K 3500 Truck 4WD V8-6.6L DSL Turbo VIN 1 (2001)
Four Wheel Drive Selector Switch: Customer Interest
Transfer Case Switch - `Service 4WD' Indicator ON
File In Section: 04 - Driveline Axle
Bulletin No.: 02-04-21-004
Date: April, 2002
TECHNICAL
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.
Parts Information
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use the table shown.
DISCLAIMER
