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 DATA, NORMAL VALUES AND DEFINITIONSSCAN TOOL DATA DEFINITIONS - POWERTRAIN SYSTEMSWEAK VACUUM TEST
1999 Chevrolet Express 1/2 Ton Van V6-4.3L VIN W
Weak Vacuum Test
1999 Chevrolet Express 1/2 Ton Van V6-4.3L VIN WSECTION Weak Vacuum Test
(Pass/Not Run/Fail)
The Weak Vacuum Test will run only if the Loaded Canister Test does not pass. Insufficient vacuum in the evaporative system will cause this test to fail. The two states of this parameter are Pass and Not Run/Fail.
The Weak Vacuum Test will run only if the Loaded Canister Test does not pass. Insufficient vacuum in the evaporative system will cause this test to fail. The two states of this parameter are Pass and Not Run/Fail.
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.