The Edge Insight that I use is an electronic monitor only. It plugs into the OBD port and accesses the stock sensors. There is a better option out there now, the ScanGauge2. That can monitor many more parameters than the Insight can. I agree with removing the bullydog. I suggest leaving that on a shelf somewhere, or better yet, list it on e-bay and make something out of it.
The most critical 2 gauges are ECT and EOT, followed by trans temp and EGT for towing.
Do you work on your own truck or do you take it to a mechanic?
The BPD EGR cooler is THE BEST egr cooler on the market, period. If you want/need to keep the EGR cooler, it is the only way to go.
The BPD oil cooling system, if you can afford the initial cost, is an awesome addition to any truck. Once installed, you will never have another oil cooler/egr cooler failure, you will have better than stock oil filtration, better oil cooling and larger oil capacity. I have this system and unlike most upgrades, this one does not have a downside. It is better all the way around.
If you would like to learn more about this engine, how it is all put together, what the parts are called and their locations, there is a "coffeetable book" series about it. I have linked them below:
, the beginning
, changes made to the engine from 2003 year
, more changes that were made. The last of the book series.
Then, when you have some spare time and would like to read up on some things that should be part of your maintenance, check out the articles at the diesel technician society website. DTS Articles