What is the purpose of the Positive Crankcase Ventilation (PCV) system and PCV Valve for Cadillac DeVille and DTS?

A PCV (Positive Crankcase Ventilation) system helps to reduce hydrocarbon emissions by passing fresh air through the crankcase, which picks up blow-by gases and then pulls them via the PCV valve into the throttle body or intake manifold where they are burned by the engine. The PCV system comprises of two hoses and a PCV valve that controls the flow of gases in relation to engine speed and manifold vacuum. On some newer models, an upper intake manifold is located over a "dirty air" tube that carries blow-by gases from the crankcase, through the PCV valve and into the throttle body. One hose brings in cool ambient air from outside through an air intake duct while another takes crankcase gases out of crankcase, through the PCV valve and into a throttle body. The PCSV system can be inspected for proper operation easily. Keep checking your PCV system, as carbon black and gunk deposited by blow-by gases will eventually clog up the "dirty" side system hose and inside of throttle body behind throttle plate as well as its valve. Common symptoms for a blocked or stuck PCV (positive crankcase ventilation) valve include rough idle, stalling or slow idle speed, oil leaks, oil in air cleaner or sludge in engine. Valves for Positive Crank Case Ventilation.

Genuine Cadillac Deville PCV Valve

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8 PCV Valves found

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Cadillac Deville Valve Asm,Pcv
Part Number: 19303069
$3.60 MSRP: $6.54
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Product Specifications
- Other Name: VALVE, Engine Crankcase; PCV Valve
- Replaces: 06487532, 6487532
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-2001 Cadillac Deville | 4 DOOR, DEVILLE, HIGH LUXURY, SLS, STS, TOURING 4 DOOR | 8 Cyl 4.6L
- 1982-1989 Cadillac Deville | 2 DOOR, 4 DOOR, 60 SPECIAL 4 DOOR, BROUGHAM 2 DOOR, BROUGHAM 2 DOOR FWD, BROUGHAM 4 DOOR, BROUGHAM 4 DOOR FWD, CONVERSION, FORMAL LIMOUSINE, FUNERAL COACH, LIMOUSINE, LIMOUSINE 4 DOOR, LIMOUSINE 4 DOOR CTR PART | 8 Cyl 4.1L, 8 Cyl 4.5L
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Cadillac Deville Valve,Pcv
Part Number: 6487779
$9.83 MSRP: $17.64
You Save: $7.81 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: VALVE, Engine Crankcase; PCV Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1990-1995 Cadillac Deville | 2 DOOR, 4 DOOR, 60 SPECIAL 4 DOOR, CONVERSION, TOURING 4 DOOR | 8 Cyl 4.5L, 8 Cyl 4.9L
- 1982-1986 Cadillac Deville | 2 DOOR, 4 DOOR, BROUGHAM 2 DOOR, BROUGHAM 2 DOOR FWD, BROUGHAM 4 DOOR, BROUGHAM 4 DOOR FWD, FORMAL LIMOUSINE, FUNERAL COACH, LIMOUSINE, LIMOUSINE 4 DOOR, LIMOUSINE 4 DOOR CTR PART | 8 Cyl 4.1L
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Cadillac Deville Valve,Crankcase Vent
Part Number: 6487534
$12.60
ADD TO CART
Product Specifications
- Other Name: VALVE, Engine Crankcase; PCV Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1982 Cadillac Deville | 2 DOOR, 4 DOOR, BROUGHAM 2 DOOR, BROUGHAM 4 DOOR | 6 Cyl 4.1L
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Cadillac Deville Breather Assembly, Air Cleaner & Silencer
Part Number: 6484966
$3.62 MSRP: $6.50
You Save: $2.88 (45%)
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Product Specifications
- Other Name: BREATHER, Air Cleaner Intake; Breather, Breather Element
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1982 Cadillac Deville | 2 DOOR, 4 DOOR, BROUGHAM 2 DOOR, BROUGHAM 4 DOOR | 6 Cyl 4.1L
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Cadillac Deville Valve,Crankcase Vent
Part Number: 25040622
$12.60
ADD TO CART
Product Specifications
- Other Name: VALVE, Engine Crankcase; PCV Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1984 Cadillac Deville | 2 DOOR, 4 DOOR, BROUGHAM 2 DOOR, BROUGHAM 4 DOOR, FORMAL LIMOUSINE, LIMOUSINE
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Cadillac Deville Valve,Crankcase Vent
Part Number: 25043526
Product Specifications
- Other Name: REGULATOR, Engine Crankcase
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985 Cadillac Deville | 2 DOOR, 4 DOOR, BROUGHAM 2 DOOR FWD, BROUGHAM 4 DOOR FWD, FUNERAL COACH, LIMOUSINE 4 DOOR, LIMOUSINE 4 DOOR CTR PART | 6 Cyl 4.3L Diesel
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Cadillac Deville Valve,Crankcase Vent
Part Number: 25041551
Product Specifications
- Other Name: REGULATOR, Engine Crankcase
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985 Cadillac Deville | 2 DOOR, 4 DOOR, BROUGHAM 2 DOOR FWD, BROUGHAM 4 DOOR FWD, FUNERAL COACH, LIMOUSINE 4 DOOR, LIMOUSINE 4 DOOR CTR PART | 6 Cyl 4.3L Diesel
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Cadillac Deville Valve,Crankcase Vent
Part Number: 25041678
Product Specifications
- Other Name: VALVE, Engine Crankcase; PCV Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1982-1984 Cadillac Deville | 2 DOOR, 4 DOOR, BROUGHAM 2 DOOR, BROUGHAM 4 DOOR, FORMAL LIMOUSINE, LIMOUSINE | 8 Cyl 5.7L Diesel

Cadillac Deville PCV Valve Parts Questions & Experts Answers

Valve Asm,Pcv
19303069
Q: What is the purpose of the Positive Crankcase Ventilation (PCV) system and PCV Valve for Cadillac DeVille and DTS?
A: A PCV (Positive Crankcase Ventilation) system helps to reduce hydrocarbon emissions by passing fresh air through the crankcase, which picks up blow-by gases and then pulls them via the PCV valve into the throttle body or intake manifold where they are burned by the engine. The PCV system comprises of two hoses and a PCV valve that controls the flow of gases in relation to engine speed and manifold vacuum. On some newer models, an upper intake manifold is located over a "dirty air" tube that carries blow-by gases from the crankcase, through the PCV valve and into the throttle body. One hose brings in cool ambient air from outside through an air intake duct while another takes crankcase gases out of crankcase, through the PCV valve and into a throttle body. The PCSV system can be inspected for proper operation easily. Keep checking your PCV system, as carbon black and gunk deposited by blow-by gases will eventually clog up the "dirty" side system hose and inside of throttle body behind throttle plate as well as its valve. Common symptoms for a blocked or stuck PCV (positive crankcase ventilation) valve include rough idle, stalling or slow idle speed, oil leaks, oil in air cleaner or sludge in engine. Valves for Positive Crank Case Ventilation.