Chevrolet Colorado 2015 Owner's Manual page 381

11-8 Service and Maintenance
Footnotes Maintenance
Schedule Additional Required
Services - Severe
(1) Or every two years, whichever
comes first. More frequent
replacement may be needed if the
vehicle is driven in areas with heavy
traffic, areas with poor air quality,
or areas with high dust levels.
Replacement may also be needed if
there is a reduction in air flow,
excessive window fogging, or odors.
(2) Or every four years, whichever
comes first.
(3) Check all fuel and vapor lines
and hoses for proper hook-up,
routing, and condition.
(4) 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.
(5) Extreme service for vehicles
mainly driven off-road in four-wheel
drive or used in farming, mining,
forestry, or Department of Natural
Resources (DNR). 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.
(6) Or every five years, whichever
comes first. See Cooling System on
page 10-16.
(7) Or every 10 years, whichever
comes first. Inspect for fraying,
excessive cracking, or damage;
replace, if needed.
(8) Or every three years, whichever
comes first.
Special Application
Services
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 10-82.