i have a 2005, 3500,crew cab with a 6.6duramax.i turn the key on for the glow plugs and no light comes on.all other lights in the truck are working fine.the truck just won't start or turn over.anybody got an idea?

Have you had your batteries tested? Just because they have 12V doesn't mean they can supply the load.

havn't checked batteries yet.will in the morning.i'll get back.i have a appt. with the stealership on thursday.thats if i can get it out of the driveway.

I just had that problem this morning, I hooked up my lift pump to my ignition fuse last week and finally over loaded the circuit, I changed the fuse rewired the lift pump. It started right up. Check ur ignition fuse under the hood, pay attention tho u have 2 ignition fuses check them both, my symptoms where the same as urs. Every worked just no glow plug light or starting

well,i checked the batteries and there o.k.I also changed out both the ignition fuses A and B.Still no luck.Any more ideas.i'll try anything.Thanks for the input guys!

Have you disconnected your batteries recently? You might be caught in a security trap. The security system can get confused and prevent you from starting 'cause it basically thinks you might be trying to steal it. I've read about the problem... though I've not personally dealt with the issue. Might search on "security" to see if you can find the threads and see if those help any.

Good luck!

Disconnected batteries and did not help.Keep giving me ideas please. thanks

I'd still bet its an electrical problem u just gotta figure out where at, u also have an ignition
Relay under the hood with all ur fuses, next to it is an identical relay u got temporarily swith them and try starting it, u also have another ignition fuse in the cab when u open the drivers door, if that don't help read ur owners manual and possibly try pulling the fuse to ur security system. Good luck with that if thayt doesn't work let us know I'll keep trying to throw ideas ur way

well,i checked the batteries and there o.k.I also changed out both the ignition fuses A and B.Still no luck.Any more ideas.i'll try anything.Thanks for the input guys!

Did you have the batteries checked at a store, or did you check them yourself? MANY people have had a problem with only one battery, but that's all it takes. If they are originals, then I'd double check.

Mine did the same thing. My batteries tested ok with my meter at home. Everyone kept telling me it's the battries so I figured they were 4 years old anyways so I bought 2 new ones and she started right up...

Did you check the grounds? That is one of the first places I check

It's in the shop.Still waiting for what they say is broken.They (the stealership)say they also have a 2008 sitting there with the same problem. I hope they find the problem tomarrow.I can already see the hours racking up$. Check back in tomarrow. Thanks for all the input everybody.

I've had batteries that checked out ok. Went to a battery specialist shop and found a cell was out or shorted inside the battery. Replaced the batteries and started right up. Keep us posted on your findings! Good Luck

Try puling the cover off the fuse box. Not the easy one to remove, but the one that requires you to remove the brace between the fender and the firewall. Under that cover there is a big fuse similar to the ones some of the car audio guys use. Check to see if it is blown. It controls the glow plugs. I think it is a 140A fuse or larger.