I was going to pull mine off and clean, I have 55K on the car now. But, as part of GM's efforts to fix the problems of the P11DC due to the screwed up recall efforts, they put a brand new EGR valve on.From a historical maintenance perspective I'm kind of interested in the data on your vehicle i.e. do you drive mostly city or high way miles and about what % city vs hwy, do you buy diesel mostly from high vol truck stops, do you use any diesel fuel additives?
Just wondering whether its the city drivers that are having the most problems with the EGR? My driving is mostly hwy at 60-70 mph at a rate of 120 miles a
day due to work, with only a few local miles on weekends. No problems yet with the EGR and there is 57K miles on the clock. Trying to decide whether I should pull the EGR and clean so that I maintain my goal of the car being available 100% of the time 24/7 with out any unplanned down time except for scheduled "routine" maintenance.
Would consider a short posting of the steps involved for pulling the EGR and any before and after pictures you might have of the cleaning?
It could not hurt it to pull it off and give it a good cleaning.