1. Lock Hardware Deals
  2. sku: 31870687970143741
  3. CHEVROLET 312657

CHEVROLET 312657 Liftgate Lock Cylinder Trailblezer

fits model: S1, Trailblazer. make: Chevy, Chevrolet. year: 2002–2009.

312657 Chevrolet 02-09 Chevy Trailblazer Liftgate Lock Cylinder S1 Used Oem

( Brand: Chevrolet ), ( Manufacturer Part Number: 312657 ), ( Model: TRAILBLEZER ), ( Remote Controls: Central Locking System ), ( Items Included: Liftgate Lock Cylinder ), ( Placement On Vehicle: Rear ), ( Features: Durable, Easy Installation ), ( Finish: Matte ), ( Performance Part: Yes ), ( Color: Black ), ( Material: Metal ), ( Vintage Part: No ), ( Ipn: 312657 S1 ), ( Year: 2005 ), ( Country Of Origin: United States )

Review CHEVROLET Chevy Liftgate Lock Cylinder Used Oem fits TRAILBLAZER S1 2002–2009

The **Chevrolet 312657 Liftgate Lock Cylinder (S1)** is a precision-engineered, direct-fit replacement part designed exclusively for **2002 through 2009 Chevrolet Trailblazer models**, ensuring seamless integration with the vehicle s original liftgate mechanism. Crafted from high-grade, corrosion-resistant materials, this lock cylinder is built to withstand the rigors of daily use, from harsh weather conditions to frequent opening and closing cycles, while maintaining smooth, reliable operation. The **S1 designation** indicates a specific variant tailored for Trailblazer models equipped with the **side-impact door lock system**, featuring a robust internal mechanism that includes a durable tumblers assembly and a reinforced latch to prevent jamming or wear over time. This cylinder is engineered to match the exact dimensions and pin configuration of the original equipment, guaranteeing a perfect fit without the need for modification to the surrounding frame or lock housing. Whether replacing a worn-out cylinder due to normal wear, a broken key, or a security upgrade, this part is designed to restore both functionality and security to your Trailblazer s liftgate. Its compatibility extends beyond basic functionality it also ensures that the liftgate operates in harmony with the vehicle s electronic keyless entry system, if equipped, by maintaining proper alignment with the door s locking mechanism. For those seeking a balance of durability, ease of installation, and manufacturer-level performance, the **Chevrolet 312657 Liftgate Lock Cylinder (S1)** stands as a dependable, off-the-shelf solution that restores confidence in your vehicle s safety and convenience features.

### **Pros and Cons of buying a Chevrolet 312657 (2002-2009 Chevy Trailblazer Liftgate Lock Cylinder S1)**

#### **Pros:**

1. **Direct Fitment** The part number (312657) is designed specifically for the 2002-2009 Chevrolet Trailblazer, ensuring compatibility without modifications.

2. **Authentic Replacement** This is an OEM-style lock cylinder, meaning it should function identically to the original equipment, reducing the risk of fitment issues.

3. **Reliability** Chevrolet s lock mechanisms are generally durable, and a genuine or high-quality aftermarket replacement should provide long-term use if installed correctly.

4. **Ease of Installation** The liftgate lock cylinder is a relatively straightforward component to replace, requiring only basic tools and mechanical skill.

5. **Prevents Theft** A functional lock cylinder ensures the liftgate remains secure, reducing the risk of unauthorized access.

6. **Cost-Effective Alternative** Purchasing a new lock cylinder is often cheaper than replacing the entire liftgate mechanism or hiring a locksmith.

7. **Compatibility with Aftermarket Upgrades** If you plan to modify the liftgate (e.g., adding a remote release or alarm), this part may be necessary for proper integration.

#### **Cons:**

1. **Potential Counterfeit Risk** Some aftermarket parts, even with matching part numbers, may be counterfeit or low-quality, leading to premature failure or poor performance.

2. **Wear and Tear on Related Components** If the surrounding lock mechanism (striker plate, latch, or wiring) is damaged, replacing just the cylinder may not fully resolve the issue.

3. **Skill Dependency** If you lack mechanical experience, improper installation could lead to misalignment, difficulty opening the liftgate, or even damage to the door frame.

4. **Limited Availability of OEM Parts** While this part exists, OEM (Original Equipment Manufacturer) lock cylinders may be harder to find than generic aftermarket alternatives, potentially increasing cost.

5. **Possible Sticking or Binding** Over time, lock cylinders can develop rust or debris buildup, causing them to stick even if the part itself is functional.

6. **Warranty Concerns** If the vehicle is under warranty, replacing a lock cylinder with an aftermarket part may void certain coverage, depending on the manufacturer s policies.

7. **Security Trade-Offs** Some aftermarket lock cylinders may not meet the same security standards as OEM parts, though this is less likely with a reputable supplier.

---

### **Conclusion**

Buying the **Chevrolet 312657 lock cylinder for a 2002-2009 Trailblazer** is a practical solution if the liftgate lock is malfunctioning, broken, or lost. The part is designed for direct fitment, ensuring compatibility, and replacing it is a cost-effective way to restore functionality without major repairs. However, the success of the purchase depends on sourcing a high-quality, genuine (or trusted aftermarket) part and ensuring proper installation.

If you are comfortable with basic automotive repairs, this is a straightforward DIY project. If not, consulting a mechanic may be advisable to avoid further complications. Additionally, inspecting the surrounding lock mechanism (such as the striker plate and wiring) beforehand can prevent recurring issues.

---

### **Recommendation**

1. **Verify the Part s Authenticity** Purchase from a reputable supplier (e.g., RockAuto, eBay with positive reviews, or a local auto parts store) to avoid counterfeit or low-quality replacements.

2. **Check for Compatibility** Confirm that the part number (312657) matches your exact vehicle year, trim, and market (some models have slight variations).

3. **Inspect Related Components** Before installation, ensure the striker plate, latch, and wiring are in good condition to prevent future problems.

4. **Follow Installation Instructions Carefully** If you re unfamiliar with lock cylinder replacement, watch a video guide or seek professional help to avoid misalignment or damage.

5. **Consider a Backup Plan** If the issue persists after replacement (e.g., the cylinder still doesn t engage properly), the problem may lie elsewhere (e.g., a faulty actuator or wiring issue).

6. **Test Thoroughly After Installation** Open and close the liftgate multiple times to confirm smooth operation and security.

**Final Verdict:** This part is a worthwhile purchase for restoring liftgate functionality in a 2002-2009 Trailblazer, provided you source it responsibly and handle the installation correctly. If the problem recurs, further diagnosis may be necessary.

Details:

part #: 312657 price

  • $30.00

specifications carlockiio:

  • for models: S1, Trailblazer
  • for makes: Chevy, Chevrolet
  • for years: 2002-2009
  • brand: Chevrolet
  • mpn: 312657
  • model: Trailblezer
  • remote controls: Central Locking System
  • items included: Liftgate Lock Cylinder
  • placement on vehicle: Rear
  • features: Durable, Easy Installation
  • finish: Matte
  • performance part: Yes
  • color: Black
  • material: Metal
  • vintage part: No
  • ipn: 312657 S1
  • year: 2005
  • country of origin: United States

seller carlockiio:

  • city: East Sandwich, Massachusetts
  • # reviews: 4675
  • rating: 99.7%

general carlockiio:

  • condition: Used
  • Car Truck Parts Accessories > Exterior Parts Accessories > Exterior Locks Lock Hardware

payments carlockiio:

  • wallet: Paypal
  • other
  • money order
  • credit card: Visa

shipping carlockiio:

  • service: USPS Ground Advantage
  • class: Standard
  • type: Fixed
  • carrier: USPS
  • transit: 4-9 Days
  • cost: $15.00

returns carlockiio:

  • paid by: Buyer
  • time: 30 Days
  • policy: Returns Accepted

offer carlockiio:

  • availability: In Stock
  • best offers: True
  • sold: 0
  • quantity: 1
  • started: May 30, 2026
  • options: Ship-to-home
for models: s1, trailblazer, for makes: chevy, chevrolet, for years: 2002-2009, remote controls: central locking system, items included: liftgate lock cylinder, placement on vehicle: rear, features: durable, easy installation, finish: matte, performance part: yes, vintage part: no, year: 2005, country of origin: united states,
manufacturer: chevrolet, category: auto parts > car truck parts accessories > exterior parts accessories > exterior locks lock hardware, color: black, material: metal, sku: 31870687970143741,
Chevrolet 312657 Is Similar To:
carlockiio logo
1 offer $30.00 USD
  • Used. Offer #1 priced at $30.00 + $15.00 shipping estimate = $45.00* total. +$15.00 shipping

Copyright © carlockiio.com