Any mechanics???

[kschweer]

I consider myself fairly mechanically inclined and do most work on my own vehicles but not trained or anything. I have run into an issue with my truck and after a day of working on it, googling, youtubing, and basically anything I can think of I'm at a loss. So here's the story.

The other day when it was nice out I left the windows open in my truck to air it out a bit. I went to close all the windows in the truck and in a rush left the ingnition on (truck not started just ignition in the on position). About 5 hours later I noticed my head lights on and realized my dumb mistake. Tried to jump the truck a few times to no avail. Went and had my battery tested to be told it was bad. Bought a brand new battery. Get home and installed it and the truck still will not start. Tested the battery and all is good with it. I get lights on the dash, radio works, front windows work (not rear), locks do not work, key fob does not work, no interior lights. I have tried everything I can think of more than once. Anyone have any ideas?

Truck is a 2007 Chevy Silverado 1500 LTZ with the 5.3l v8.

Thanks in advance!
-Kevin

 

[kschweer]

I should also mention the truck is not even trying to crank. When I turn the key I hear the fuel pump engage and that's it.

 

[SeahorseKeeper]

This might sound silly, but try starting it with your foot on the brake and triple check it is in park. I went through the same thing recently with my car and that is how I got it to start.


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[kschweer]

This might sound silly, but try starting it with your foot on the brake and triple check it is in park. I went through the same thing recently with my car and that is how I got it to start.


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Thanks krista! At this point I'm willing to give anything a shot no matter how silly it sounds. I'll give it a try when I get home.

 

[art13]

If that doesn't work i would start checking fuses.

 

[Bad Fish]

Do you have an auto start?

 

[Bad Fish]

You might and not know it and that could be the problem

 

[redfishbluefish]

I'd give Krista's suggestion a shot first.

If that doesn't work, I'm no expert, but with "modern" cars with electronic ignition, the only thing that I could see happening is electronic fuel pump burning up from constantly running too long (if it's not controlled by the PCM)....but that would be like a long drive anyway.

Although I've never heard of leaving ignition on hurting the PCM, the first thing I'd look at is the PCM. I'd begin with the fuse that supplies the PCM. From there you're on your own, because that overpriced black box is a mystery to me.

 

[kschweer]

If that doesn't work i would start checking fuses.

All fuses checked.

Do you have an auto start?

It does have a factory auto start.

I'd give Krista's suggestion a shot first.

If that doesn't work, I'm no expert, but with "modern" cars with electronic ignition, the only thing that I could see happening is electronic fuel pump burning up from constantly running too long (if it's not controlled by the PCM)....but that would be like a long drive anyway.

Although I've never heard of leaving ignition on hurting the PCM, the first thing I'd look at is the PCM. I'd begin with the fuse that supplies the PCM. From there you're on your own, because that overpriced black box is a mystery to me.

Thanks Paul I'll check it out. Trying to coordinate with my buddy so he can throw his scan tool on it.

 

[Bad Fish]

I had my auto start act up. I pulled into the gas station to fill up and my car would not start. I had it removed and that solved the problem

 

[redfishbluefish]

All fuses checked.

I don't know if they call it a TIPM (Totally Integrated Power Module) in Chevy's, but believe Chevy's have something similar....close to the battery...that have a bunch of fuses and fusable links within. Check that as well. In Chryslers the TIPM's are a piece of crap....putting delicate electronics in a box that is not waterproof. I was just in a Dodge Ram 1500's TIPM yesterday.

 

[kschweer]

I don't know if they call it a TIPM (Totally Integrated Power Module) in Chevy's, but believe Chevy's have something similar....close to the battery...that have a bunch of fuses and fusable links within. Check that as well. In Chryslers the TIPM's are a piece of crap....putting delicate electronics in a box that is not waterproof. I was just in a Dodge Ram 1500's TIPM yesterday.

There's what the call a "mega fuse" in that location. I'll be sure to check into that as well.

 

[Edwardw771]

@Daniel is the man when it goes to fixing cars

 

[Raffle King]

Yeah give Dan a call he will tell u what to do

 

[Paul B]

I am not a mechanic any longer but was one for General Motors many moons ago. That sounds like a loose, dirty or bad battery cable as you are getting very high resistance from the battery. A tripped breaker or blown fuse will get no sound from the fuel pump and no windows working, not just partially working. Fuses are either good or no good, there is no in between. I feel either your battery cable is loose or dirty and it is a very common problem. Try jumping the truck from where your battery cables are connect to on their other end, not the battery. The positive may be on the starter and the negative is on the chassis someplace. First do the simple things like cleaning the cables on the battery and at their other end. I would turn on the headlights and move around the attery cables at the battery and at their other end. If the lights come on, or blink, that is your problem.

 

[art13]

Yes, fuses can't be halfway working, but theres a lot of fuses, so half the truck could work and half could be out. When there's power going through and he's getting certain things to work, i suggested fuses as it's easy to check and could very well be the issue.

 

[Paul B]

I said battery cable because it seems he can get low current things to work and the front windows, not the rear. I don't think there is one fuse for the rear windows that would also control the ignition, locks, key fob etc. Of course you would have to see the wiring diagram for that but the battery cable is the first and easiest thing to check. Remember, it also doesn't start and that is a different fuse than the windows. There are some main fuses and relays in there but those systems should be on a different relay. I would assume he could have shorted something out and blew a variety of fuses as that is a possibility. But I would check the battery cable first as that is the start of the power circuit then go on to different systems. If he had a voltmeter and knew what to look for, he could find that problem in 2 minutes.

 

[art13]

Yup, battery cable can be an issue, and everything is wired up differently, so like you said, short of having the diagram, it's a possibility. What i think it's going to come down to though is the PCM or BCM after talking to kevin about this one a bit more, unless he accidentally activated the anti theft system.

 

[kschweer]

Thanks for all the advice everyone. I have tried everything above with no luck. It's looking like a bcm issue. It's either going to need to be reprogrammed or replaced. Before I tow it into the shop my Friend is going to bring over his scan tool and Foubke check things incase I am missing something.

 

[Chrisgarrick]

I just read this. I would use the scan tool and reset any codes. Then try again to start and then again check codes. .