The GM Genuine Parts 12637666 PCV valve is presented as an OEM-quality replacement, measuring 4.2 x 4.2 x 4.1 inches and weighing 0.16 ounces, designed to regulate crankcase vapors and reduce oil consumption. It fits specific GM models—confirm fitment before purchase—and users report straightforward installation, durable construction, and a 4.6/5 average from 117 reviews. What trade-offs exist for this price and fitment, and is it right for your vehicle?
Key Takeaways
- GM Genuine Parts 12637666 is an OEM-spec PCV valve designed for direct fitment on compatible GM vehicles.
- Dimensions: 4.2 x 4.2 x 4.1 inches with 0.25-inch inlet and 0.25-inch NPT outlet, single-port configuration.
- Users report reliable fit, reduced oil consumption, and average 4.6/5 satisfaction from 117 reviews.
- Installation is plug-and-play when inlet/outlet orientations and hose diameters match OEM specifications.
- Verify OEM part number 12637666, vehicle compatibility, seller return policy, and manufacturer warranty before purchase.
Product Specifications and Fitment Details
Dimensions and connections are straightforward and essential for fitment. The PCV valve measures 4.2 x 4.2 x 4.1 inches and weighs 0.16 ounces.
Dimensions and connections are straightforward and essential for fitment — the PCV valve measures 4.2 x 4.2 x 4.1 inches.
Who is it for? Owners seeking OEM compatibility, GM-recommended replacement.
What connections exist? Inlet 0.25 inch, outlet NPT 0.25 inch, single port.
Practical considerations: confirm inlet/outlet orientations on the vehicle, check hose diameters, and verify OEM part number 12637666 against vehicle service info.
Features, compatibility, and specifications: GM OE manufacturing, fit-form-function alignment, GTINs 00707773941850/30707773941851.
Installation is straightforward with proper matching.
Performance, Durability, and User Feedback
Performance and durability for the GM Genuine Parts 12637666 PCV valve are consistent with OEM expectations: it regulates crankcase vapor flow precisely, resists common wear modes, and maintains function under typical operating conditions.
The reviewer notes measured flow stability, 0.25 inch inlet/outlet, 4.2 x 4.2 x 4.1 in dimensions, and 0.16 oz weight.
How long will it last? Typical service life matches GM OE standards, often years under normal use.
What do users report? 117 reviews average 4.6/5, praising fit, reduced oil consumption, and plug-and-play replacement.
Practical: inspect hoses, torque fittings, replace if sticking.
Warranty, Returns, and Purchasing Considerations
When evaluating warranty, returns, and purchasing considerations for the GM Genuine Parts 12637666 PCV valve, buyers should weigh the seller’s return policy, the manufacturer’s warranty options, and practical fitment details such as the 0.25-inch inlet/outlet and the 4.2 x 4.2 x 4.1-inch package size.
Buyers may ask: Is a voluntary 30-day Amazon return enough?
Answer: it covers initial fit and defects, but request the manufacturer’s warranty for longer protection.
Practical checks: confirm 0.25-inch NPT outlet, 1 port, 0.16 oz weight.
Consider price tracking, feedback for lower prices, and OEM compatibility before purchasing.
Frequently Asked Questions
Can This PCV Valve Be Installed Without Special Tools?
Yes. The installer can replace the valve using basic hand tools and minimal effort. They embrace self-reliance, freeing themselves from shop dependence, while ensuring correct fitment and sealing per GM OE specs for reliable operation.
Is This Part Compatible With Vehicles Outside GM Brands?
No; it primarily fits GM vehicles. The part meets GM OE specs and is intended as a direct replacement for GM factory components, so non‑GM compatibility is unlikely without confirming exact vehicle fitment.
How Often Should This PCV Valve Be Inspected or Replaced?
Inspect the PCV valve every 30,000 miles or during routine service; replace it every 60,000–90,000 miles or sooner if symptoms appear. The liberated motorist prioritizes prevention to avoid oil leaks and performance loss.
Does Installation Affect Vehicle Emissions Testing Results?
Yes. A properly installed PCV valve clears crankcase vapors like a freed wind, reducing blow-by emissions and helping the vehicle pass testing; a faulty or misinstalled valve can raise hydrocarbons and cause test failures, undermining emission compliance.
Are Replacement Hoses or Grommets Included or Sold Separately?
No — replacement hoses or grommets are sold separately. The liberated consumer is advised to obtain OEM-compatible hoses and seals to guarantee proper fit, prevent leaks, and preserve performance; separate purchase and proper installation are recommended.
Conclusion
In conclusion, the GM Genuine Parts 12637666 PCV valve measures 4.2 x 4.2 x 4.1 inches, weighs 0.16 ounces, and fits specified GM applications; it regulates crankcase vapors, cuts oil consumption, and installs simply. Question: is it right for the vehicle? Answer: verify OEM fitment before purchase. Performance and durability are consistently praised in 117 reviews (4.6/5). Like a well-tuned watch, it performs reliably, backed by clear warranty and return terms.
