Hi Jerry, I'm glad to help you out. I don't have access to the exact information for the replacement interval of the PCV (positive crankcase ventilation) in your vehicle. The general information is that you need to replace the PCV valve between 35,000 -60,000 miles. We suggest that you reach out to your local dealership for the exact figure. Take advantage of the sale price and limited stocks for this item. Click this link to order this part: https://www.carparts.com/pcv-valve/standard/siv546?can=CPAP3648 I hope this helps. Happy shopping.

Hi Curtis, I'm pleased to assist you. Our website actually shows three different ones. Choose the component based on how it appears in your car. Click the link below to choose among the options we have available. Place your order at a reduced cost while supplies last. I hope this is helpful. Enjoy your CP shopping experience! https://www.carparts.com/search?q=pcv_valve&vehicle[model]=CTS&vehicle[make]=Cadillac&vehicle[year]=2004&can=CPGG4850_CSQA_20230816

Hi Janet, thank you for reaching out. Yes, this is. You can use this link to continue ordering the part at a discounted price today: https://www.carparts.com/pcv-valve/standard/siv546?can=CPAP3648_CSQA_20230207 I hope this helps. Enjoy shopping.

Hi Reginald, No. The PCV (Positive Crankcase Ventilation) holds the motor oil and is located at the bottom of your engine. When fuel is burned in your engine, it produces waste gases that are mostly vented out through your exhaust system. The PCV valve is a one-way valve attached to the crankcase. If you've discovered a rear main seal leak in your vehicle, seal the leak before it's too late. Here is an article that would help you solve the problem; https://gobdp.com/blog/bad-rear-main-seal-leak/#:~:text=If%20you've%20discovered%20a,as%20your%20drive%20your%20vehicle.