Product Description
Genuine GM Oil Fill Cap “5W-30” – GM Part #12573337
Fits 1997–Newer GM LS-Based V8 Engines | 4.8L, 5.3L, 5.7L, 6.0L & 6.2L
The Genuine GM 12573337 Oil Fill Cap is the correct OEM replacement for LS-based GM V8 engines that require 5W-30 engine oil. Designed to meet GM factory specifications, this cap ensures a proper seal at the valve cover oil fill port, preventing oil leaks, contamination, and loss of crankcase pressure. Ideal for replacing a missing, damaged, or worn cap, it includes a pre-installed sealing O-ring to restore factory-level fitment and reliability.
Key Features & Benefits
- Factory-Correct 5W-30 Oil Identification: Clearly marked for engines requiring 5W-30 oil, ensuring proper service and maintenance.
- OEM GM Fit & Finish: Manufactured to GM OE specifications for direct fitment on LS valve covers without modification.
- Includes Integrated Sealing O-Ring: Provides a tight, leak-free seal to prevent oil seepage and contamination.
- Restores Proper Crankcase Sealing: Helps maintain correct crankcase pressure and cleanliness by securely sealing the oil fill port.
- Ideal for Maintenance & Engine Refreshes: Perfect replacement during routine service, engine rebuilds, or valve cover swaps.
Key Fitments
- LS-Based GM V8 Engines: 1997–Newer 4.8L, 5.3L, 5.7L, 6.0L, 6.2L
- Engine Codes: LS1, LS2, LS3, LS6, L99, LSA, L92, L9H, L94, L76, L77, LY6, L96, LFA, LZ1, LY5, LMG, LMF, LH6, LC9, LY2, L20, L33, LQ4, LQ9, LR4, LM7, L59, LS4, LH8, LH9
