Chart F - DERM Cannot Communicate Through Serial Data Line: Notes
WARNING: This page is about a different car, the 1994 GMC Safari and 1994 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
To avoid air bag deployment and injury when trouble shooting system, only use test equipment specified in diagnostic charts. Under no circumstances should battery powered test equipment or test light be used. Carefully follow all instructions.