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Questions and Answers

Pontiac Grand Prix PCV Valve Location

Q. I have a 1999 Pontiac Grand Prix GT with the large V-6. Where do I locate the PCV valve on this engine?

Thank You,
Dale

Pontiac Grand Prix PCV Valve Location

A. It's under the MAP sensor in the upper plenum. You need to remove the MAP sensor by turning it ¼- turn while pushing down. Remove the sensor and the PCV should be under that. Reach in with needle nose pliers to grab it.

Pontiac Grand Prix PCV Valve Location
REMOVAL PROCEDURE:
  1. Remove the injector sight shield from the fuel rail and intake.
  2. Remove the MAP sensor (1).
  3. Use a 16 mm socket to press the access cover (2) down and rotate 1/4 turn counterclockwise.
  4. Remove the access cover.
  5. Remove the PCV valve (3) and the O-ring (4) from the intake manifold.
INSTALLATION PROCEDURE:
  1. Install the crankcase ventilation valve (3); replace the O-ring (4) if necessary.
  2. Install the access cover (2).
  3. Install the MAP sensor (1).
  4. Install the sight shield.

Additional Information provided courtesy of AllDATA and Warranty Direct

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