Service Adaptive Headlamp Message, Lin Bus DTC U1523 Setting After Right Headlamp Replaced – 2013-2014 Cadillac XTS

2014 Cadillac XTS

NHTSA ID Number: 10201273 Manufacturer Communication Number: PIC6435B Summary This Preliminary information communicates that U1523 may set after right headlamp replacement due to a part issue. Engineering is looking into the concern.   Condition Service Adaptive Headlamp message with DTC U1523 setting after right headlamp replacement.   Cause Part Issue   Correction: A parts issue previously caused … Read more

LIN Bus Diagnostic Information – 2014-2023 Buick Cadillac Chevrolet GMC

Chevrolet Buick GMC Cadillac

NHTSA ID Number: 10224304 Manufacturer Communication Number: PIT5698C Summary This Preliminary information communicates additional information on how a LIN bus operates and diagnostic tips when working on a LIN bus.   Condition As more smart motors, switches, and sensors are being used there are more Local Interconnect Network (LIN) buses on vehicles. Because of this, some questions … Read more