Basic Knowledge Required

1999 Chevrolet Astro Van 2WD V6-4.3L VIN WSECTION Basic Knowledge Required
In order to effectively use this service information, a general understanding of basic electrical circuits and circuit testing tools is required. The technician must be familiar with circuit diagrams and the meaning of terms such as voltage, ohms, amps, and the basic theories of electricity. The technician must understand what happens in an open circuit and a shorted circuit.

A complete listing of the tools needed to diagnose and repair the system is located in Special Tools and Equipment.
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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.