Chevy and GMC Duramax Diesel Forum banner
  • Hey Everyone! Enter your ride HERE to be a part of this months Ride of the Month Challenge!


  1. Parts For Sale
    4 brand New Oil filters Cat 1r-1807 Plus adapter to Make them Fit On a Duramax. Had the adapter on my lb7 for about 4,000 miles. $75 Let me know were i have to ship to to calculate shipping.
  2. General Discussion
    So I just replaced all 8 injectors all with new cups new high pressure lines new return line bolts. I cleaned the return lines really well. Still feel like I have some fuel in my oil and it’s smoking white after I accelerate. It’s black smoke and then white. I really need help here. Any help is...
  3. Introductions
    Hello everyone, new to the forum here and I am new to owning a Duramax! I recently inherited a 2003 chevy Silverado 2500hd Duramax lb7, my grandfather bought it brand new in 2003-04 and he pasted away 2 years ago today actually. I inherited the truck a year after his passing and I am wanting to...
  4. 01-04.5 LB7 Duramax Powertrain
    Woke up this morning and realized I have oil covering the undercarriage and tailgate. Checked all plugs and filters and fluid levels. Oil is way low. Started checking around the motor and found no leaks. When I got under the truck to look around I found a broken part. I have no idea what it is...
  5. 04.5-05 LLY Duramax Powertrain
    well i got my new injectors in today. cool. I went to vacuum out my cylinders and much to my surprise im vacuuming out oil... and that isn't cool because i didn't notice anygo in when i was pulling out my old injectors. can oil get in there when u have a bad injector or something?:help
  6. 01-04.5 LB7 Duramax Powertrain
    Hi guys, new to the forum and to diesels. I have read a lot of the threads about LB7 injector issues, but they still leave me with a question. People mention fuel in the oil from bad injectors, but no one seems to have had any bearing failure or other related problems. Have there been? How...
  7. Maintenance
    hey guys just thought i'd let you know O'Reilly's is running a sale on Mobil Delvac 1300 for 9.99 a gallon as opposed to normally 14.99. only when you buy a case of 4. Went and picked up a case yesterday and a Mobil M1-303 filter. gotta love oil changes for with quality oil and primo filter...
  8. Introductions
    Hello there. Just bought an 06 Chevy silverado 2500hd with a 10" lift and 39 1/2" tires. It has the 6.6l diesel engine with allison transmission. I love it so far except that I have a concern about oil leakage. I thought it was loose bolts but after tightening all the bolts I could find in...