Product Description
Genuine GM 12561513 LS Crankshaft Key
Fits 1997–2013 GM LS-Based V8 Engines | 4.8L, 5.3L, 5.7L, 6.0L, 6.2L & 7.0L
The Genuine GM 12561513 Crankshaft Key is a critical engine timing component used to properly index and drive the lower timing sprocket and oil pump spline on GM LS-based engines. This OEM crankshaft key ensures precise alignment between the crankshaft, timing set, and oil pump, preventing timing errors and oiling issues. Designed to factory specifications, it is ideal for engine rebuilds, timing chain service, crankshaft replacement, or oil pump upgrades on both stock and performance LS engines.
Key Features & Benefits
- Ensures Accurate Timing Component Alignment: Precisely locates the crankshaft timing gear and oil pump drive to maintain correct cam timing and oil pump operation.
- Drives Timing Sprocket & Oil Pump Spline: Critical interface between the crankshaft and lower timing gear, ensuring consistent oil pressure and reliable engine operation.
- OEM GM Quality & Precision: Manufactured to GM specifications for proper fitment, hardness, and durability under high load and high RPM conditions.
- Compatible with OEM & Aftermarket Crankshafts: Designed to fit all factory LS crankshafts and most aftermarket crankshaft designs using OEM-style keyways.
- Essential for Engine Rebuilds & Timing Service: Should always be inspected and replaced during timing chain, oil pump, or crankshaft service to ensure long-term reliability.
Key Fitments
- GM LS-Based V8 Engines: 1997–2013 4.8L, 5.3L, 5.7L, 6.0L, 6.2L, and 7.0L
