CadillacEscalade 2003 base 6.0l cheap= runs good (NO Reserve)

2003 Cadillac Escalade WOOD GRIN Description

I started to custom the escalade.. never finshed.=229546 miles runs strong= the other owner before me said they rebuilt the engine I don't know that so I wont say so-BAD- CHECK ENGINE LIGHT IS ON: cause the o2 sensor is out r reading wrong cause the exhaust been moveddriver seat heater doesn't workNO RADIOinterior pieces not put back-onthe rear door handle been moved not done yet= doesn't come with kit- new brake linesnew water pumpnew brake padsnew stabilizer barsnew hubnew battery all the interior pieces and the other side part body- is in the back. and the back 3rd seatsthe drive side seat is the only one ripped- if theres other issues I don't know them your more then welcome to look at- call the number on the back in the pictures 2703228995
I WILL SHIP ANYWHERE BUT YOU HAVE TO PAY FOR THE SHIPPING CALL TO WORK THAT OUT
new issue has started i dont know whats making it do it.. but when driving it loose power message pop up reduced engine power..only does it it on slow take offs?
but it idle forever no problem even with that showing?> think its something on tcl? like wheel spinning faster then overs