1. Car & Truck Engines Used/New Products
  2. sku: 3990946317728533
  3. CHEVROLET 12457703

CHEVROLET 12457703 Engine Vi 4.8L

fits model: 1500, Silverado. make: Chevrolet. year: 1999.

12457703 Chevrolet Used Engine Assembly Fits 1999 Silverado 1500 Pickup 4.8l Vi

( Manufacturer Part Number: 12457703 ), ( Manufacturer Warranty: 90 Day ), ( Genuine Oem: Yes ), ( Seller Notes: Injectors ), ( Interchange Item Code: 300 ), ( Color: Blue ), ( Number Of Valves: 16 ), ( Engine Size: 4.8l ), ( Fuel Type: Gas ), ( Type: Engine Complete Assembly )

Review CHEVROLET Used Engine Assembly Fits Pickup 4.8l Vi fits SILVERADO 1500 1999

The Chevrolet 12457703 engine is a 4.8-liter small-block V8 powerhouse specifically designed for the 1999 Silverado 1500 pickup truck. This engine is an essential component of the classic American workhorse, combining power, efficiency, and reliability in one impressive package.

The 4.8-liter V8 engine boasts an overhead valve design with aluminum cylinder heads. This design allows for a more compact size, reducing weight and improving overall performance. The engine features a cast iron block, providing durability and stability, while the aluminum cylinder heads offer superior heat dissipation.

The engine utilizes sequential fuel injection technology, which optimizes fuel delivery for each cylinder, ensuring efficient combustion and improved power output. The system employs a throttle position sensor, which adjusts fuel delivery based on driving conditions for optimal performance.

The 1999 Silverado 1500 4.8L V8 engine produces a robust 285 horsepower at 4800 RPM and 305 lb-ft of torque at 2800 RPM. These impressive power figures allow the Silverado to tow heavy loads and carry substantial payloads with ease.

Additionally, the engine is equipped with a hydraulic roller camshaft and a variable valve timing system, which adjusts intake and exhaust valve timing to optimize engine performance across the entire RPM range. This advanced technology enhances engine efficiency, reduces emissions, and provides smooth, responsive power.

The Chevrolet 12457703 engine is also known for its reliability and longevity. Its robust design, combined with regular maintenance, allows it to deliver years of dependable service. The engine's oil filter housing and oil cooler are easily accessible for routine maintenance, ensuring that the engine stays in top condition.

In summary, the Chevrolet 12457703 engine is a powerful, efficient, and reliable powertrain that perfectly complements the 1999 Silverado 1500 pickup truck. Its advanced features, including sequential fuel injection, hydraulic roller camshaft, and variable valve timing system, deliver impressive power output and optimize performance for various driving conditions. This engine is a testament to Chevrolet's commitment to designing high-performing, durable engines for their trucks.

The Chevrolet 1500 4.8L V8 engine, specifically model number 12457703, was used in various Chevrolet trucks produced between 1991 and 2000. Here are some pros and cons of buying this engine for your 1999 Silverado:

Pros:

1. Reliability: This engine is known for its durability and reliability. It has a simple design and uses robust components, making it suitable for heavy-duty use.

2. Fuel Efficiency: Compared to other V8 engines, the 4.8L V8 is relatively fuel-efficient.

3. Power: With 285 horsepower and 305 lb-ft of torque, the engine provides adequate power for towing and hauling.

4. Availability: The engine is widely available on the used market, making it easier to find and purchase.

5. Affordability: Because it's a used engine, it's generally more affordable compared to a new engine.

Cons:

1. Emissions: The 4.8L V8 engine does not meet current emission standards, so it may not be suitable for use in areas with strict emission regulations.

2. Maintenance: The engine requires regular maintenance to keep it running smoothly, including oil changes, spark plug replacement, and timing belt replacement every 60,000 miles.

3. Age: The engine is over 20 years old, so it may have some wear and tear that could lead to potential issues.

4. Compatibility: Ensure that the engine is compatible with other systems in your 1999 Silverado, such as the transmission and electrical systems.

5. Performance: While the engine provides adequate power, it may not offer the same level of performance as newer engines.

Conclusion:

The Chevrolet 1500 4.8L V8 engine, model number 12457703, is a reliable and powerful option for your 1999 Silverado. Its fuel efficiency, availability, and affordability are additional benefits. However, it may not meet current emission standards, require regular maintenance, and have compatibility issues. Additionally, its age and potential wear and tear could lead to potential problems. Ultimately, the decision to purchase this engine depends on your specific needs, budget, and preferences. If you prioritize reliability, power, and affordability, this engine could be a good choice. However, if you're concerned about emissions or performance, you may want to consider other options.

Recommendation:

If you're set on buying a used engine for your 1999 Silverado and prefer the 4.8L V8, make sure to have it inspected by a trusted mechanic before purchasing. This will help you identify any potential issues and ensure that the engine is compatible with your truck. Additionally, consider investing in any necessary repairs or upgrades to meet current emission standards, if applicable. If you value performance and emissions compliance, you may want to explore other engine options, such as the 5.3L V8 or a newer engine.

Details:

Parts go back into cars rather than landfill. All parts are covered by warranty. 90 DAY GUARANTEE. Unless specified as Universal this is a direct fit Engine Complete Assembly.

This part fits vehicles made in the following years 1999. Original parts mean a perfect fit. Every part is cleaned, tested and inspected by experts.

part #: 12457703 prices

  • $848.68-$1203.99

specifications grokengines:

  • for models: 1500, Silverado
  • for makes: Chevrolet
  • for years: 1999
  • mpn: 12457703
  • manufacturer warranty: 90 Day
  • genuine oem: Yes
  • seller notes: Injectors
  • interchange item code: 300
  • color: Blue
  • number of valves: 16
  • engine size: 4.8l
  • fuel type: Gas
  • type: Engine Complete Assembly

offer grokengines:

  • quantity: 1
  • sold: 0
  • options: Ship-to-home
  • availability: In Stock
  • best offers: True
  • started: February 23, 2025

shipping grokengines:

  • class: Freight
  • service: Flat Rate Freight
  • cost: $0.00
  • type: Fixed

general grokengines:

  • Car Truck Parts Accessories > Engines Engine Parts > Engines
  • condition: Used

payments grokengines:

  • other
  • credit card: Visa
  • wallet: Paypal

seller grokengines:

  • # reviews: 0
  • rating: 0.0%
  • city: Fort Worth, Texas

returns grokengines:

  • time: 60 Days
  • policy: Returns Accepted
  • paid by: Seller
for models: 1500, silverado, for makes: chevrolet, for years: 1999, manufacturer warranty: 90 day, genuine oem: yes, seller notes: injectors, interchange item code: 300, number of valves: 16, engine size: 4.8l, fuel type: gas, type: engine complete assembly,
manufacturer: chevrolet, category: auto parts > car truck parts accessories > engines engine parts > engines, color: blue, sku: 3990946317728533,

Chevrolet 12457703 Is Similar To:

grokengines logo
3 offers $848.68–$1203.99 USD
  • Offer #1: $1203.99 price + $0.00 shipping estimate = $1203.99* total. No accessories are warrantied, under any circumstances, if left with the item. GMC SIERRA PICKUP 99 4.8L (VIN V, 8th digit, 8-294), AT.FREE SHIPPING
  • Offer #2: $848.68 price + $249.99 shipping estimate = $1098.67* total. SILVERADO PICKUP 99 4.8L (VIN V, 8th digit, 8-294), AT SIERRA PICKUP 99 4.8L (VIN V, 8th digit, 8-294), AT.+$249.99 shipping
  • Offer #3: $875.00 price + $175.00 shipping estimate = $1050.00* total.+$175.00 shipping

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