'Finger Stick' comes complete with COLOR DETAILED wiring instructions! This modification is required on most California and Northeastern emission trucks and some federal emission trucks to stop engine limp and turn off the check engine light due to the lowered back pressure of removing the front pipe. This 'Finger Stick' will help prevent a Service Engine Soon (check engine engine) light from illuminating and will prevent the ECM from displaying DTC codes related to an EGR modification or larger exhaust. We treat all 2006 as a LBZ as far as modifications. The 2006 LLY and LBZ engines are essentially the same when it comes to modifications. This creates some confusion as the 2006 LLY is distinctively different from the 2004.5-2005 LLY. The early 2006 engines were still called LLY and the later 20 'Classic' models became the LBZ. The LB7 was used from 2001 model year until mid 2004 model year. This EGR Override Circuit 'Finger Stick' is For the 2006-2007 GM 2500/3500 LLY & LBZ 6.6L Duramax Diesel Engines (Years: 2006-2007).This circuit modifies the MAF signal to the computer on the LLY and LBZ engines (Not LB7, Not 04.5-05 LLY, Not LMM) to expected levels when the EGR is blocked off, modified or a big free flowing exhaust system (removing the cat) causes the ECM to set an EGR code and display the check engine light / service engine soon. See out other Listings for EGR Blocker Plate / Finger Stick Packages THIS LISTING IS FOR THE EGR CIRCUIT ONLY! The 2006 LLY does not use the same parts as the 2004.5-2005 LLY. The 2004.5 -2005 LLY will use performance products suited for a 2004.5-2005 LLY model only. The following is specifically suited for the 2006-2007(classic) Duramax LLY & LBZ ONLY. 2006-2007 Chevy Duramax LLY / LBZ EGR Code Blocker Finger Stick Signal Modifier

Lly egr blocker plate install