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HOMESERVICE MANUALSCHEVROLET1998SUBURBAN K2500, 7.4 J, PART TIMEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 584 (DATA LINK COMMUNICATIONS SYSTEM)DESCRIPTION AND OPERATIONDATA LINK COMMUNICATIONS DESCRIPTION AND OPERATIONCLASS 2 SERIAL DATA LINE
1998 Chevrolet Suburban K2500, 7.4 J, Part Time

Class 2 Serial Data Line

1998 Chevrolet Suburban K2500, 7.4 J, Part TimeSECTION Class 2 Serial Data Line
WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.

The class 2 serial data line on this vehicle is a ring/star configuration. The following modules communicate on the class 2 serial data line:

  • The body control module (BCM)
  • The driver information center (DIC)
  • The electronic brake control module (EBCM)
  • The inflatable restraint sensing and diagnostic module (SDM)
  • The instrument panel cluster (IPC)
  • The memory seat module-driver
  • The powertrain control module (PCM)
  • The radio
  • The transfer case shift control module

RENDER: 1.0x

NO RELATED

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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.