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 MANUALSCHEVROLET1999EXPRESS 1/2 TON VAN V6-4.3L VIN WREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESSCAN TOOL DATA, NORMAL VALUES AND DEFINITIONSSCAN TOOL DATA LIST - POWERTRAIN SYSTEM
1999 Chevrolet Express 1/2 Ton Van V6-4.3L VIN W
Scan Tool Data List - Powertrain System
1999 Chevrolet Express 1/2 Ton Van V6-4.3L VIN WSECTION Scan Tool Data List - Powertrain System
Scan Tool Data Display (Part 1 Of 3):
Scan Tool Data Display (Part 2 Of 3):
Scan Tool Data Display (Part 3 Of 3):
Use the scan tool data listed in this table for comparison after performing the On-Board Diagnostic system check and finding the on-board diagnostics function properly with no diagnostic codes displayed. Not all parameters will apply to each vehicle. Use only the parameters which apply to your particular vehicle.
The Typical Scan Tool Data Values are an average of display values recorded from normally operating vehicles. The Typical Scan Tool Data Values represent the values a normally functioning system will display. The values you get may vary due to a low battery charge or other reasons, but they should be very similar to the typical values provided in the following list.
Do not use a scan tool that displays erroneous data. Report the problem to the manufacturer. The use of a faulty scan tool can result in misdiagnosis and unnecessary parts replacement.
Use only the parameters listed in the tables for diagnosis.
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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.