mark97213

Thanks but it's kind of tough to pin point an applicable diagram. As this could a sensor a light, etc. Not sure which way to go in a diagram.

No, horn's wired up on a different loom. But thank you.

Greetings all. I'm in the process of getting my recovered 03 Silverado, all its front wiring completed, but there are a couple wires that look like they went to a sensor or similar. It is factory wiring, harnessed to toward the front to the truck on the right side. The two wires are 18-gauge, one dark, one light green with a black stripe. Does this look familiar to anyone?

Great to know. Thank you for checking into that for me.

I got it up and running. Examining the master harness in the console, one of the pinouts would pushed out far enough when both sides are connected, which removed a single wires connection.

Yes, the radio that was in it was GM Part No. 10359577 and the one I replaced it with was the same part no. just in much better condition. My hope is that he had the wrong radio in it? Thank you for your help.

Greetings everyone. I would greatly appreciate some advice on this one. I bought a 2005 Silverado that has a RDS Radio Changer with Bose amp in it but there is no sound. All fuses are good, no sound, no OnStar and no chimes. I was told it could be the radio or the amp so I installed an excellent condition radio cd changer OEM radio. Still, no sound. Was then told it HAS to be the amp. Sent the AMP into United radio, had it rebuilt but still, no sound. All factory wiring appears correct from what I can tell but is it possible the Radio CD Changer is not a BOSE capable radio? I was told all cd changers for this year were the same. Is this true?

Greetings all. Might any of you K5 owners out there have a 1981 K5? My fuse box is completely unreadable, and all the plugs were removed. Might anyone that owns a 81 be able to take a picture of theirs for me? Apparently the 81 is nearly a one off where so many things are unique to the 81 only.

Gotcha. Thanks for all your help.

Yeah, there were some aftermarket gauges in it along with a mechanical oil pressure one but I'm restoring it back to factory. Temp is easy indeed but I'm not positive which color goes to it. If you saw this mess of wiring, you'd be amazed what he was trying to do and it's beyond me. Anyway pretty sure the temp gauge is an orange wire and I'll have to trace it from the cluster I think. As far as the volts, will the cluster just pick that up from the Alt or HEI ?

Thank you for that. Yeah, I've seen that schematic before but it's too generic for the 81 blazer... I think. On the switch, the one I pictured, may actually not be the one for the oil pressure switch. I'm operating completely in the dark on this. I search for a new oil pressure switch and it showed a single blade and a two blade. I bought the two blade but now that I think about it, it may be wrong after all. But it is factory so it must go somewhere. It's frustrating working on a swapped engine. But like you said, it really should only be a single wire to operate the gauge. I also need to figure out the Temp, which I know is a single wire, and the voltage. I'm far from a electrical pro but have some general knowledge about them.

Yes, I've looked for a schematic but I've yet to find one for that specific year Blazer. Yes sir, I agree . . . GM put it there for a reason. I'm hoping it's simply a ground as there is no part of that wire in the loom anywhere. It's as though he ripped it all the way out. The big block is a 74.

I posted an electrical question on a forum but no one seems to know. I have an 1981 K5 Blazer that the previous owner put a big block in. I'm trying to get the factory gauges to work but I am having a tough time with the Oil pressure sending unit wiring. I found the oil pressure plug on top of the bell housing and pulled it out ready to plug into a new oil pressure switch when I notice the middle wire is cut and missing (see photo) and am wondering, it's just a two prong plug but there are three wires coming from the connection. Can someone tell me what this middle wire is too.... is it just a ground? Does it need all three wires connected to make the gauge work?

I bought my project big block 454 Blazer but the previous owner made a mess of the engine bay wiring. I'm attempting to get the original gauge cluster working but have run into a couple problems. I found this Oil Plug connector down by the bell housing and I believe all I need to get the oil pressure reading is to hook this up to a new sensor. This is a two prong boot connector but has three wires coming from it. The previous owner cut the middle wire (from somewhere) and I can't find any lead that would match up to it. Does anyone know where this middle lead is supposed to go?

Thank you sir. Tim posted a link from a source in the forum that I hope will be a go. I ordered it but I fear I may get an e mail stating that "part is out of stock." Hope I'm wrong.