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 MANUALSCHEVROLET2005MONTE CARLO V6-3.8L VIN KREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSBODY CONTROL MODULEDESCRIPTION AND OPERATIONDATA LINK COMMUNICATIONS
2005 Chevrolet Monte Carlo V6-3.8L VIN K
Data Link Communications
2005 Chevrolet Monte Carlo V6-3.8L VIN KSECTION Data Link Communications
DATA LINK COMMUNICATIONS DESCRIPTION AND OPERATION
DATA LINK CONNECTOR (DLC)
The data link connector (DLC) is a standardized 16-way connector located below the instrument panel and close to the steering column. Both the connector design and location are dictated by industry wide agreement to follow SAE J1962 standards.
All DLCs are required to provide a power supply, hot at all times, to Pin 16. This circuit is used to power the scan tool. All DLCs provide a power ground at Pin 4 and a clean signal ground at Pin 5.
The class 2 serial data communications circuit is provided at Pin 2 of the DLC.
CLASS 2 SERIAL DATA LINK
The class 2 serial data link allows the following modules to communicate and share data with each other:
- Auxiliary power drop connector
- Body control module (BCM)
- Digital radio receiver (U2K or U2L)
- Driver information center (DIC)
- Electronic brake control module (EBCM)
- Instrument panel cluster (IPC)
- OnStar module (UE1)
- Powertrain control module (PCM)
- Radio
- Inflatable restraint sensing and diagnostic module (SDM)
The class 2 serial data link allows a scan tool to communicate with the above modules for diagnostic and testing purposes.
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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.