My local install shop has had my truck for a coupla days doing some light installs. Went to pull it out and it won't start. No crank, no whirring of the fuel pump, no nothing. Headlights bright. The Nav/Stereo lights up, but NO SOUND. Cursory check shows no obvious blown fuses. Can't even do an On-Star troubleshoot because the stereo has no audio. :( Any ideas?

Sounds like a passkey thing to me. When I put the non-programmed key in my truck, it did the same thing. No crank, no fuel pump, and only some of the idiot lights on the dash (if I remember correctly). I don't know the learn procedure for these keys but my guess is you're going to need a tech-II. Maybe pull the - off the battery for 20 mintues and reset the computer, then try it again. Good luck, let us know what happens.

It just got towed to the dealer. The GM Roadside guys were very quick; only about a 15 minute wait. I hope to hear something back in a few hours.

Wow that stinks! Let us know what they come up with. What ever it is it's killing everything like a security thing.

Scan/clear the codes.

Something like this happened to Casper. When I bought it, they had put some lame-ass aftermarket anti-theft device in it and forgot to remove it. When Mike did the trans in the truck, the truck would not start afterwards. I looked under the dash and saw it was intercepting the yellow wire.

Not an LMM, but this applies to 100% of cars/trucks with that dumb anti-theft thing that dealers install.

Well, it seems it was the bottom connector on the ECM was loose. Dunno how that happened. Dealer said they could not bill GM for it, but would cover it "in~house" as a courtesy. After leaving, I discovered it still has no sound; stereo, chimes, Onstar etc, so it's going back on Monday.

yea with out the pac03 adapter in there you will loose all of those fetures

yea with out the pac03 adapter in there you will loose all of those fetures

You lost me. What are you talking about?

didnt you say you where doing an aftermarket stero ? or did i missunderstand. bascily in our trucks all of the turn signal door chime key chim back up alarms and a few other things are all tied into the stero harness. so if you have it removed those options will not work unless u ether put the fasctory stereo in or use a pac03 bose or non bose adapter for your aftermarket stero system. to retain theese items as well as onstar

didnt you say you where doing an aftermarket stero ? or did i missunderstand. bascily in our trucks all of the turn signal door chime key chim back up alarms and a few other things are all tied into the stero harness. so if you have it removed those options will not work unless u ether put the fasctory stereo in or use a pac03 bose or non bose adapter for your aftermarket stero system. to retain theese items as well as onstar

Nope factory stereo w/Nav and RES.

Did they tell you that those features were in op before you took it..??..

Did they tell you that those features were in op before you took it..??..

Nope. Don't think they knew.

Soo, they now say the truck cannot communicate with the amp, but they don't know why. Any ideas?

what exactley where you having done to the truck when all of this started happening? what have they done since to the truck ?

what exactley where you having done to the truck when all of this started happening? what have they done since to the truck ?

Wiring up the snow plow and salt spreader. Nothing that hasn't been done to my last four trucks.

well ether fuse . amp blew wich if it has no power will cause you to loose those accsrys or they cut one of the lan wires on acident the yellow lan wires look like normal wires. theese are just gueses on my part.

well ether fuse . amp blew wich if it has no power will cause you to loose those accsrys or they cut one of the lan wires on acident the yellow lan wires look like normal wires. theese are just gueses on my part.

We checked the fuses first thing. The installer swears they tapped no wires and everything was only a hot or ground either at the battery or the inside fuse box. I guess we'll see on Tuesday. A little suspicious that it happened while in the shop.

yea i know a couplet guys that have cut lan wires on the new trucks acidentley. and messed up a whole lot. hope it goes well let us no what ya find out

We checked the fuses first thing. The installer swears they tapped no wires and everything was only a hot or ground either at the battery or the inside fuse box. I guess we'll see on Tuesday. A little suspicious that it happened while in the shop.
So you got to let us know whats going on when you find out.

So you got to let us know whats going on when you find out.

They replaced the amp yesterday and it didn't help, so they ordered a whole new NAV system. That should be overnighted and installed today. We'll see...

They replaced the amp yesterday and it didn't help, so they ordered a whole new NAV system. That should be overnighted and installed today. We'll see...
Who's doing the install? Or the repairs now?

Who's doing the install? Or the repairs now?

It's at the dealership.

It's at the dealership.
But the dealer didn't do the install of the blade and spreader correct?

But the dealer didn't do the install of the blade and spreader correct?

That's right.

Now I'm wondering if your installers disconnected the battery for the entire install. You now how easy it is to short something out if you don't disconnect.

Ok; here's the latest.They replaced the Nav system too and still no dice or actually, no audio. Then they took my same Nav that won't work in my truck, put it in another truck and it works. There is something either telling or preventing the Nav/radio from sending the required 12V to the amp. Seems to be a communications issue. I'm thinking now it's maybe something as simple as a bent pin on the harness they say they found loose. The next step is to have a GM engineer come in and look at it since they are out of ideas. If that happens, they will likely require all of the lights, snow plow and salt spreader wiring be removed and the truck returned to stock. I'm ok with that (and the related expense) if that winds up being the problem. But what if it's a GM issue? Who's gonna pay that labor to remove it all and reinstall it?? No one will answer that one.

Remember that little work order you signed when you brought the truck to the dealer? Thats a contract, you got to know if they want to put the truck back stock and if they find anything, you loose. How well do you know these people? Can you trust them? I am not trying to alarm you but please be very cautious. I work very hard for my money! I'm sure you do too.

I concur with the members that have said the plow installer may have accidentally cut a LAN wire, or they may have even done something as simple a messing up a ground. Did they run the control box into the cab? If so, how? How is it hooked into the truck's electrical system?

Anyone know where I can get a crash-course in how the new -900 electrical systems work?

Oh and about that nut I got one this morning, just lucky I guess.

I concur with the members that have said the plow installer may have accidentally cut a LAN wire, or they may have even done something as simple a messing up a ground. Did they run the control box into the cab? If so, how? How is it hooked into the truck's electrical system?

Anyone know where I can get a crash-course in how the new -900 electrical systems work?

The control box is mounted in the console. The amp is underneath. Everything was pulled and all wires traced back. All aftermarket equipment was disconnedcted at the source; the battery. Everything was run and fused at the aux battery; nothing went to the factory fuse box. No factory harness was tapped or touched as far as I know. The installer came out to the dealership last monday and showed them exactly what they did. I've got a pretty good relationship with the dealer. I've bought a lot of trucks from them over the years. The shop that did the install has done the same install on my '06, '05, '04 and '01 2500HD w/o incident. They have a great relationship with the same dealership and buy several vehicles a year from them.

Thats good news on that. Hope they get you fixed with out any money out of your pocket. Would love to hear what they find,

yea it has to be amp issue because basicly if the amp dosent go on there will be no sound from any thing .this is just a sugjestion but you could try geting a pac03 module plug it in and you should get sound if no sound its going to be somwhere between tht and the amp

Anyone know where I can get a crash-course in how the new -900 electrical systems work?

What would you like to know? GM-LAN? Electrical architecture? Please advise.

Ok, I just got my truck back. It seems that when the truck was Assembled someone ran one of the screws holding the RSE up through a wire harness causing a short. The tech found it by accident. GM covered the repair and I am happy. Who woulda thought...

Brian
Sent from my iPhone

Good news, Bad news. Thats frigging great no cost to you and you still got all your equipment on the truck. Bad news, the grief and down time. Good out weighs the bad here.

I would have to agree that the good outweighs the bad...at leas there wasn't any addiitonal costs..