remove the underhood (ATCM or TREC) TCCM fuse.
  3. Wait 30 seconds.
  4. Reinstall the fuse. The module should "wake up" and communicate with the Tech 2®.
  5. Check for codes in the TCCM. If a C0550 is found current or in history with or without other codes, replace the module and go to step 6.
  6. Reprogram the TCCM with the latest TIS software using normal SPS procedures.
  7. Verify operation and that no codes are present.
Important: For the 2002 model year, the TCCM must be replaced and reprogrammed.
Warranty Information

Jul 29, 2011 | 2002 GMC Envoy

1 Answer

2002 GMC envoy will not go in 4wd (new switchand new actuator)


Have your Transfer Case Control Module (TCCM) checked out. Take it to a shop that has a Tech II or equivilant diagnostic machine that will be able to communicate with the TCCM and dial down where the actual problem is.

Feb 10, 2011 | 2002 GMC Envoy

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