its just a vent that blows down on the side of the engine, i found mine when it blew diesel fuel all over the bottom of my truck and all over the boat

 

The LB7 uses an open PVC system while the LLY, LBZ and LMM use a closed system. Here's pics of the LB7 system.

 

Yep, all 3 of my LB7s that have had injector problems, got the nice anti-rust undercoating

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If it's still under the 200k warrenty for the injectors, dump a gallon of diesel into the crankcase and take it to the dealer.....

 

 

OK so I have been checking my balance rates on and off for the last week, and number 8 is now running between +8 and +12 in drive, number 1 is between +5.9 and +6.5 in drive. Will the dealer replace them?

 

take out an programmers and reprogram it back to stock and get to the dealer, they should replace them yous is an 02, and if it has less than 200k miles on it

 

Will they replace all 8 or just the bad one? What will they say about my exhaust, pyro and boost gages, and secondary fuel filters?

 

when i went i had exhaust pyro, boost and intake, they didnt say a thing, i didnt even have to sign anything, my truck was done in 4 days (should only be 8 hours)

they replaced all 8

 

According to my dealer, GM will no longer replace injectors for just smoking. The numbers have to meet their criteria. Even if the injectors are failing, they have to be "defective" not just worn out, which is usually the problem. The fuel pressure is so high, they explained, that they're wearing out in about 50,000 miles. This does not qualify as a defect. Good luck.

 

Dont know that much about diesels yet but learning. How do i know if i have an LB7 or something different?