Oil Change Indicator System: Diesel

The vehicle is equipped with an engine oil change indicator system. This system will alert you when it is time to change the engine oil by displaying the words "Oil Change Required" on the Electronic Vehicle Information Center (EVIC). The engine oil change indicator system is duty cycle based, which means the engine oil change interval may fluctuate depending on the personal driving style. Driving styles such as frequent stop and go type driving or extended idle time can increase the frequency of the engine oil change. This is the result of more frequent regeneration of the exhaust after treatment system, which can decrease the life of the engine oil. Failure to change the engine oil per the maintenance schedule can result in internal engine damage.

For information on resetting the Oil Change Indicator message, refer to "Oil Change Required - If Equipped," under "System Status (EVIC Displays)" in the "Electronic Vehicle Information Center (EVIC)" Service Information. Refer to MESSAGE CENTER - SERVICE INFORMATION - 2500 HD & 3500 HD .

Replace the engine oil and oil filter every 15, 000 miles (24 000 km) or six months, or sooner if prompted by the oil change indicator system. Under no circumstances should oil change intervals exceed 15, 000 miles (24 000 km) or six months or 500 hours, whichever comes first.