Does cranking\starting with the glow plug light on hurt anything?

I don't think it will, I know that I have checked two different powerstrokes and they both start with the glow plugs on. The only problem I could see with it would be lowered battery voltage and slower cranking. I know that my 95 suburban starts much better with them on if the temp is down just a little. But this is just my opinion and what I have found out.

No it doesn't hurt, I do it all the time and my truck is a 95 with the same set of GP.

Beside in winter the glowplugs do a sequence in a cold start after the motor is running:exactly: .

Daniel.

Thanks for the info guys.The reason I was wondering is because I installed a remote starter on my truck and it does not wait for the light to go out before starting.Thanks again!

It's better to wait because it makes starting easier. When it's cold, it can be worthwhile to wait for the second glow cycle to finish.

I have a remote starter on my 6.5. You can install a relay to hold out the start signal to the remote starter until after the glow plugs go out. Unfortunately, I didn't install mine, so I can't give you specifics...but a good installer could probably tell you. ( I suppose it also depends on the model of starter you have....)

I wait, even in summer, even when warm. Figure it can't hurt to not run the glows and starter at the same time. Will it hurt to run the starter and glows together? Probably not, I guess I'm just not in that big a hurry and its become habit. It actually is pretty funny when I drive my wife's car and she asks me what I'm waiting for after turning the key one click....

Cranking the engine while the glo-plugs are "on" slows the heating process. The purpose of the plugs is to heat the air and the prechamber. when cold, cranking pressure/air temperature is lower, hence the need for the glo-plugs. The heat of compression is absorbed by the cold parts.

The optimum way to start the engine is to wait for the glo-plug cycle to "turn off" and then crank the engine. The old trucks had a "wait" light, don't know about the newer models.