Chevrolet Silverado / GMC Sierra. Service manual — part 667

DTC Descriptor

DTC B1001 00

SDM Option Configuration Error

Circuit/System Description

The inflatable restraint sensing and diagnostic module (SDM) stores a primary data key, which is
a 4-digit number, and a secondary data key, which is a portion of the vehicle identification
number (VIN). When the ignition is turned ON, the SDM compares this information to the
information stored in the body control module (BCM) over the serial data communication circuit.
If there is a mismatch between the information stored in the SDM and BCM, DTC B1001 will
set.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

The 4-digit primary data key stored in the SDM does not match the 4 digits stored in the
BCM.

The VIN stored in the BCM does not match that of the vehicle.

Action Taken When the DTC Sets

The SDM commands the AIR BAG indicator ON.

The SDM disables all deployments.

Conditions for Clearing the DTC

The last 4-digit Primary Data Key in the SDM match the last 4 digits stored in the BCM.

The VIN that is stored in the SDM matches the VIN stored in the BCM.

Diagnostic Aids

This DTC is an indication that an incorrect SDM is installed in the vehicle, or that the SDM
and/or the BCM was replaced without reprogramming the BCM with the new information.

Reference Information

Schematic Reference

2008 Chevrolet Silverado 1500

2008 RESTRAINTS Supplemental Inflatable Restraints - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

SIR Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

SIR System Description and Operation

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections

Wiring Repairs

SIR/SRS Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information.

Circuit/System Testing

1. Ignition ON, verify the scan tool Secondary Key Status displays Valid.

If not the specified value, verify the scan tool Received VIN Digits 2-7 match the
vehicle VIN, if the VIN does not match, reprogram the BCM. If the VIN matches,
reprogram the SDM.

2. Ignition ON, verify the scan tool Primary Key Status displays Valid.

If not the specified value, verify the scan tool SDM Primary Key matches the Received
Primary Key, if the key does not match, perform the Setup SDM Primary Key in BCM
procedure.

IMPORTANT: When removing connectors inspect for damage or corrosion.

Damage or corrosion in the following requires repair or
replacement of the affected.

SDM

SDM wiring harness

2008 Chevrolet Silverado 1500

2008 RESTRAINTS Supplemental Inflatable Restraints - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

3. With a scan tool, verify DTC B1001 is not set as current.

If DTC is set as current, replace the SDM.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for SDM and BCM replacement, setup, and programming

DTC B1011

Diagnostic Instructions

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Review Strategy Based Diagnosis for an overview of the diagnostic approach.

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC B1011 71

System Disabled Information Stored Invalid Serial Data Received

Circuit/System Description

The vehicle rollover sensor (ROS) monitors the vehicle speed signal (VSS) on the GMLAN serial
data circuit. If the VSS is marked as invalid or is missing, the ROS will set a diagnostic trouble
code (DTC).

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

If the VSS is marked as invalid or is missing.

Conditions for Clearing the DTC

The condition for setting the DTC no longer exists.

A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

Diagnostic Aids

2008 Chevrolet Silverado 1500

2008 RESTRAINTS Supplemental Inflatable Restraints - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

DTC B1011 does not indicate a ROS system malfunction and will not cause any warning
indicators to illuminate. Factors such as a long engine crank or a delay in serial data
communications will cause B1011 to set.

Reference Information

Electrical Information Reference

Circuit Testing

Testing for Intermittent Conditions and Poor Connections

Connector Repairs

Wiring Repairs

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

SIR/SRS Wiring Repairs

DTC B1019

Diagnostic Instructions

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Review Strategy Based Diagnosis for an overview of the diagnostic approach.

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC B1019 00

SDM System Configuration Error

DTC B1019 3A

SDM System Configuration Error Incorrect Component Installed

Circuit/System Description

The passenger air bag ON/OFF indicators are used to notify the driver when the Passenger
Presence System (PPS) has enabled or disabled the I/P inflator module. When the ignition is
turned ON, the ignition voltage is supplied to the passenger air bag ON/OFF indicators and to the

2008 Chevrolet Silverado 1500

2008 RESTRAINTS Supplemental Inflatable Restraints - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado