Ive rePlaced the dash switch but the light only stay on for a split second
On the 1999 silverado the transfer case has an actuator motor to engage from high to low range ,for 4wd there is an actuator motor on the front axle, had same problem in my 98 changed and works perfect
SOURCE: service 4wd light appears on message box and the
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.
Testimonial: "well I ordered the switch and hope to have it in a few days. I will let you know if your advice was helpful or not. either way, thanx. At least it's a start."
SOURCE: some dash lights do not work
if the headlight switch were bad....all of the instrument panel lights would be out, same with the fuse. More than likely you have some individual bulbs out, to change them requires disassembly of the dash. If you are not comfortable with that disassembly, I would recommend that you consult a shop. If you are comfortable with it, I'd say grab a Haynes book and go for it!
SOURCE: 1999 Chevy Silverado 4x4, transfercase will not kick out of 4x4
sounds like the punch solinoid in the front diff
SOURCE: ignition switch 2001 chevrolet impala
YOU NEED A HAYNES REPAIR MANUAL WITH PHOTOS TO SHOW YOU HOW TO REMOVE STEERING WHEEL AND DISABLE AIRBAGS.YOUR IGNITION SWITCH IS IN THE STEERING COLUMN.
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