Many of the vendors here can provide you a "Finger Stick"-- That is a Chip that fools the system in thinking the EGR is still working. It is wired into the MAF sensor sircuit. I don't know about the heater, but many have deleted it. You might contact Merchant or Fleece --for mor assistance. (vendors here!)
I am moving this to the LBZ section, as it does not fit the criteria of 911. Jerry
Chevy 04.5 LLY, 2X, shell, XDR, MikeL Heavy duty up-grade, 6spd, TransGo, deep pan, de-badged, 65 Gallon replacement Aero tank, LBZ-mp, Kennedy pump, shimmed, Pre-fuel filter, tow mirrors, BU cam, gauges, GPS, Sirius, bags, custom grille, fender vents, HD trans cooler- Curt front hitch, footwell lights, load lights, Studs, head gaskets.