Smoking like crazy and they won't replace them
Tor,
You were lucky man. My late 03 (early 04 model year) LB7 is belching white smoke at idle. Still has plenty of power though. Anyway I had it tested and it didn't fail. And yes it is excessive return rate that triggers the warranty replacement. They gave me a bottle of GM secret diesel sauce but I can't say that it has had any effect on the white smoke after one tank. I just got my AZ registration renewal and it says I'm due for emissions testing. That's going to be interesting. I predict a trip back to the Chevy dealer after leaving the testing place. I guess I'm going to have to escalate up the chain to the regional GM reps. If I end up having to pay is there an after market injector replacement that permanently fixes this?
-Ken
2004 Silverado 2500: HD D/A LB7 4X4, SnugTop XV, Bilsteins, AEM Brute Force HD intake, Banks Monster exhaust, Hypertech
1981 Airstream Excella 280 Turbo Diesel (Isuzu 6BD1T/Chevy P30) Motorhome
2010 VW Golf TDI