hi i have a 2005 gmc yukon denali.Car was running perfect now it hesitates and shakes.No codes no check engine light.Ones give a code for rich on bank 1 or 2.Last year i done my blocks and replace the headers and corsa exhaust plus air intake filter.After i took a trip to florida car start loosing power and rpms whent lower like 500 or sometimes below. I try soo many diferrent mechanics.Please help anyone! Realy appreciate Thank You

Asked by Jun 24, 2016 at 05:37 PM about the 2005 GMC Yukon Denali AWD

Question type: Maintenance & Repair

hi
i have a 2005 gmc yukon denali.Car was running perfect now it hesitates
and shakes.No codes no check engine light.Ones give a code for rich on
bank 1 or 2.Last year i done my blocks and replace the headers and corsa
exhaust plus air intake filter.After i took a trip to florida car start loosing
power and rpms whent lower like 500 or sometimes below.
I try soo many diferrent mechanics.Please help anyone!

Realy appreciate

Thank You

1 Answer

13,145

It has codes! scan it again these engine are always doing something.."No codes no check engine light.Ones give a code for rich on bank 1 or 2."? seems like a code what ever, The Check engine light doesn't have to be ON read the Data off the computer and its and easy fix. Check the long term and short term /fuel trims and throttle body. You REALLY, haven't found a mechanic yet. This stuff is so easy. Regards

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