RECOMMENDED SERVICE INTERVALS
6.6l (lb7) 2500hd / 3500hd
OIL CHANGE: Every 5,000 miles
TIRE ROTATION: Every 5,000 miles
FUEL FILTER REPLACEMENT: Every 15,000 miles (maximum)*
AUTOMATIC TRANSMISSION SERVICE: Every 25,000 miles
COOLANT FLUSH: Every 45,000 miles
FRONT & REAR DIFFERENTIAL: Every 45,000 miles
(sooner if launching a boat)
• Brake fluid and power steering fluid should be inspected during every service and flushed accordingly.
• Steering components should be lubricated during every oil change service.
• Air filter should be inspected during every service and replaced accordingly.
6.6l (lly) 2500hd / 3500hd
OIL CHANGE: Every 5,000 miles
TIRE ROTATION: Every 5,000 miles
FUEL FILTER REPLACEMENT: Every 15,000 miles (maximum)*
AUTOMATIC TRANSMISSION SERVICE: Every 25,000 miles
COOLANT FLUSH: Every 45,000 miles
FRONT & REAR DIFFERENTIAL: Every 45,000 miles
(sooner if launching a boat)
• Brake fluid and power steering fluid should be inspected during every service and flushed accordingly.
• Steering components should be lubricated during every oil change service.
• Air filter should be inspected during every service and replaced accordingly.
6.6l (lbz) 2500hd / 3500hd
OIL CHANGE: Every 5,000 miles
TIRE ROTATION: Every 5,000 miles
FUEL FILTER REPLACEMENT: Every 15,000 miles (maximum)*
AUTOMATIC TRANSMISSION SERVICE: Every 25,000 miles
COOLANT FLUSH: Every 45,000 miles
FRONT & REAR DIFFERENTIAL: Every 45,000 miles
(sooner if launching a boat)
• Brake fluid and power steering fluid should be inspected during every service and flushed accordingly.
• Steering components should be lubricated during every oil change service.
• Air filter should be inspected during every service and replaced accordingly.
6.6l (lmm) 2500hd / 3500hd
OIL CHANGE: Every 5,000 miles
TIRE ROTATION: Every 5,000 miles
FUEL FILTER REPLACEMENT: Every 15,000 miles (maximum)*
AUTOMATIC TRANSMISSION SERVICE: Every 25,000 miles
COOLANT FLUSH: Every 45,000 miles
FRONT & REAR DIFFERENTIAL: Every 45,000 miles
(sooner if launching a boat)
• Brake fluid and power steering fluid should be inspected during every service and flushed accordingly.
• Steering components should be lubricated during every oil change service.
• Air filter should be inspected during every service and replaced accordingly.
6.6l (lml) 2500hd / 3500hd
OIL CHANGE: Every 5,000 miles (def fluid should be added every service)
TIRE ROTATION: Every 5,000 miles
FUEL FILTER REPLACEMENT: Every 15,000 miles (maximum)*
AUTOMATIC TRANSMISSION SERVICE: Every 25,000 miles
COOLANT FLUSH: Every 45,000 miles
FRONT & REAR DIFFERENTIAL: Every 45,000 miles
(sooner if launching a boat)
• Brake fluid and power steering fluid should be inspected during every service and flushed accordingly.
• Steering components should be lubricated during every oil change service.
• Air filter should be inspected during every service and replaced accordingly.
