guy's i have a question. i have an 06 2500 gmc,with a hypertech tuner, 4.5 turbo back exhaust & airraid cold air intake. After 60000 miles my check engine light started coming on. It is throwing a p403 code i was told it was the egr valve . replaced it but still get the code. When I change fuel filter & clean the air filter I can reset it & it stays off for around 2500 miles . Theres got to be something I can do about it . please let me know something other than i have a piece of !!!!

 

If you are meaing P0403 rather than p403 it is the EGR recirrculation control circuit.

P0403 is an indication of a problem with the EGR Servo motor electronics and is
unrelated to the Finger Stick which will neither cause nor cure this code.

This is directly from Kennedy Diesel website for EGR blocker plate/fingerstick kit. Your kit will not clear this code. You need to get it fixed/replaced or if you have/get EFI Live you can reprogram so that computer ignores these codes.

This happened to my 06LLY last month, was still under warranty and dealership replaced EGR valve motor/solenoid after their "cleaning/cycling" repair did not work.

It has abolutely nothing to do with the exhaust mods, but that is an easy target. Mine was gummed up with carbon/soot deposits that result from the design of recirculating exhaust gases for cleaner emissions. If you are under warranty, tell your dealer to stick it and go to anothe GM shop. I am not sure on this, but the EGR motor/solenoid is part of the Dmax engine and is likely under the 100k mile warranty.

 

Welcome to the site Mellis. Moved your post out here so the experts would find it. be sure to fill in your signature with the truck details so they can help ya better.

 

thanks for the info,i had 2 dealers void the warranty because of the minor mods. So I replaced the egr valve. Is the egr valve motor/solenoid on the egr valve & can this cause problem with something else later?

 

you should just block the egr and find somebody to block the code for you, egr is no bueno

 

how do you block the code? it is starting to **** me off

 

So would this be correct in saing that on my 07 chevy lbz that it may just need to be cleaned then put the fingerstick and blocker kit on so this code may not come back on?I only get this code once or twice a month, also the truck only has 32000 miles on it.