CHEVY Throttle Body Engine 977-313 General 4.3L

( Brand: Chevy ), ( Manufacturer Part Number: 2007-2009 ), ( Model: 2008-2014 EXPRESS 1500, 2008-2012 MALIBU, 2007-2009 AURA ), ( Connector: 6-blade ), ( Throttle Plate Diameter: In ), ( Items Included: One Complete Throttle Body W/sensor ), ( Throttle Body Actuation Type: Electric ), ( Custom Bundle: No ), ( Fuel System Type: Fi ), ( Bore Diameter: 72mm ), ( Placement On Vehicle: Front ), ( Fuel Type: Gasoline ), ( Throttle Position Sensor Included: Yes ), ( Manufacturer Warranty: 5 Year ), ( Compatible Makes: For Chevrolet, Gmc, Pontiac, Saturn ), ( Connector Type: Blade ), ( Main Port Inside Diameter In : 3-1/16 ), ( Features: Electronic ), ( Engine: V6 3.6l, V6 4.3l ), ( Color: Silver ), ( Fitment Type: Direct Replacement ), ( Material: Aluminum ), ( Weight: 3 Lb ), ( Type: Throttle Body ), ( Ipn: 977-313 ), ( Model-2: 2007-2013 Silverado 1500, 2008-2014 Savana 1500 ), ( Model-3: 2007-2013 Sierra 1500, 2007-2009 G6, 2008-2009 G8 ), ( Oe/oem Part Number: 12629992, 217-3151 ), ( Fuel: Petrol )

Review CHEVY General Motors Throttle Body 4.3l Engine Gmc fits SILVERADO SIERRA 1500 2007–2013

The **977-313 Throttle Body** is a high-performance, direct-fit replacement designed specifically for the **4.3L Vortec V8 engine** found in **2007 2013 Chevrolet Silverado 1500** and **GMC Sierra 1500** models, including the **HD and LT trim levels**. Engineered to meet or exceed OEM specifications, this throttle body is crafted from durable **aluminum alloy** with precision-machined internals to ensure smooth operation and optimal airflow. Its **electronic throttle control (ETC) system** integrates seamlessly with the vehicle s factory wiring harness, eliminating the need for extensive modifications or aftermarket adapters, making it a straightforward upgrade for both performance enthusiasts and daily drivers seeking improved throttle response. The **smooth-bore design** reduces turbulence and enhances airflow efficiency, while the **sealed gasket** prevents leaks, ensuring a clean and reliable fit. Whether you're looking to enhance throttle response, improve fuel economy, or prepare your truck for a more aggressive tune, this throttle body delivers a **direct, bolt-on solution** that maintains stock functionality while offering subtle yet noticeable performance gains. Built to withstand the demands of high-RPM operation and daily driving, it s an ideal choice for those who want a **cost-effective, no-compromise upgrade** without sacrificing reliability.

### **Pros and Cons of Buying a General 977-313 Throttle Body for a 2007 2013 4.3L Chevy Silverado 1500 / GMC Sierra**

1. **Direct OEM Replacement** The 977-313 throttle body is a direct fit for your 4.3L V6 engine, ensuring compatibility with the factory wiring harness, sensors, and mounting points. This eliminates the need for extensive modifications or adapters.

2. **Improved Throttle Response** A clean, well-maintained throttle body can enhance throttle response by reducing carbon buildup and ensuring smoother airflow. If your original throttle body was dirty or clogged, replacing it may restore factory-like performance.

3. **Potential Fuel Efficiency Gains** A properly functioning throttle body allows for better air intake, which can slightly improve fuel economy, especially if the original unit was restricted.

4. **Compatibility with Aftermarket Upgrades** Since this is an OEM-style part, it works well with common aftermarket modifications like performance air intakes, ECU tuners, or cold air intake systems.

5. **Ease of Installation** The part is designed for straightforward installation, requiring only basic tools. Most mechanics or DIYers can replace it in under an hour with minimal effort.

6. **Cost-Effective Solution** Compared to full engine rebuilds or major intake upgrades, replacing just the throttle body is a relatively inexpensive fix, typically costing between $100 $250 depending on brand and condition.

7. **Prevents Long-Term Damage** A failing throttle body can cause rough idling, stalling, or even damage to the fuel system or catalytic converter if left unaddressed. Replacing it early can prevent more costly repairs.

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1. **Potential for Counterfeit Parts** The aftermarket for throttle bodies can be flooded with low-quality or counterfeit parts, especially from unknown sellers. A poorly made throttle body may fail prematurely or cause drivability issues.

2. **No Performance Gains Without Tuning** Simply replacing the throttle body will not significantly improve horsepower or torque unless paired with an ECU tune. The engine control module (ECU) may still be running on stock parameters, limiting benefits.

3. **Carbon Buildup Can Recur** Even a new throttle body can accumulate carbon deposits over time, especially in vehicles with rich fuel mixtures or poor air filters. Regular cleaning (every 30,000 50,000 miles) is recommended to maintain performance.

4. **Wiring or Sensor Issues** If the original throttle body s wiring harness or sensors were damaged, a direct replacement may not resolve electrical problems. Inspecting the harness and sensors is wise before installation.

5. **Limited Longevity with Aggressive Driving** While durable, throttle bodies are not built for extreme modifications (e.g., forced induction or high-RPM tuning). Under heavy stress, they may wear out faster than stock.

6. **Installation Risks if Improperly Done** Improper sealing, loose connections, or incorrect sensor calibration during installation can lead to leaks, poor performance, or even engine stalling.

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The **General 977-313 throttle body is a solid, cost-effective choice** for restoring or maintaining throttle response in your 2007 2013 4.3L Silverado/Sierra. It offers a direct OEM replacement with minimal modifications required, making it ideal for basic maintenance or minor performance improvements. However, it is not a "power upgrade" on its own expect noticeable benefits only if the original unit was failing or dirty.

- **Purchase from a reputable supplier** (e.g., RockAuto, Summit Racing, or a trusted local parts store) to avoid counterfeit parts.

- **Clean the throttle body regularly** (use throttle body cleaner and a soft brush) to prevent carbon buildup.

- **Consider an ECU tune** if you want to unlock additional performance gains after replacement.

- **Inspect wiring and sensors** before installation to ensure no underlying electrical issues.

If your throttle body is causing rough idling, stalling, or poor throttle response, **replacing it with the General 977-313 is a worthwhile investment**. It s a straightforward fix that can restore factory-like operation without major expense. However, if you re looking for significant power gains, pair this with an ECU tune and other supporting modifications (e.g., air intake, exhaust, or fuel system upgrades).

For most daily drivers, this part will extend the life of your engine and improve drivability making it a **recommended upgrade for maintenance or mild performance enhancement**.

Details:

Came off a 2009 Silverado works with any gmt900 that I know of. Comes with pigtail on it This is an oem throttle body for a 4 bolt 6 pin. Works on tbs intake manifold.

specifications throobo:

• for models: 1500, Silverado, Sierra
• for makes: Chevy, Gmc
• for years: 2007-2013
• brand: Chevy
• mpn: 2007-2009
• model: 2008-2014 Express 1500, 2008-2012 Malibu, 2007-2009 Aura
• connector: 6-blade
• throttle plate diameter: In
• items included: One Complete Throttle Body W/sensor
• throttle body actuation type: Electric
• custom bundle: No
• fuel system type: Fi
• bore diameter: 72mm
• placement on vehicle: Front
• fuel type: Gasoline
• throttle position sensor included: Yes
• manufacturer warranty: 5 Year
• compatible makes: For Chevrolet, Gmc, Pontiac, Saturn
• connector type: Blade
• main port inside diameter in : 3-1/16
• features: Electronic
• engine: V6 3.6l, V6 4.3l
• color: Silver
• fitment type: Direct Replacement
• material: Aluminum
• weight: 3 Lb
• type: Throttle Body
• ipn: 977-313
• model-2: 2007-2013 Silverado 1500, 2008-2014 Savana 1500
• model-3: 2007-2013 Sierra 1500, 2007-2009 G6, 2008-2009 G8
• oe/oem part number: 12629992, 217-3151
• fuel: Petrol

shipping throobo:

• carrier: USPS
• type: Calculated
• cost: $9.81
• transit: 5-11 Days
• service: USPS Ground Advantage
• class: Standard

seller throobo:

• # reviews: 91
• city: Bassett, Virginia
• rating: 98.6%

offer throobo:

• quantity: 1
• options: Ship-to-home
• best offers: True
• availability: In Stock
• sold: 0
• started: April 19, 2026

returns throobo:

• policy: No Returns

payments throobo:

• credit card: Mastercard
• wallet: Paypal
• other

general throobo:

• condition: Used
• Car Truck Parts Accessories > Air Fuel Delivery > Throttle Bodies

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