06-07 Chevy Duramax 6.6L Diesel EGR Block Off Plate
The Blocker Plate is just as the name implies. It is an aftermarket-machined plate made to slide into the EGR exhaust connection flange to block off the flow of emission gases to the EGR. Some believe that this results in an internally cleaner engine due to no longer recirculating sooted exhaust gases through the engine intake to be reused during the combustion process. Some forum members report the following additional benefits when the plate is installed: A slight increase in MPGs, a slight decrease in EGT temperatures, more engine power, quicker turbo spool-up and a slightly quieter running engine. A few members have also noted just the opposite.
Will installing the blocker plate cause DTC codes and a Service Engine Soon light?
Installing a Blocker Plate will cause the PCM to display EGR related DTC error codes due to the lack of airflow to the EGR. Forum members report that on vehicles with Federal Emission standards the SES light usually will not illuminate. On vehicles having CA and Northeast emission standards chances are the SES light will illuminate. The Override Circuit Stick can be installed to prevent DTCs and SES illumination. It is still unknown as to exactly how / if the ECM compensates when the plate is installed without the Stick.
The Override Circuit is available thru us also.
Any installation you make is done at your own risk. Any manufacturer can not and will not be responsible for any damages, real or perceived, to you, your truck, or your marital life in whole or in part. Same goes for these installation directions. I did this as a favor to the forum members to save them some reading time on an interesting subject. Read all these directions before installing. Ask questions first, install second.