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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1999EXPRESS 1/2 TON VAN V6-4.3L VIN WREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESSCAN TOOL DIAGNOSTICSTHE DIAGNOSTIC EXECUTIVEON BOARD DIAGNOSTIC TESTS
1999 Chevrolet Express 1/2 Ton Van V6-4.3L VIN W
On Board Diagnostic Tests
1999 Chevrolet Express 1/2 Ton Van V6-4.3L VIN WSECTION On Board Diagnostic Tests
A diagnostic test is a series of steps which has a beginning and an end. The result of which is a pass or fail reported to the Diagnostic Executive. When a diagnostic test reports a pass result, the Diagnostic Executive records the following data:
^ The diagnostic test has completed since the last ignition cycle
^ The diagnostic test has passed during the current ignition cycle
^ The fault identified by the diagnostic test is not currently active
When a diagnostic test reports a fail result, the Diagnostic Executive records the following data:
^ The diagnostic test has completed since the last ignition
^ The fault identified by the diagnostic test is currently active
^ The fault has been active during this ignition cycle
^ The operating conditions at the time of the failure
^ The diagnostic test has completed since the last ignition cycle
^ The diagnostic test has passed during the current ignition cycle
^ The fault identified by the diagnostic test is not currently active
When a diagnostic test reports a fail result, the Diagnostic Executive records the following data:
^ The diagnostic test has completed since the last ignition
^ The fault identified by the diagnostic test is currently active
^ The fault has been active during this ignition cycle
^ The operating conditions at the time of the failure
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.