Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 152 (COMPUTER/INTEGRATING SYSTEMS)DIAGNOSTIC INFORMATION AND PROCEDURESDATA LINK REFERENCES

2006 Chevrolet Cobalt SS, 4D Sedan, Standard

Data Link References

2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Data Link References

WARNING: This page is about a different car, the 2005 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

This table identifies which serial data link that a particular module uses for in-vehicle data transmission and communication with the scan tool. Some modules may use more than one data link to communicate. Some modules may use different circuits for functional and diagnostic communication. Use the schematic reference link in the table for additional information. This table is used to assist in correcting a communication malfunction. For the description and operation of these serial data communication circuits refer to Data Link Communications Description and Operation .

Control Module	Data Link Type	Diagnostic Procedure
Schematic Reference: Data Link Connector (DLC) Schematics (A/T) or Data Link Connector (DLC) Schematics (M/T)
Body Control Module (BCM)	Class 2 CAN	Scan Tool Does Not Communicate with Class 2 Device
Communication Interface Module (OnStar)	Class 2	Scan Tool Does Not Communicate with Class 2 Device
Digital Radio Receiver	Low Speed GMLAN	Scan Tool Does Not Communicate with Low Speed GMLAN Device
Electronic Brake Control Module (EBCM)	Keyword Data Line CAN	Scan Tool Does Not Communicate with Keyword Data Line
Engine Control Module (ECM), with L61	Keyword Data Line CAN	Scan Tool Does Not Communicate with Keyword Data Line
Inflatable Restraint Sensing and Diagnostic Module (SDM)	Class 2	Scan Tool Does Not Communicate with Class 2 Device
Instrument Panel Cluster (IPC)	Class 2	Scan Tool Does Not Communicate with Class 2 Device
Power Steering Control Module (PSCM)	Class 2	Scan Tool Does Not Communicate with Class 2 Device
Powertrain Control Module (PCM), with L66	Keyword Data Line CAN	Scan Tool Does Not Communicate with Keyword Data Line
Radio	Low Speed GMLAN	Scan Tool Does Not Communicate with Low Speed GMLAN Device
Transmission Control Module (TCM), with L61	Keyword Data Line CAN	Scan Tool Does Not Communicate with Keyword Data Line

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.