Express 1/2 Ton Van V6-4.3L VIN W (1999)
23. Reinstall the pump reservoir cap.
EXCESSIVE VACUUM DROP DIAGNOSIS
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Tools Required
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J 35555 Mity Vac
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J 43485 Power Steering Bleed Adapter
1. If the vacuum drops, remove the pressure and return hose from the pump.
2. Install the plugs (1) (2) supplied with J 43485 into the pressure and return port.
3. Attach J 43485 to J 35555 or equivalent.
4. Place J 43485 on or in the pump reservoir filler neck.
5. Apply a vacuum of 68 kPa (20 in Hg) maximum.
6. If the vacuum drops again, repair or replace the pump. If the vacuum holds steady, continue to check the other parts of the steering system.
