symptoms of dead battery 07 Sierra w/t electrical nightmare

[Katy Lackey]

So many strange electrical issues that have me at a standstill .. tried multiple fixes for the intermittent no start issue . Leaking back window is a mystery and not something I feel is due to anything I've done or not done. . Yet no fix for that unless I'm paying for it ...the mother recent attempt to fix the random starting issue was the 175 amp mega fuse ..I'll post how that goes after replacing and running a while.  Any other fixes or help toward getting thru the electrical nightmare are appreciated!  

[vinemann12]

Many wierd electrical issues can be caused by poor grounds for engine, chassis and Neg-battery cable..

Batteries that have low cell voltage may be another possible cause for strange issues..

VOM meter is your best source for detecting and fixing..

You may want to start with cleaning "all" grounds starting in engine compartment and under dash..

If your truck is in rain belt,, green connections may be easy to see..

 

If all fails,, I have included Fuse cheet sheet...

 

Cheers---K

 

[aseibel]

passlock causes all kinds of issues when its not working properly. Try resetting it and see if you can start the vehicle. I had a loose wire giving me headaches until the mechanic finally found it.

 

https://repairpal.com/gm-passlock-anti-theft-systems

[Swimmer8366]

Start with checking battery than go tto ground wires if battery is good.

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[carnau]

19 hours ago, Swimmer8366 said:

Start with checking battery than go tto ground wires if battery is good.

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These trucks are notorious for bad negative ground cables. The next time it will not start wiggle the ground cable at the negative battery. I can't tell you how many of these I have replaced. Hope this helps. 

[Swimmer8366]

These trucks are notorious for bad negative ground cables. The next time it will not start wiggle the ground cable at the negative battery. I can't tell you how many of these I have replaced. Hope this helps. 

I rerouted mine put a bigger ground on it.

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[carnau]

7 hours ago, Swimmer8366 said:

I rerouted mine put a bigger ground on it.

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I mean for 50$ I would change it just for the fact that they are always an issue and this new revised cable fixes the crimp. http://amzn.to/2zRDIKm

[Swimmer8366]

I mean for 50$ I would change it just for the fact that they are always an issue and this new revised cable fixes the crimp. http://amzn.to/2zRDIKm

Not aware of this....

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[carnau]

15 minutes ago, Swimmer8366 said:

Not aware of this....

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I am not talking about your cable. It is probably better than this cable lol.

[Swimmer8366]

I didn't know they revised it.... I just said this is stupid **** this. Lol

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