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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 721 (DATA LINK COMMUNICATION SYSTEM)SCHEMATIC AND ROUTING DIAGRAMSDATA LINK COMMUNICATIONS SCHEMATIC ICONS
1999 GMC Forward Control 5.7 R, Automatic

Data Link Communications Schematic Icons

1999 GMC Forward Control 5.7 R, AutomaticSECTION Data Link Communications Schematic Icons
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
Data Link Communications Schematic Icons

Icon Icon Definition
GM19386Courtesy of GENERAL MOTORS CORP.
CAUTION: This vehicle is equipped with a Supplemental Inflatable Restraint (SIR) System. Failure to follow the correct procedure could cause the following conditions:
  • Air bag deployment
  • Personal injury
  • Unnecessary SIR system repairs

In order to avoid the above conditions, observe the following guidelines:
  • Refer to SIR Component Views in order to determine if you are performing service on or near the SIR components or the SIR wiring.
  • If you are performing service on or near the SIR components or the SIR wiring, disable the SIR system. Refer to Disabling the SIR System in SIR.
RENDER: 1.0x

NO RELATED

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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.