GMC TSB #PIE-0225-B
2012 GMC Sierra
Affected Component: POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE)
- Summary
- CHEVROLET/GMC: THE 4WD FAILS TO ENGAGE WHEN SERVICE 4WD INDICATOR ILLUMINATES AND TRANSFER CASE CONTROL MODULE (TCCM) REPORTS POSSIBLE C0379 SET. MODELS 2012-2013 AVALANCHE, SILVERADO, SUBURBAN, TAHOE, SIERRA, YUKON, YUKON XL. *PE