I was looking through some stuff on my computer and found this. I can't remember where I found it, as it looks like I forgot to save the link to it, as well. I think it's from the articles section here at TDS, but I looked and couldn't find it. It is not my work, but here it is anyway, hopefully it will help you:
"Service Checkups for Diesel
• Once per month: Check all fluid levels under the hood. Automatic transmissions and most power steering fluids need to be checked hot with the engine running, check the coolant in the overflow bottle, do not remove the radiator cap. Note any signs of leaks or abnormal conditions--flapping drive belts, bulging hoses. Check tire pressure and look for abnormal wear. If you own a diesel, drain the water seperator, if equiped.
• Every 3000-6000 miles: Lubricate, Oil and Filter. Harsh conditions require more frequent service than highway miles. Even if you put very little mileage on a vehicle, it still should be done twice a year. A running engine produces gases in the crankcase that break down the oil, even while the vehicle sits. I do mine on 5000 mile intervals to coincide with:
• Every 5000 miles: Tire rotation. Front tires usually wear faster than rears because they get some side slip from cornering and have more up and down movement than the rears. It's best to rotate the tires before abnormal wear becomes apparent. When rotating, cross the tires from one axle left to right while rotating the other two front to back. This ensures that the each tire ends up on a different corner of the vehicle than previously, matching the wear patterns on all four. It is acceptable to have a radial tire rotate in a different direction than before providing its tread is not designed to rotate in one direction only. Some high performance tires are directional, as well as some dress wheels. It's easier to remember to rotate your tires if you have it done with another service. If you feel your vehicle needs the oil changed every 3000 miles, then rotate your tires every other time.
• Once a year: Have all the lights, the windshield wipers, battery and cables, charging and starting systems, belts and hoses checked and serviced as needed. Have the radiator and air conditioning condenser fins cleaned out. If you can find a shop with a policy of giving credit for any refrigerant recovered from you vehicle's air conditioning system, have the system recovered, evacuated to remove moisture and recharged. Have the entire vehicle inspected for leaks, and the cooling system and radiator cap pressure tested.
• Every 15000 miles: Complete vehicle inspection including brakes, chassis fluid levels and steering and suspension components for wear. The wheel bearings, if servicable, should be cleaned and repacked and the brake caliper slides cleaned and lubed. Have the wheel alignment checked. Have the cooling system ph checked to prevent leaks due to gasket or hose deterioration from electrolysis. In areas with highly alkiline water have the cooling system chemically treated and flushed. The air and fuel filters should be replaced and if you own a very old car (conventional ignition or carburated), it's time for a tune-up. Diesel vehicles should have a special conditioner added to their cooling system at this time. The additive prevents deterioration of the cylinder walls. The amount depends on cooling system capacity, but the minimum recommended is 4 oz per gallon.
• Every 30,000 miles: This should be the first really major service for your vehicle. The services listed above should be done as well as the following. The coolant should be drained and replaced, possibly the system flushed. The trans fluid should be drained and the filter cleaned or replaced. Even if the engine is running fine, at least have the computer system checked for trouble codes and the engine scope analyzed for potential problems. If your vehicle is five years or older, its probably time for a tune-up including an injector service. If you own a diesel, consider having the injection pump timing and glow plug system checked. Diesels also need to have the conditioner added to their cooling system during the service--4 oz per gallon total cooling system capacity is the minimum, 9.6 oz per gallon maximum.
• At 60,000 miles: It's pretty much the same as a 30,000 mile service, except that cars newer than five years old should have the spark plugs changed and the fuel injectors serviced. Most of these vehicles don't have the ignition components of the past, and the spark plugs are the only parts that wear. If the throttle body is not deposit resistant, it and the idle by-pass ports should be cleaned as well. If the hoses and belts are original, it would be a good idea to replace them at this point. If your car has a timming belt, it may be time to have it replaced.
• At around 100,000 miles you should have the axle lube changed if your vehicle is a rear or four wheel drive, as well as manual transmission fluid drained and replaced.
If the timing belt has not already been replaced, this is about the maximum mileage recommended by most manufacturers, so have it done to prevent being stranded or causing major internal engine damage. If the car has a timing chain, have it inspected for wear or loosness.
The above services can be done by yourself (excluding those requiring special equipment) or by any shop, not necessarily the dealer. Some shops offer free multi-point inspections and services that cover many of the above items. However, it is a good idea to check with the dealer service department as they have access to bulletins and recalls that others may not know about."
EDIT - if anybody recognizes this or knows who wrote it, PLEASE let me know so I can give credit where it's due. Thank you.