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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1779 (DATA COMMUNICATION SYSTEM)SCHEMATIC AND ROUTING DIAGRAMSDATA COMMUNICATION SCHEMATIC ICONS
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Data Communication Schematic Icons

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Data Communication Schematic Icons
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Data Communication Schematic Icons

Icon Icon Definition
GM19386Courtesy of GENERAL MOTORS CORP.
CAUTION: When performing service on or near the SIR components or the SIR wiring, the SIR system must be disabled. Refer to SIR DISABLING AND ENABLING . Failure to observe the correct procedure could cause deployment of the SIR components, personal injury, or unnecessary SIR system repairs.
GM296880Courtesy of GENERAL MOTORS CORP.
IMPORTANT: Twisted-pair wires provide an effective shield that helps protect sensitive electronic components from electrical interference.
In order to prevent electrical interference from degrading the performance of the connected components, you must maintain the proper specification when making any repairs to the twisted-pair wires shown :
  • The wires must be twisted a minimum of 9 turns per 31 cm (12 in) as measured anywhere along the length of the wires.
  • The outside diameter of the twisted wires must not exceed 6.0 mm (0.25 in).
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.