Electrical Issues on 2007 Silverado 1500 (New Body Style)

[Michael Sauer]

Hi guys,

 

As the title states I'm having electrical issues with my '07 Silverado. I have 92,000 clocked on the odo and haven't had a single mechanical issue with it since I've had (around 13,000 Mi Odo). About 20,000 Mi ago or so my truck started it exhibiting some weird electrical quirks. Such as Flickering dash lights (Tach, Sped, AC, etc.), failure of drivers side low beam, a rough shift from 1st into 2nd gear accompanied by a complete restart of all electronics in the truck, and occasional failure to start. This was all intermittent and could months without the issue presenting itself or it could go months plaguing the truck. I have taken it to multiple shops to have work done in an attempt to sort out what could be wrong. I have replaced The Negative & Positive Battery Cables and terminals of the battery multiple times. I have replaced the Alternator and Battery. I have traced a lot of common grounding cables and replaced them. I just replaced the battery a month and this morning went to start the Truck and it wouldn't go. Three hours later, it started no problem. Just looking for some guidance if anyone at all would be willing to help me out would be greatly appreciated!

[riverbanks]

How's the relay center look?pull a fuse or two,clean?,and when you said it wouldn't go?no dash lights?lights,but no crank?

[STEALTH_GRAY_SIERRA]

I recently had a similar issues with 07' sierra with 97,000 miles. I would have intermittent power and would get all sorts of weird issues with the locks toggling on and off without hitting any switches. Also had codes for ABS, stabilitrack would go on and off, etc. I would recommend checking / changing the 175A mega fuse. A lot of the electrical systems on these trucks run on a very specific voltage and a small amount of additional resistance (corrosion on fuse) can give you all sorts of weird symptoms. My issues were resolved by changing the + battery cable ($50), replacing the mega fuse ($8), and cleaning all of the connections in the fuse block (free!). Hope this helps out and good luck.