OEM CertifiedBrand New In Box
Key Diagram & Connector Pinout Callouts
DI Fuel PumpCam-driven
High-pressure direct injection pump mounted on RH cylinder head
AFM SolenoidsValley
Four lifters deactivate cylinders under light load for economy
Starter PocketLower RH
Fits OEM 12V PMGR starter with 2-bolt flange
Primary OEM Part #L83-12660000
Inventory Available 6 Ready to Ship
Chevrolet 5.3L L83 V8 EcoTec3 Engine Long Block Assembly
Manufacturer: General Motors OEM / GM Performance • SKU: ENG-GM-53L-L83
Standard Dealership Market Price:$5600.00
Direct Buy Now Price:$4450.00
Save 21% ($1150)
Quantity:
1
(Max 6 in batch) Same-day Dispatch
24-Month GM Parts Limited Warranty
OEM Interchanges & Cross Reference
Mechanics can cross-reference with these stamped casing and manufacturer numbers:
L83-12660000 (Primary)L831266000019258629126-60000
Product Overview & Technical Description
Genuine GM 5.3-liter L83 V8 EcoTec3 engine assembly with direct fuel injection, Variable Valve Timing (VVT), and Active Fuel Management (AFM) cylinder deactivation. Die-cast aluminum block with cross-bolted main caps. Ships in sealed GM factory crate ready for mechanic installation across Silverado, Sierra, Tahoe, Yukon, and Suburban platforms.
Key Engineering Features:
- Brand new factory crated long block with heads, valvetrain, and oil pump
- Direct injection pump and high-pressure rails pre-installed
- VVT and AFM solenoid packs pre-installed
- Rated 355 HP @ 5,600 RPM / 383 lb-ft @ 4,100 RPM
Guaranteed Vehicle Fitment (2014–2026)
Supported MakesChevrolet, GMC
Model Years Covered2014 – 2018
Eligible ModelsSilverado 1500 • Sierra 1500 • Tahoe • Yukon • Suburban
Engine Platform5.3L L83 V8 VVT AFM
Hardware & Electrical Specs
Operating Voltage:12V system integration
Pin Terminal Count:42 Pins
Terminal Plating:Engine harness breakout for COP, DI injectors and VVT/AFM solenoids
Protocols / Bus:Direct OEM ECM integration
Displacement5.3L (5,328 cc)
Bore & Stroke95.25 mm x 92.0 mm (Plasma Transferred Wire Arc bore)
ValvetrainOHV 2 valves per cylinder, VVT + AFM
Block MaterialAluminum with cross-bolted main caps
Oil Capacity8.0 Quarts
Boxed Weight392 lbs
Box Dimensions36.0 x 30.0 x 31.0 in (Crated on pallet)
VIN Flashing / ProgrammingRequired via Pass-Thru