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Our Wildwood, FL techs will confirm the right part for your build before you buy.
Call or Text (352) 722-5295What the accessory sensors do on a 2007.5-2010 Silverado HD
An Insight monitor gets most of its data for free, because the LMM is an OBD-II truck and its controllers broadcast boost, rail pressure, load and transmission temperature to anything plugged into the port. Exhaust gas temperature is not on that list. Nothing in the factory wiring measures it, so the only way onto the screen is a probe you add. That is the EAS EGT kit 98620, Edge's daily driver and tow kit, built around a K-type thermocouple. The EAS pressure sensor 98607 works the same way for pressure, reading 0-100 psi and adding a channel to a display that would otherwise be limited to what the bus hands it. Accessory brackets and wiring for this kind of hardware run near the OBD-II port, which keeps the harness tidy and the sender close to the display.
Why exhaust temperature is worth the trouble on an LMM
The LMM is the first 6.6L Duramax with a diesel oxidation catalyst and a diesel particulate filter, and the controller burns soot out of that filter by commanding late post-injection, which raises exhaust temperature deliberately. Owners of these trucks also know the engine's habit of fuel dilution, where post-injection fuel washes past the rings into the crankcase. GM calls for low-ash CJ-4 oil on this engine because it runs a particulate filter. Exhaust temperature is the reading that puts all of that in front of you instead of leaving it to guesswork, and it is the number worth watching when the truck is loaded.
What we carry
Everything on this page is Edge Products: the EAS EGT kit 98620 in daily driver and tow form, and the EAS pressure sensor 98607 covering 0-100 psi. Both are accessories for an Edge monitor rather than standalone gauges, so plan on a compatible display in the truck. The rest of the parts for this engine live under Duramax.
Fitment notes
Start with the display you own or intend to buy, since these sensors feed a monitor and compatibility is set by that monitor, not by your cab or bed. Watch the 2007 split while you are at it: a 2007 Silverado HD Classic is the older GMT800 body with the LBZ, while the LMM came only in the new GMT900 HD body from mid-2007. An exhaust probe also needs physical access to the exhaust, which is a shop job on some trucks and a driveway job on others. Verify with the fitment checker on the product page.
Frequently asked questions
Do I need a monitor to use the EAS EGT kit?
Yes. These are sensors that feed a display, not gauges that read on their own. Edge's Insight CTS3 84130-3 and the smaller CS2 84030 both cover the LMM, and either gives the kit somewhere to report.
Why is exhaust temperature not already on my Silverado's dash?
GM never offered it. The Driver Information Center handles transmission temperature and the oil-change notification, and LT and LTZ clusters add a voltmeter and oil pressure, but no factory gauge reads exhaust temperature and no factory sensor measures it.
Where do the probe, bracket and wiring end up?
The thermocouple goes into the exhaust, and the K-type probe hardware and small mounting brackets that come with this style of accessory are routed near the OBD-II port where the monitor plugs in. We install these in our Wildwood shop if you would rather not run the wire yourself.
Not sure what fits? Call the shop at the number in the header, or use the fitment checker on any product page. We install everything we sell.