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 MANUALSCHEVROLET2012SILVERADO 2500 4WD V8-6.6L DSL TURBOREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESSERIAL DATA GATEWAY MODULE SCAN TOOL INFORMATION
2012 Chevrolet Silverado 2500 4WD V8-6.6L DSL Turbo
Serial Data Gateway Module Scan Tool Information
2012 Chevrolet Silverado 2500 4WD V8-6.6L DSL TurboSECTION Serial Data Gateway Module Scan Tool Information
Serial Data Gateway Module Scan Tool Information
The Serial Data Gateway Module (SDGM) Scan Tool Data List contains all module parameters that are available on the scan tool. The list is arranged in alphabetical order. A given parameter may appear in any one of the data lists, and in some cases may appear more than once, or in more than one data list in order to group certain related parameters together.
Use the scan tool data values under the following conditions:
* The Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle is complete.
* The On-Board Diagnostics are functioning properly.
* There are no diagnostic trouble codes (DTCs) present.
Important: Do not use a scan tool that displays faulty data. Report the condition to the scan tool manufacturer. The use of a faulty scan tool can result in misdiagnosis and the unnecessary replacement of parts.
Only the parameters listed below are referenced in this manual for diagnosis. If a scan tool displays other parameters, those values are not recommended by General Motors for use in diagnosis.
The scan tool values from a properly running vehicle may be used for comparison with the vehicle you are diagnosing. The values below represent a typical display recorded from a properly functioning system.
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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.