2012 Chevrolet Impala Owner's Manual - Page 312

11-8 Service and Maintenance Footnotes - Maintenance Schedule Additional Required Services - Severe a) Or every two years, whichever comes first. b) Check all fuel and vapor lines and hoses for proper hook‐up, routing, and condition. Check that the purge valve, if the vehicle has one, works properly. Replace as needed. c) Or every four years, whichever comes first. d) Or every five years, whichever comes first. See Cooling System on page 10‑12. e) Or every 10 years, whichever comes first. Inspect for fraying, excessive cracking, or damage; replace, if needed. Special Application Services . Additional Maintenance and Care Your vehicle is an important investment and caring for it properly may help to avoid future costly repairs. To maintain vehicle performance, additional maintenance services may be required. It is recommended that your dealer perform these services - their trained dealer technicians know your vehicle best. Your dealer can also perform a thorough assessment with a multi‐point inspection to recommend when your vehicle may need attention. The following list is intended to explain the services and conditions to look for that may indicate services are required. Battery The battery supplies power to start the engine and operate any additional electrical accessories. Severe Commercial Use Vehicles Only: Lubricate chassis components every 5 000 km/ 3,000 mi. Have underbody flushing service performed once a year. .