2008 silverado 3500hd dsl

Trying to wire up remote start with tach sense on 08 silverado diesel. I have checked the 08 silverado posted here earlier but the diesel seems to have different wires. Any help in getting a wiring diagram or at least help on the "wait to start" wire -- tach wire?

this vehicle does not really have a "tach" wire that you can tie into. no diesel actually has a real tach wire by definition because there is no ignition system. on some of the older model diesel trucks though, there are certain wires you can tie into and program the unit to. this truck however is different. your going to have to use a different mode of engine monitoring, like "voltage sensing". for the wait to start light, use a DEI 528t pulse timer. they are completely adjustable and work great.

alot of starter have a wait to start timer that is programable

and i though the newer gms did need any glowplug run time anymore

that they heated as quick as you turned the key on

and last time i checked almost all gm have factory antigrind

so you just preset the crank time

The glow plugs fire in a nano second. NO wait to start needed.

The tach can be found at the large harness from a blue/gray plug coming from drivers side top of engine.

lt.blue/black. it's a 2 cyl. reading.