How to Change the PCV Valve in Pontiac Cars

by Contributing WriterUpdated June 12, 2017

Over the years, GM made a number of Pontiac car vehicles, including the Firebird, Bonneville, Sunfire and GTO. Modern Pontiac car cars have PCV valves. The PCV (positive crankcase ventiliation) valve helps to regulate the engine's fuel fumes. It's a vital part of the emission-control system, designed to minimize pollution and improve efficiency. Changing the PCV valve is quick and simple no matter what Pontiac car vehicle you have.

Under The Hood:

 How to Change the PCV Valve in a Pontiac

Familiarize yourself with the PCV valve. The PCV valve is a small, L-shaped tube about three inches long. If you aren't certain what the valve looks like, consider looking at a picture of the valve prior to attempting to locate it in your Pontiac's engine compartment.

Shut off the Pontiac's engine and open the hood. If your Pontiac has a plastic engine cover, lift it up to remove it.

Locate the PCV valve. You'll find the PCV valve mounted on the intake manifold. On front-wheel drive Pontiac vehicles, this will be directly to the left of the valve cover (on the passenger side of the compartment). On rear-wheel drive Pontiac vehicles, this will be directly behind the valve cover in the back half of the engine compartment.

Unplug the vacuum hose from the PCV valve's port. No tools are needed. Simply pull it off to disconnect it.

Grasp the Pontiac's PCV valve and firmly pull it upward to remove it. Push the new PCV valve down into the port and plug the vacuum hose into it.

Items you will need

  • Replacement PCV valve

 How to Replace the PCV Valve in a Pontiac Grand Prix

Locate the PCV valve in your Pontiac Grand Prix. The PCV valve in the Grand Prix 3.8L engine is mounted in the rear section of the intake manifold. You'll find the valve attached to a hose.

Remove the PCV valve in order to check if it needs replacement. To remove, you pull the valve out of the grommet. Also remove the hose attached to it.

Shake the PCV valve. To test functionality, you're going to listen for a rattling sound inside of the valve. If you don't hear the rattle, then you need to replace the Grand Prix's PCV valve.

Purchase the OEM PCV valve replacement for your Grand Prix. You can order a PCV valve for Grand Prix models manufactured between 1988 and 2005 through

Push the new valve into the grommet that held the old PCV valve. Once it snaps into place, you can attach the hose. Restart your car to see if this solved the problem of your engine running rough.

 How to Replace the PCV Valve in a Pontiac Bonneville

Locate the PCV valve on your Pontiac Bonneville. You'll find it in the back of the intake manifold. You'll need to remove the valve cover in order to access the part.

Troubleshoot your PCV valve in order to determine the need for replacement. To do this, place a finger over the end to see if vacuum is present. You're also going to look for plugged hoses during your check.

Purchase a replacement PCV valve for your Bonneville. You can find the standard version for 1992 to 2003 models from Advanced Auto Parts. Make the purchase from their online or retail stores.

Pull the valve away from the intake manifold in order to remove. You'll have to first spin the cover counterclockwise to access the PCV valve. Remove the hose and then discard the PCV valve.

Push the new PCV valve into the intake of the Pontiac Bonneville. The larger end goes into the grommet while the shorter end is reattached to the hose. Replace the cover and you have finished installation.

 How to Replace a PCV Valve in a 2005 Sunfire

Loosen the nut around the negative (-) battery cable, then pull the cable away from the terminal.

Locate the PCV valve on the center-left part of the engine bay, towards the firewall and windshield.

Use a pair of pliers to loosen the locking nut from the PCV valve. Once it is loose, continue unscrewing it with your hand until it is out.

Slide the locking nut off and detach the PCV valve from the hose. The PCV valve is easily removed by pulling it out.

Insert the new PCV valve into the hose. Make sure it is secure. Slide the locking nut back into position, then insert the PCV valve and nut back into the intake side of the engine.

Tighten the nut with your hand, then turn it once with the pliers. Reconnect the negative battery cable.

Items you will need

  • Pliers

 How to Replace the PCV Valve in a Pontiac Grand Am

Locate the PCV valve on your Grand Am. You'll find the PCV valve on the right side of the front valve cover. You'll need to remove the valve in order to troubleshoot it to determine if you need a replacement. To remove, pull the PCV valve out of the cover and detach the hose.

Test the old PCV valve to determine if it needs replacing. Blow air through it in order to see if it is clogged. If it does not seem to ventilate, then you'll need to install a new valve.

Buy a new PCV valve for your Grand Am. You can buy an original equipment replacement from Car Stuff for all Pontiac Grand Am engine types made between 1994 and 2005.

Pop the new PCV valve into the spot of the old valve. With the correct part, it should snap right in. Take the hose and reattach it in order to complete the installation.

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