January 26, 2013

L65 6.5L Detroit Diesel Maintenance Schedule (Suburban)

My new-to-me Suburban has had a rough previous life, clearly.  Over fourteen years of use, I'm now noticing signs of previous repairs that weren't done right and botched maintenance.  Well, I haven't found anything yet that isn't repairable, but the other issue is, I simply don't know the vehicle's maintenance history.  What has, or hasn't been done?  When was the transmission fluid last changed?  I know the coolant has been changed (since I bought it with only water in the system) and I know the transfer case fluid has been changed (since there was no fluid in it when I bought it).  It seems Diesel maintenance information, especially for an older Diesel engine is scarce online, so I had to resort to paper research to find the GM Diesel Supplement defined scheduled maintenance listing for "Long Trip" use on a Suburban.  These should be considered *maximum* values, not when you start thinking about doing them.

Every 8000 km
  • Engine Oil and Filter Change (or every 12 months, whichever occurs first).
  • Chassis Lubrication (or every 12 months, whichever occurs first).  
  • Drive Axle service.

Every 16000 km
  • Tire rotation
  • Shields and Underhood Insulation Inspection.  
  • Air Intake System Inspection.  
  • Thermostatically Controlled Engine Cooling Fan Check (or every 12 months, whichever occurs first).


Every 48000 km
  • Fuel Filter Replacement


Every 80000 km
  • Automatic Transmission Service


Every 96000 km
  • Crankcase Depression Regulator Valve (CDRV) System Inspection
  • Engine Accessory Drive Belt Inspection.
  • Exhaust Gas Recirculation (EGR) System Inspection (if equipped)


Every 240000 km
  • Cooling System Service (or every 60 months, whichever occurs first).

2 comments:

  1. no one follow this maintenance schedule but i like your post keep posting i learnd lot of new things from here

    ReplyDelete
  2. Thanks for sharing this wonderful blog with us. Nice post with great information and it is indeed informative and useful. Detroit Diesel

    ReplyDelete