GM Engines 19432779 - Vortec HD 350 L31 New Crate Engine

Nothing compares to a Factory Original new GM Crate Engines when it is time to replace the worn out 350ci Vortec engine in your 1996 thru 2002 Chevrolet or GMC pick-up and Vans. Part number 12681431 is the Heavy Duty replacement engine direct from GM Powertrain and fits most 3/4 and 1-Ton G-Series Vans, P-Series Trucks, Silverado's, Sierra's, and Suburban's. The Vortec HD version 350 uses a 4-Bolt main block, upgraded exhaust valves and cylinder heads for heavy duty applications. This engine is not intended for marine usage.

This engine features new components, brand new complete long block engine backed by a limited 3-year, 100,000 mile GM warranty when installed into an approved GM application. To verify your engine application, please contact our Tech Department with the VIN number from your vehicle or email your VIN info to our team.

Engine	L31 Vortec HD 350 Chevy Engine
Horsepower	250HP @ 4600RPM
Torque	330FT/LBS @ 2800RPM
Compression Ratio	9.3:1
Block	4-Bolt Main, 1-Pc Seal, 4.000" Bore
Crankshaft	3.480" stroke
Heads	Cast Iron; 64cc Vortec
Valves	1.940"/1.500"
Camshaft Lift	0.414"/0.428" Hydraulic Roller
Dur. @ 0.050"	191°/196°

Horsepower and Torque ratings are the original GM ratings from the most common application. Some year and model applications may differ slightly according to factory exhaust sytems, factory air intake systems, and other components.