GM Service Manual Online
For 1990-2009 cars only

Description

Module

DTC 41 Last Message Received Valid

Body Control Module (BCM)

DTC 42 Last Message Received Invalid

Body Control Module (BCM)

DTC 43 Last Message Received with Sumcheck Error

Body Control Module (BCM)

DTC 44 Last Message Received with Encryption Error

Body Control Module (BCM)

DTC 45 Receiver Processing in 20 Second Lockout

Body Control Module (BCM)