You can clear the OHD & dinger by hitting the button each time. Gets to be a PITA on long trips every 20 miles.
I got mine to go away with the Pressure SIM. Look in the DIY link in my signature for details on how to build one.
Yes a Smarty or XRT will also do the job.
W/O one of them you should also have the O2 sensors installed. Only fool the EGT probes & PS.
__________________
Tom
2008 QC-LB,2500,4X4,White/Kaki,Big-Horn,3.73 Auto,315/70/17 tires, MyGig Nav unit, K&N Air Filter, no baffle,DPF quit working
, Smarty & PMT, Mag-Hytec Pan & Diff covers.
Toms smarty Journal - UPDATES on Page 1 ..... DIY Deletes How-To