GM Service Manual Online
For 1990-2009 cars only

DTC

Description

Type

Illuminate MIL

B2419

DTC B2419 Twilight Photocell Circuit Problem in Body Control System

IPM

No

B2420

DTC B2420 Twilight Delay Pot Failure in Body Control System

IPM

No

B2422

DTC B2422 Interior Lamp Rheostat Failure in Body Control System

IPM

No