I got a Valiant from JC Whitney on sale for $39 intending to use it for just the keyless entry but ended up hooking the whole thing up after seeing what it would do. It has function switches for diesels for a 30 second wait to start and longer crank time. I don't use the wait to start because I plug my truck in in the winter, the heaters have never come on even at minus 25°. It also has another remote function to pop the trunk, I hooked mine up to the horn, makes it easy to find your truck or just play with people. Only problem I've had with mine in four years is once when I forgot to plug in, it kept on tiring to start till the batteries were dead, I was too far away to hear it, range 300 ft. Also has anti theft devices so you can leave your truck running without the key, but it can't be driven. Expect at least 8 hours to install it yourself, mostly searching for wires under the dash, there are at least 25 connections to make, I soldered all, but that's my preference. They run about $80 when not on sale, and for all the features you get are an excellent deal, I don't see how they can do it so cheap. I highly recommend it.