Where is the PCV valve located and how do you check and replace it on GMC Sierra?

The PCV valve is located in the left valve cover. Pull the valve (with hose attached) from the rubber grommet in the cover while engine idle normal operating temperature. Put your finger over the valve opening. Check for a plugged hose, manifold port, or the valve itself if there's no vacuum at the valve. Replace any plugged or deteriorated hoses. Turn off the engine and shake it to check for rattling sounds from PCV valve. Replace it with a new one if it does not rattle. To replace pull out the one end of hose and note its seated position. When purchasing a replacement PCV valve, make sure it's for your particular vehicle and engine size. Compare the old valve with the new one to make sure they're the same. Push until seated into hole in end of hose . Inspect grommet for damage and hardening; replace as needed. Push securely into place pcv valve and line.

Genuine GMC Sierra PCV Valve

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11 PCV Valves found

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GMC Sierra Valve Assembly, Crankcase Depression Regulator
Part Number: 12650860
$94.73 MSRP: $191.56
You Save: $96.83 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: VALVE, Engine Crankcase
- Replaces: 12643247
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2012-2016 GMC Sierra | 1 TON CREW CAB, 2500 CREW CAB STANDARD BOX, 2500 REGULAR CAB, 2500 REGULAR CAB STANDARD BOX, 3500 CREW CAB LONG BOX, 3500 CREW CAB ONLY, 3500 CREW CAB STANDARD BOX, 3500 DOUBLE CAB LONG BOX, 3500 REGULAR CAB, CREW CAB 1 TON, CREW CAB 1 TON 119.0, CREW CAB 1 TON 137.0, CREW CAB 2500 LONG BOX, CREW CAB 6'6" BOX 3/4 TON, CREW CAB 8' BOX 3/4 TON, DOUBLE CAB 2500 LONG BOX, DOUBLE CAB 2500 STANDARD BOX, EXTENDED CAB 1 TON, EXTENDED CAB 6'6" BOX 3/4 TON, EXTENDED CAB 8' BOX 3/4 TON, EXTENDED CAB CHASSIS 1 TON 161.5, EXTENDED CREW CAB 1 TON 161.5, REGULAR CAB 1 TON, REGULAR CAB 3/4 TON, REGULAR CAB CHASSIS 1 TON 137.0, REGULAR CAB CHASSIS 1 TON 161.5 | 8 Cyl 6.6L Diesel
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GMC Sierra PCV Valve Assembly
Part Number: 19303069
$3.73 MSRP: $7.04
You Save: $3.31 (48%)
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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:
- 2005-2007 GMC Sierra | 3500 CHASSIS REGULAR CAB 137.0, CLASSIC 3500 CHASSIS REGULAR CAB 137.0
- 1999-2002 GMC Sierra | 1500 EXTENDED CAB LONG BOX, 1500 EXTENDED CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX | 6 Cyl 4.3L
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GMC Sierra PCV Valve Assembly
Part Number: 12691880
$8.32 MSRP: $16.98
You Save: $8.66 (51%)
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Product Specifications
- Other Name: Valve Assembly, Pcv; PCV Valve
- Replaces: 12631624
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2019 GMC Sierra | 1500 CREW CAB, 1500 CREW CAB STANDARD BOX, 1500 DOUBLE CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX, CREW CAB 1/2 TON | 8 Cyl 5.3L, 8 Cyl 6.2L
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GMC Sierra PCV Valve Assembly
Part Number: 12691877
$9.14 MSRP: $17.24
You Save: $8.10 (47%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Valve Assembly, Pcv; PCV Valve
- Replaces: 12630887
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2021 GMC Sierra | 1500 CREW CAB, 1500 CREW CAB STANDARD BOX, 1500 DOUBLE CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX, CREW CAB 1/2 TON, CREW CAB 5'8" 1/2 TON, CREW CAB 5'8" BOX 1/2 TON, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 6 Cyl 4.3L
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GMC Sierra VALVE ASM-PCV
Part Number: 12721582
$11.45 MSRP: $21.60
You Save: $10.15 (47%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: PCV Valve
- Replaces: 12705103, 12664437, 12694767
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2019-2024 GMC Sierra | CREW CAB 5'8" 1/2 TON, CREW CAB 5'8" BOX 1/2 TON, Crew Cab 6'6" Box 1/2 Ton, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 4 Cyl 2.7L
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GMC Sierra Valve,Crankcase Vent Breather
Part Number: 97222874
$12.27 MSRP: $19.30
You Save: $7.03 (37%)
Product Specifications
- Other Name: VALVE, Engine Crankcase
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2005 GMC Sierra | 2500 CREW CAB LONG BOX, 2500 CREW CAB STANDARD BOX, 2500 EXTENDED CAB LONG BOX, 2500 EXTENDED CAB STANDARD BOX, 2500 REGULAR CAB, 3500 CHASSIS EXTENDED CAB 161.5, 3500 CHASSIS REGULAR CAB 137.0, 3500 CHASSIS REGULAR CAB 161.5, 3500 CREW CAB, 3500 EXTENDED CAB, 3500 REGULAR CAB | 8 Cyl 6.6L Diesel
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GMC Sierra Fitting,Pcv
Part Number: 12572717
Product Specifications
- Other Name: VALVE, Engine Crankcase; PCV Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2003 GMC Sierra | 1500 CREW CAB LONG BOX, 1500 EXTENDED CAB LONG BOX, 1500 EXTENDED CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX, 2500 CREW CAB LONG BOX, 2500 CREW CAB STANDARD BOX, 2500 EXTENDED CAB LONG BOX, 2500 EXTENDED CAB STANDARD BOX, 2500 REGULAR CAB, 3500 CREW CAB, 3500 EXTENDED CAB, 3500 REGULAR CAB | 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L
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GMC Sierra PCV Valve
Part Number: 25179136
Product Specifications
- Other Name: VALVE, Engine Crankcase; PCV Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2002 GMC Sierra | 1500 CREW CAB LONG BOX, 1500 EXTENDED CAB LONG BOX, 1500 EXTENDED CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX, 2500 CREW CAB LONG BOX, 2500 CREW CAB STANDARD BOX, 2500 EXTENDED CAB LONG BOX, 2500 EXTENDED CAB STANDARD BOX, 2500 REGULAR CAB, 3500 CHASSIS EXTENDED CAB 161.5, 3500 CHASSIS EXTENDED CAB 185.5, 3500 CHASSIS REGULAR CAB 161.5, 3500 CREW CAB, 3500 EXTENDED CAB, 3500 REGULAR CAB | 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L
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GMC Sierra PCV Valve
Part Number: 97302067
Product Specifications
- Other Name: VALVE, Engine Crankcase; PCV Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2004 GMC Sierra | 2500 CREW CAB LONG BOX, 2500 CREW CAB STANDARD BOX, 2500 EXTENDED CAB LONG BOX, 2500 EXTENDED CAB STANDARD BOX, 2500 REGULAR CAB, 3500 CREW CAB, 3500 EXTENDED CAB, 3500 REGULAR CAB | 8 Cyl 6.6L Diesel
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GMC Sierra Valve Assembly, Crankcase Depression Regulator
Part Number: 12642205
$26.63 MSRP: $47.76
You Save: $21.13 (45%)
Product Specifications
- Other Name: VALVE, Engine Crankcase
- Replaces: 12633286
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2011 GMC Sierra | 1 TON CREW CAB, CREW CAB 1 TON, CREW CAB 1 TON 119.0, CREW CAB 1 TON 137.0, CREW CAB 6'6" BOX 3/4 TON, CREW CAB 8' BOX 3/4 TON, EXTENDED CAB 1 TON, EXTENDED CAB 6'6" BOX 3/4 TON, EXTENDED CAB 8' BOX 3/4 TON, EXTENDED CAB CHASSIS 1 TON 161.5, EXTENDED CREW CAB 1 TON 161.5, REGULAR CAB 1 TON, REGULAR CAB 3/4 TON, REGULAR CAB CHASSIS 1 TON 137.0, REGULAR CAB CHASSIS 1 TON 161.5 | 8 Cyl 6.6L Diesel
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GMC Sierra PCV Valve Assembly
Part Number: 12646872
Product Specifications
- Other Name: VALVE, Engine Crankcase; PCV Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2023-2024 GMC Sierra | 8 Cyl 6.2L

GMC Sierra PCV Valve

The PCV Valve of GMC Sierra returns fumes from the crankcase to the intake, improving efficiency and reducing pollution. The mechanism functions via manifold vacuum, which restricts flow when the engine idles. It allows wider opening throttle, which ensures partially burned gases are redirected to be reburned instead of letting sludge and pressure build inside the block. This simple spring-loaded check and flame arrester device is incorporated into the crankcase to prevent backfires traveling up the intake. For decades of GMC production, their design has remained the same, a small metal or plastic PCV Valve which sits opposite the breather to draw vapors. The engines of early Sierra and late Sierra are therefore fundamentally the same over which there are no confusing style changes, apart from some size updates for varying intake manifolds. Only periodic inspection of the PCV Valve is required. However, a sticky unit may cause rough idle, oil leaks, and higher tailpipe emissions. Replacing the Sierra lightweight part merely restores vacuum balance, improves piston ring sealing, and can even free up a bit of horsepower. The PCV Valve presents one of the most beneficial yet frequently neglected systems under the hood of every GMC, as it shuttles hazardous blow-by back to the chambers for both engine health and environmental aims. A clean PCV Valve is required for a consistent manifold function.

Each OEM GMC Sierra PCV Valve we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.

GMC Sierra PCV Valve Parts Questions & Experts Answers

Valve Assembly, Crankcase Depression Regulator
12650860
Q: Where is the PCV valve located and how do you check and replace it on GMC Sierra?
A:
The PCV valve is located in the left valve cover. Pull the valve (with hose attached) from the rubber grommet in the cover while engine idle normal operating temperature. Put your finger over the valve opening. Check for a plugged hose, manifold port, or the valve itself if there's no vacuum at the valve. Replace any plugged or deteriorated hoses. Turn off the engine and shake it to check for rattling sounds from PCV valve. Replace it with a new one if it does not rattle. To replace pull out the one end of hose and note its seated position. When purchasing a replacement PCV valve, make sure it's for your particular vehicle and engine size. Compare the old valve with the new one to make sure they're the same. Push until seated into hole in end of hose . Inspect grommet for damage and hardening; replace as needed. Push securely into place pcv valve and line.