Okay that's an oil filler cap, how excited are you. But more importantly, it indicates that you are using the new Mobil One 0w40 EPS oil, not the 5w30 originally used in these LT-4 engines which was recommended and advertised by GM as the oil of choice for these high performance engines.
π§ ACDelco GM D303A Ignition Distributor Cap in Black - Genuine Original Equipment
9 Review
NOW Vitamin D3 Caps, 10,000 IU, 240 Caps
20 Review
π ACDelco GM Original Equipment D328A Ignition Distributor Cap - Reliable Performance in Sleek Black Design
8 Review
π ACDelco GT295 Fuel Tank Cap: Genuine GM Original Equipment
8 Review
Off-Road Fender Flares For Jeep Wrangler 2007-2018 JK & JKU Unlimited - Heavy Duty Flat Textured Steel Mud Guards In Black (Set Of 4) By Hikotor For Front And Rear Replacement (2 Or 4 Door Options)
47 Review
820Pcs Car Push Retainer Clips & Fasteners Assortment - Ford GM Toyota Honda Chrysler BMW Benz Nissan Subaru Audi Mazda
32 Review
25Pcs Fender Liner Screws For Toyota Avalon Camry Corolla Scion Lexus - OEM #90159-60498
35 Review
Gooacc 50Pcs Hood Insulation Retainer Clips - Perfect Replacement For Grand Cherokee, Dodge Ram, Chrysler PT Cruiser, Plymouth Laser, Neon - OEM Part Number: 4878883AA
33 Review