Anyone have a recommendation for an after market TPMS for a 3500? I've looked on ebay and amazon but most are designed for passenger cars, not a HD truck with tire pressures of 80 psi.

 

After some googling, I found this from http://tiresafeguard.com/

Bruce,

You can use our internal TPMS with valve mounted sensors. For 4 tire plus
a spare we can offer you a discount price of $279 (regular $410). You will
likely not need a signal booster. Any questions please call our sales &
tech support at 818-400-9976.

Thank you
Tire-Safeguard

So I'll probably order a set. With my camper, I never detected the low pressure until I started hearing tire noise. Tire was history by then. Replacement tire was about the same price as the TPMS.