PIT5125F
Service Bulletin Details
Public Details for: PIT5125F
This preliminary information communication provides information to the technician about vehicles proper operation of the stop and/or turn signals. For vehicles without regular production option code v4d circuit 618 is for the left stop and
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Bulletin No.: PIT5125F Published date: 05/26/2021 Preliminary Information PIT5125F Available Stop and Turn Lamp Options/Diagnostic Information Models Brand: Model: Model Years: VIN: from to Engine: Transmissions: Chevrolet Express Cutaway Van 2009 - 2021 All All All All GMC Savana Cutaway Van 2009 - 2021 All All All All Supersession Statement This PI was superseded to update model year. Please discard PIT5125E. The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI. Condition / Concern There has been some confusion regarding the proper operation of the stop and/or turn signals. This could lead to difficultly diagnosing a stop and/or turn signal concern. There are two different ways the BCM can be calibrated for stop and turn signal operation: 1. Without RPO V4D- The stop and turn signals are one lamp (same bulb). Traditionally, there will be one red stop/turn signal lamp per side. 2. With RPO V4D- The stop and turn signals are separate lamps (two different bulbs). Traditionally, there will be one red stop lamp and one amber turn signal per side. Note: RPO V4D is included with (YF2) Ambulance Package, (B3D) School Bus Package or (ANC) Shuttle Bus Package. Recommendations / Instructions 1. Without RPO V4D: See Example Doc ID 2635855, Circuit 618 Yellow (X405 terminal D) is for the left stop and turn signal. Circuit 619 Dk Green (X405 terminal E) is for the right stop and turn signal. 2. With RPO V4D: See Example Doc ID 2635855, Circuit 618 Yellow (X405 terminal D) is for the left turn signal only. Circuit 619 Dk Green (X405 terminal E) is for the right turn signal only. See example doc id 2635856, circuit 1320 light blue (X405 terminal C) is for the stop lamps only. NOTE: If the vehicle is up fitted and the body does not support the way the BCM is calibrated for the stop/turn signal setup, contact Techline Customer Support Center for a new BCM calibration to either remove or add the "V4D" option. Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. © 2021 General Motors. All Rights Reserved.