Chevrolet Impala 2018 Owner's Manual page 300

Recommended Fluids, Lubricants, and Parts
Recommended Fluids and Lubricants
Usage
Automatic Transmission
Engine Coolant
Engine Oil
Hood Latch Assembly, Secondary
Latch, Pivots, Spring Anchor, and
Release Pawl
Hydraulic Brake System
Key Lock Cylinders, Hood and Door
Hinges
Weatherstrip Conditioning
Windshield Washer
DEXRON-VI Automatic Transmission Fluid.
50/50 mixture of clean, drinkable water and use only DEX-COOL Coolant.
See Cooling System 0 224.
Engine oil meeting the dexos1 specification of the proper SAE viscosity
grade. ACDelco dexos1 is recommended. See Engine Oil 0 219.
Lubriplate Lubricant Aerosol (GM Part No. 89021668, in
Canada 89021674) or lubricant meeting requirements of NLGI #2 Category
LB or GC-LB.
DOT 3 Hydraulic Brake Fluid (GM Part No. 19353126, in
Canada 19299819).
Multi-Purpose Lubricant, Superlube (GM Part No. 12346241, in
Canada 10953474).
Weatherstrip Lubricant (GM Part No. 3634770, in Canada 10953518) or
Dielectric Silicone Grease (GM Part No. 12345579, in Canada 10953481).
Automotive windshield washer fluid that meets regional freeze protection
requirements.
Service and Maintenance
Fluid/Lubricant
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