2014 Chevrolet Express 2500 Cargo Owner Manual - Page 352

11-8 Service and Maintenance (5) Or every 10 years, whichever comes first. Inspect for fraying, excessive cracking, or damage; replace, if needed. (6) Or every 10 years, whichever comes first. (7) 2500/3500 series vehicles only. For severe commercial use vehicles, see Special Application Services on page 11-8. . Footnotes - Maintenance Schedule Additional Required Services - Severe (1) Check all fuel and vapor lines and hoses for proper hook-up, routing, and condition. (2) Or every four years, whichever comes first. (3) Do not directly power wash the transfer case output seals. High pressure water can overcome the seals and contaminate the transfer case fluid. Contaminated fluid will decrease the life of the transfer case and should be replaced. (4) Or every five years, whichever comes first. See Cooling System on page 10-17. Special Application Services . Vehicles with Dual Wheels: Check dual wheel nut torque at 160, 1 600 and 10 000 km (100, 1,000 and 6,000 mi) of driving. Repeat this service whenever a tire/wheel is serviced or removed. Severe Commercial Use Vehicles Only: Lubricate chassis components every 5 000 km/ 3,000 mi. Have underbody flushing service performed. See "Underbody Maintenance" in Exterior Care on page 10-86. .