I need a service manual for free of a new process 246 cm transfer case for a 1999 chevy tahoe

eplaced electronic 4 wheel with all new parts ? what parts ? before replacing parts did you have it diagnosed ? What scan ? Do you have a professional grade scan tool . A code reader will only show OBD2 codes . And which does yours have ? Transfer Case - NVG 243-NP1 (Two Speed Selectable)
Transfer Case - NVG 246-NP8 (Two Speed Automatic)

Vehicle Speed Sensor (VSS) - Allison
On the left side of the transmission
Automatic Transmission Electronic Component Views in Automatic Transmission - Allison
Automatic Transmission Inline Harness Connector End View in Automatic Transmission - Allison
Vehicle Speed Sensor (VSS) - 4L60-E
On the left side of the transmission
Automatic Transmission Electronic Component Views in Automatic Transmission - 4L60-E
Automatic Transmission Related Connector End Views in Automatic Transmission - 4L60-E
Vehicle Speed Sensor (VSS) - 4L80-E
On the left side of the transmission
Automatic Transmission Electronic Component Views in Automatic Transmission - 4L80-E
Automatic Transmission Related Connector End Views in Automatic Transmission - 4L80-E
Vehicle Speed Sensor (VSS) - Transfer Case
On the top left side of the transfer case
Transfer Case Control Component Views in Transfer Case - NVG 246 - NP8 (Two Speed Automatic)
Transfer Case Control Connector End Views in Transfer Case - NVG 246 - NP8 (Two Speed Automatic)
Vehicle Speed Sensor (VSS) Adapter (4WD Only) - 4.8L,5.3L,6.0L
On the left side of the transmission
Engine Controls Component Views in Engine Controls - 4.8L,5.3L,6.0L
Engine Controls Connector End Views in Engine Controls - 4.8L,5.3L,6.0L
Vehicle Speed Sensor (VSS) Adapter (4WD Only) - 8.1L
On the left side of the transmission

Chevrolet Suburban Questions - 4 wheel drive does not ...

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CarGurus4 wheel drive does not work - When I put the Sub in 4 wheel drive, low of high, ...Asked by Robert_Holland_073 Dec 17, 2009 at 04:06 AM about the 1994 Chevrolet Suburban K1500 4WD ... it can seize up and then the trans case may ingage but the hubs won't be locked in so it ... 1999 Chevrolet Suburban K2500 LT 4WD.

Chevrolet Tahoe Suburban 4 Wheel Drive Indicator Lights - Car ...

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Oct 2, 2007 - 31 posts - ‎19 authors
My 1999 Tahoe (odo reading 137,400 miles) won't go into 4 wheel drive. .... I have a 98 suburban 1500 4x4 LT 5.7 L with 165,000 miles ... I recall once forgetting todisengage 4WD and I could feel a terrific binding when I ...
Step by Step Troubleshooting 4wd 4x4 88-98 Chevy GMC ...? 21:32https://www.youtube.com/watch?v=Su9Dkrfd_ZgJan 20, 2014 - Uploaded by rwdellingStep by Step Troubleshooting 4wd 4x4 88-98 Chevy GMC Truck. rwdelling .... Mine is acting like it is NOT pulling with the fronts,won't engage. ... Have you ever adjusted or the shift cable on your 1500 Chevy ... GM 246 transfer case, 2000 Chev Suburban- Duration: 20:09. by spelunkerd 286,045 views.GM Troubleshooting Part 13 - 4WD vacuum actuator & cable ...? 5:11https://www.youtube.com/watch?v=CbEF6PyJdU0Feb 3, 2011 - Uploaded by mr diyguy123I tacked on this video about the 4wd sys. ... I have a 1994 ChevyS10 ... My S10 won't let you go to 4 LO when your in gear. ... the front end to keep them disengaged. when you put it in 4wd, the vacuum actuator pushes a gear ...

no,if 1 is an np3 the other an np8 they go on different trannys 99 00 01 02 Chevy Silverado Sierra Avalanche Tahoe Yukon Transfer Case NP8...

Transfer Case Rear Housing Repair Kit for 4WD GM Pickup SUV NP2 NP8 NEW

for comparison only

Transfer Case
NVG 236 and 246 Auto-Trak II Fluid Gm P/N 12378508 NVG 261 and 263 Manual Transmission Fluid GM P/N 88861800

THis information from TS Bulletin...

Subject: "Service 4WD" Indicator Illuminated, DTC B2725 Set (Replace Transfer Case Shift Control Switch)
Models: 1999-2002 Chevrolet and GMC C/K Pickup and Utility Models (Silverado, Sierra, Avalanche, Suburban, Tahoe, Yukon, Yukon XL)
with Four Wheel Drive and NVG 236/246 Transfer Case (RPO NP8)

Condition: Some customers may comment on the Service 4WD indicator illuminating. Upon investigation, the technician may find DTC B2725 set.

Cause: The condition may be due to a intermittent fault in the transfer case shift control switch.

Correction:
Important: The transfer case shift control module should not need replacement. DO NOT replace P/N 15749703 unless diagnosis points to the module as the malfunction.

Replace the transfer case shift control switch using published Service Information procedures.

Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer. Thank you for using Fixya, and have a nice day.

Pulling code's from the 4X4 control module would point to a diagnostic procedure . Do you own a professional type scan tool that can read DTC'S - diagnostic trouble code's in the 4X4 control module ? Autozone , advance etc.... can not read these code's .
Which transfercase does it have ?
Transfer Case - BW 4482-NR4
Transfer Case - NVG 246-NP8

How many buttons for 4X4 three or four ?
The BW 4482 transfer case features a 3-button shift control switch located on the instrument panel
The NVG 246 EAU transfer case features a 4 button shift control switch located on the instrument panel
When the ignition key is in the RUN position, the transfer case shift control module monitors the transfer case shift control switch to determine if the driver desires a new mode/range position. At a single press of the transfer case shift control switch, the lamp of the new desired position will begin flashing to inform the driver that the transfer case shift control module has received the request for a new mode/range position. The lamp will continue to flash until all shifting criteria has been met and the new mode/range position has been reached, or has been engaged. Once the new mode/range position is fully active, the switch indicator lamp for the new position will remain ON constantly.The 4X4 system with four button shift control can set a number of DTC'S
DTC B0790
DTC B2725
DTC C0300
DTC C0305
DTC C0306
DTC C0321
DTC C0327
DTC C0359
DTC C0374
DTC C0379
DTC C0550
The three button switch can also set an store a few codes
DTC B0790
DTC B2725
DTC C0306
DTC C0327
DTC C0329
DTC C0359
DTC C0550
Without knowing if any of these DTC'S are stored can't suggest any type of repair .

Which one of these 4X4's does your vehicle have ?
Transfer Case - NVG 246-NP8 (Two Speed Automatic)
Transfer Case - NVG 261-NP2 (Two Speed Manual)

sound like problems in transfer case shift module.