Question about 1999 GMC Jimmy

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Transfer case control module

Where is the transfer case control module located in a 1999 jimmy.I was told there was a panel on the passenger side where this is but I do not have a panel. There are some plug ins behind the glove box but I am not sure what this part looks like.Any help would be appreciated.Thank you

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  • t-ravis152 Sep 02, 2008

    4x4 doesnt work, lights on dash switch blink. When playing with buttons with key on and engine off sometimes hear buzzing noise coming from transfer case shift motor. Replaced motor and still does the same thing. Also the motor is turned so far to the 2wd that you cannot reinstall motor back on case.Also repaced dash switch. Next thing to replace is and I am pretty sure it is behind the radio. THANK YOU

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Its behind the kick panal on the pssengers side.

Posted on Nov 25, 2008

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How can I tell whether the transfer case control module is defective and needs to be replaced?


Need to have it check for DTC'S - diagnostic trouble codes , see if a scan tool will communicate with it , see if it will show data PID'S .
SERVICE indicator (4WD/AWD) Lamp
The SERVICE indicator (4WD/AWD) lamp is an integral part of the cluster and cannot be serviced separately. This lamp is used to inform the driver of the vehicle of malfunctions within the automatic transfer case (ATC) system. The SERVICE indicator (4WD/AWD) lamp is controlled by the transfer case shift control module via CKT 1567.

Is your service indicator lamp lit ?
which of these does your jimmy have
Transfer Case - NVG 233-NP1 (Two Speed Selectable)
Transfer Case - NVG 236 (Two Speed Automatic)

Mar 20, 2016 | 1999 GMC Jimmy

1 Answer

Were is the shift control module for tranmission on a 95 gmc jimmy


Transfer case module is located in the center of the dash under the panel behind lighter and ash tray

Oct 02, 2013 | 1995 GMC Jimmy

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

2 Answers

2000 jimmy cant turn 4 wheel drive on pushed thev button n light keeps on flashing n 4 wheel drive


The simple answer is to replace the TCCM (transfer case control module).
Being both cheap and inquisitive, I wanted to investigate further, and I will provide a more in-depth answer.

This answer pertains to various GM vehicles. These include the Chevy Blazer, GMC Jimmy, S10, S15, Sonoma vehicles from 1999, 2000, 2001, 2002, 2003, 2004, & 2005.
Specifically the 15748800 module for the NP8 option 4 button automatic 4X4 NVG-236/246 transfer case.

I doing research online, I find that 15154323 might be an alternate TCCM, and that GM redesigned the module and now sells the replacement for this module with a 12577412 part number for about $300.

This information refers to the 15748800 module.
2000-jimmy-turn-4-bqqpoqfgk1hfvr1c2liydaq2-3-0.jpg Symptoms. If the vehicle is started and driven in 2 hi, the vehicle operates normally.
If the driver attempts to switch the transfer case into any other mode, the transfer case makes noise as it shifts, the service 4x4 light comes on and the newly selected mode indicator light starts to flash.

2000-jimmy-turn-4-bqqpoqfgk1hfvr1c2liydaq2-3-2.jpg The TCCM is mounted behind the passenger side kick panel cover. It should be removed but left connected. Pin F4 should be monitored with either a lamp or meter. This pin should be high or 12 volts when in 2 wheel drive, and low or ground when in 4 wheel drive.
A quick test of the system is to ground the F4 pin, recycle the ignition, and try shifting the transfer case into and out of 4 wheel drive. ( I used a lamp based test light to be safe. Do not an LED based one.) If the mode indicator light remains steady and the Service 4X4 does not light, proceed with this repair procedure. If this does not resolve the issue, please proceed to troubleshoot the front vacuum system, 4X4 solenoid, 4X4 actuator, front axle, or front axle indicator switch.

If this test appears to resolve the issue, you will need to remove the TCCM module from the vehicle. Bend the 8 tabs away from the back cover. Remove the top cover, unscrew the board from the back cover / plate. turn over the board at a static safe work station, and measure the indicated 10,000 ohm SMD resistor. In this module, the resistor is required to operate near it's limits, and I believe that the conformal coating trapped heat and caused the resistor to fail. You can check other resistors nearby for a relative comparison. If found to be open, the resistor can be replaced with a higher power value 10,000 ohm SMD resistor, or a conventional 10,000 ohm resistor with wired leads.

The TCCM should be checked for corrosion on the connectors and cleaned if nessacary. The module can then be restored to the vehicle, and your 4X4 should work normally.

Please respond if this procedure helps you.

2000-jimmy-turn-4-bqqpoqfgk1hfvr1c2liydaq2-3-5.png Front view / pin side
f16f1 Connector Part Information1205210716 Way F Micro-Pack 100 Series (ORN) Pin Wire Color Circuit No. Function
E1 Tan 1569 Transfer Case Lock Soleniod Output
E2 - - Not Used
E3 PNK 1561 AWD/4WD Indicator Lamp Output
E4 Lt GRN/BLK 1563 2 HI Indicator Lamp Output
E5 BRN/WHT 1555 Transfer Case Position Switch Encoder Signal
E6 RED/WHT 1556 Transfer Case Position Switch Encoder Signal
E7 YEL/BLK 1558 Transfer Case Position Switch Encoder Signal
E8 DK BLU/WHT 1557 Transfer Case Position Switch Encoder Signal
E9 DK GRN/WHT 1133 Class 2 Serial Data Signal
E10 BRN 241 Fuse Output - Ignition 3 - Type III Fuse
E11 PPL 806 Fuse Output - Crank - Type III Fuse
E12 YEL 400 Vehicle Speed Sensor Signal
E13 PPL 401 Vehicle Speed Sensor Return
E14 BLK/WHT 1695 Four Wheel Drive Front Wheel Lock Telltale
E15 - - Not Used
E16 BLK/WHT 451 Engine Control Module Ground
F1 PPL/WHT 1565 4 LO Indicator Lamp Output
F2 TAN/BLK 1566 4 HI Indicator Lamp Output
F3 BRN 1560 Neutral Indicator Lamp Output
F4 GRA/BLK 1570 Front Axle Actuator Output
F5 LT BLU 2221 Vehicle Speed Sensor Signal
F6 DK GRN 2222 Vehicle Speed Sensor Return
F7 GRA/BLK 1694 Four Wheel Drive Switch Signal - Low
F8 - F11 - - Not Used
F12 BLK/WHT 1554 Transfer Case Encoder Signal Return
F13 LT GRN/BLK 431 Reference Voltage Feed - 8 Volt Reference
F14 LT GRN/BLK 431 Reference Voltage Feed - 8 Volt Reference
F15 - - Not Used
F16 LT BLU 1693 Four Wheel Drive Switch Signal
2000-jimmy-turn-4-bqqpoqfgk1hfvr1c2liydaq2-3-9.png Front view / pin side

Connector Part Information120528564 Way F Metri-Pack 280 Series (BLK) Pin Wire Color Circuit No. Function
A BLK 1552 Transfer Case Motor Feed - Clockwise
B RED 1553 Transfer Case Motor Feed - Counterclockwise
C BLK 1050 Ground
D ORG 1640 Fuse Output - Battery - Type III Fuse
2000-jimmy-turn-4-bqqpoqfgk1hfvr1c2liydaq2-3-14.jpg

2000-jimmy-turn-4-bqqpoqfgk1hfvr1c2liydaq2-3-20.jpg

2000-jimmy-turn-4-bqqpoqfgk1hfvr1c2liydaq2-3-27.jpg

Jan 28, 2011 | 2000 GMC Jimmy

2 Answers

'Hokay, so now my lovable '99 Jimmy which was having breathing troubles, is now having 4WD trouble. And I think it's just the switch on the dash board; when the truck starts up, the light in 2HI doesn't...


The transfer case is computer controlled. The only way to give you a definative answer for your question is to scan your Powertrain Control Module for fault codes and perform a system check while monitoring transfer case input/output data to see if the computer is recieving the signal from the selector switch. On most GM vehicles, if there is a malfunction with ANY PART

Jan 09, 2011 | 1999 GMC Jimmy

1 Answer

4x4 not kicking in light just flashes


It could be the switch on the dash (3 or 4 button?) Module located in the passenger's kick panel. Shift motor on the transfer case. Easiest to most difficult/expensive. I hope I've helped. If so please rate my answer and leave a comment. If not, please repost.

Dec 03, 2010 | 1999 GMC Jimmy

3 Answers

Tccm 1999gmc jimmy where is it


The TCCM for a 99 Jimmy is behind the passenger, right side kick panel. This is the panel under and to the outboard right side of the glove box. If sitting in the seat and you swing your right foot to the right, you hit this panel. Good luck!

Jul 13, 2010 | 1999 GMC Jimmy

1 Answer

Motor on transfer case


All you need to do is make sure that it is in 2 wheel drive and unplug and unbolt the old one and put the new one on.I will say that in my experience it is usually the control module that is under the passenger side of the dash.let me know if this is of any help

Jan 10, 2010 | 1998 GMC Jimmy

1 Answer

Problem with 4*4 light


Your problem is the transfer case control module. That is located in the passenger side side panel in front of the door. The cost of a new module is around $550.00 Now I fix my problem with a firm but light tap onto the cover. PLEASE KNOW THAT THIS FIXED MY ISSUE WITCH WAS THE SAME AS YOURS BUT MAY NOT FIX YOUR PROBLEM .

May 01, 2009 | 2000 GMC Jimmy

1 Answer

The switch to engage 4 wheel drive is not working.


No the switch is okay there is a transfer case control module that blinks tose lights when there is a problem. You need to fing a compatible scan tool and get the codes from the transfer case controller to diagnose the fault otherwise it will just stay in 2WD.

Jan 29, 2009 | 1999 GMC Jimmy

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