Question about Chevrolet Silverado 2500

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Will two wheel drive still work if my transfer case is shot? i will be buying a '90 3/4 ton silverado and need to know if i am looking at a project or not.

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Yes

Posted on Sep 13, 2010

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Error message repair 4wd


I guess you probably don't know what transfer case you have ?
SERVICE 4WD
Refer to
?€¢
Transfer Case Description and Operation in Transfer Case - NVG 149-NP3


?€¢
Transfer Case Description and Operation in Transfer Case - NVG 246-NP8


?€¢
Transfer Case Description and Operation in Transfer Case - NVG 261-NP2


?€¢
Transfer Case Description and Operation in Transfer Case - NVG 263-NP1


The NVG 246 EAU provides 5 modes, Auto 4WD, 4HI, 4LO, 2HI and Neutral.
The four manual mode, or range gear positions, of the NVG 261 transfer case are:
?€¢
2HI - 2 wheel drive high range


?€¢
4HI - 4 wheel drive high range, part-time


?€¢
4LO - 4 wheel drive low range, 2.72:1 gear ratio reduction


?€¢
N - Neutral, 4 wheel


The NVG 263 transfer case provides the driver with 4 manual mode/gear positions:
?€¢
2HI - 2 Wheel Drive high range


?€¢
4HI - 4 Wheel Drive high range


?€¢
4LO - 4 Wheel Drive low range


?€¢
Neutral


With the info I've given you ,you should be able too now !
There is probably a code stored somewhere !
DTC B0790 DTC B2725 DTC C0300 DTC C0305 DTC C0306 DTC C0321 DTC C0327 DTC C0359 DTC C0374 DTC C0379 DTC C0550.

Jan 31, 2015 | 2004 Chevrolet Silverado 2500

1 Answer

1991 chevy 3/4 ton 4 wheel drive doesn't work


You might have to change the switch on the transfer case or check to see if you have a broken wire or fuse blowen hope this helps

May 29, 2014 | 1999 Chevrolet Silverado 1500

1 Answer

I am having trouble getting my 99 Silverado z71 into 2 wheel drive and 4 high. The truck started slipping out of 2 wheel and will only drive in 4 low currently. Filling the transfer case only helped...


sounds like the transfer case needs rebuilding or replaced check to see if the oil in the case is dark or colored or milkey looking this is a indication the transfer case need to be redone

May 27, 2014 | Cars & Trucks

1 Answer

Service 4wd light appears on message box and the push buttons won't work. how can i find the problem in a cheap way? I don't really have money to blow on replacement parts. It's a 99'...


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.

Oct 19, 2011 | 1999 Chevrolet Silverado 1500

2 Answers

1999 chevy silverado service 4 wheel drive light


I had a similar problem with the Service 4 Wheel Drive light which came on intermittently then became more consistent in the message center display. It would go into 4 wheel drive if the message center did not display the Service 4 Wheel Drive message in the message center, but not when the message was displayed. I found the transfer case switch module in the dash was defective, and it has been working with no other problems for three years.

Jul 16, 2010 | 1999 Chevrolet Silverado 1500

1 Answer

My 2001 silverado w/69,000 miles has no light indicating 2 or 4 h


THE TRANSFER CASE MOTOR IS NOT WORKING TO INGAGE 4 WHEEL DRIVE. CHECK WITH DOOR OPEN WHEN YOU PUSH 4 WHEEL SWITCH YOU SHOULD HEAR MOTOR INGAGE 4 WHEEL DRIVE. IF YOU HEAR MOTOR BUT STILL NO 4 WHEEL DRIVE THE GEAR ON MOTOR COULD BE DAMAGED. REPLACE TRANSFER CASE MOTOR.

Jan 08, 2010 | 2001 Chevrolet Silverado 1500

1 Answer

99 Silverado 4-wheel drive not engaging


It does not seem that sufficient diagnosis was done. No, you cant give a specific diagnosis like that without tearing unit down. It's likely that they told you the most common failure and left it at that. Likely there is a problem with your unit...I think this becomes more of a trust issue than a mechanical one. A second opinion from an independent reputable shop may help but either way, you need to have it fixed. In not using it much, it makes me wonder how it got worn.
good luck

Mar 19, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

I need to locate the 4 wheel drive control module on a 2002 Chevy Silverado. can you tell me where to look


  1. Remove the IP trim bezel.
  2. Pull out the lamp switch, 4WD shift buttons, cargo lamp and air deflector louver assembly in order to disconnect the electrical connectors.
  3. Disconnect all the electrical connectors from the lamp switch, cargo lamp and 4WD shift buttons assembly.
  4. Remove the lamp switch, 4WD shift buttons, cargo lamp and air deflector louver assembly from the vehicle
  5. Remove the electrical harness retainer from the IP support beam.
  6. Disconnect the 2 electrical connectors from the transfer case shift control module.
  7. Move the electrical harness to the left side in order to make room to turn the transfer case shift control module.
  8. Rotate the transfer case shift control module about 45 degrees counter clockwise while pulling out at the same time until the module is approximately 90 degrees from the original position.
  9. Pull out the module from the vehicle

Jan 02, 2009 | 2002 Chevrolet Silverado

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