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Chevy Silverado and GMC Sierra Trailer and Towing Questions

195 messages,  Last post on Nov 29, 2009 at 6:12 AM

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What is this discussion about? Chevrolet Silverado 1500, Chevrolet Silverado 1500 Classic, Chevrolet Silverado 2500, Chevrolet Silverado 3500, GMC Sierra 1500, GMC Sierra 2500, GMC Sierra 3500, Towing, Truck


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#3 of 195
Re: tow package wiring trouble [gmctruck] by swift1069
Jan 05, 2007 (10:05 pm)
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Replying to: gmctruck (Jan 05, 2007 9:59 pm)

The wiring in the truck came from factory and was working perfect up to a month ago... I've hooked the trailer up the my other truck and it works perfect no problems and I've tested the plug on the 04 with the problems and the running light wire has a constant power to it with everything off in the truck.. I pulled the fuse for the wire and the power is gone. I replaced the fuse and still have the same problem...
#4 of 195
Re: tow package wiring trouble [swift1069] by gmctruck
Jan 05, 2007 (10:33 pm)
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Replying to: swift1069 (Jan 05, 2007 10:05 pm)

The fuse only protects the circuit from excess current flowing through the wire and will open if the specified current rating limit is exceeded. You could still have a bad connection in the factory wiring or the wiring harness could have been pinched or damaged. Double check the ground wire connections to the chassis for loose connections or corrosion. Which fuse are you pulling that kills power to the wire? What other things does that fuse or circuit feed?
#5 of 195
Re: tow package wiring trouble [gmctruck] by swift1069
Jan 06, 2007 (8:32 pm)
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Replying to: gmctruck (Jan 05, 2007 10:33 pm)

I am pulling the fuse for the running lights to the tow package wire. From what the book says it controls the left blinker on the truck too. But I am not having any lights on the truck staying on or even any problems with the lights on the truck.. I am sure it's something to do with the running lights wire on the tow package harness. Today I am the left brake light stopped working on the trailer too, and the other problem is still continueing. So I connect my second truck to the trailer today and everything is still working perfect on that truck. So I'm thinking the only thing I can do is to take it to a shop and have the wiring tested and maybe replaced..
#6 of 195
To fuse or not to fuse, that is the question by 04cad
Jan 17, 2007 (11:13 am)
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Hi, I have a 2006 Silverado and have just installed the trailer brake wiring harness and my electric brake controller. My question is: when is it necessary to install the included fuse? I had been told on earlier Silverados that the fuse did not need to be installed. The tag on the pigtail makes it as clear as mud. I don't presently have an auxiliary battery, but what if I add one such as on a battery mounted on a trailer for a winch? Thanks
#7 of 195
Re: To fuse or not to fuse, that is the question [04cad] by gbrewer
Jan 17, 2007 (5:16 pm)
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Replying to: 04cad (Jan 17, 2007 11:13 am)

I have a 03 2500HD to tow my 5th wheel. When I installed the break controler, I did not instal a fuse. Been towing for almost 3 years without any problems.
#8 of 195
Re: To fuse or not to fuse, that is the question [gbrewer] by ahoron
Jan 24, 2007 (10:21 pm)
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Replying to: gbrewer (Jan 17, 2007 5:16 pm)

I have a 2002 no fuse no problem.
#9 of 195
trailer braker wiring harness by aboo155
May 05, 2007 (7:53 am)
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I have a 2001 silverado with the tow package. supposedly that has an electric brake wiring harness behind the instrument panel. does anyone know where this is?
#10 of 195
Trailer connector fuse? by rsworden
Mar 25, 2007 (1:16 pm)
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#11 of 195
Trailer connector fuse? by rsworden
Feb 04, 2007 (2:22 pm)
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2004 Silverado with factory tow package, 7-pin connector. The 12v pin is not supplying any power. I'm pretty sure it worked before, charging up my trailer battery. All other pins work fine. I imagine it's protected by a fuse, so that's what I'd check first. But none of the fuse descriptions in the manual or in the fuse boxes seem to apply. I've pulled all the high-amp fuses and all look good. Is there such a fuse?
 
If not, what else should I check? The connector into the "fuse box" (really a connector box) under the steering column seems tight. If I knew which lead should be hot, I could check for 12v there.
 
Any other connectors along the route to the bumper that I should check?
 
Thanks.
#12 of 195
Re: Trailer connector fuse? [rsworden] by rsworden
Feb 04, 2007 (4:10 pm)
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Replying to: rsworden (Feb 04, 2007 2:22 pm)

I solved the problem - posting it here in case it can help someone else. A friend of mine was pretty sure there was a 40-amp fuse, because he installed it with the tow package on his 2002. Another online forum mentioned a fuse in the location Stud 1. In my case, there was a plastic filler plug in Stud 1, not a fuse. Plugged in a 40-amp fuse, and now I have 12v on the correct pin.
 
So it had never worked before - we have always charged the trailer batteries from house power before our weekend trips, and on longer trips we have had 120v in the campgrounds, so we never noticed that it was not charging up while driving.

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