Duramax Diesels Forum Truck of the Week
Old 02-17-2018, 07:39 PM
Philv's Avatar
Philv Philv is offline
Join Date: Jan 2018
Location: Surprise, AZ
Posts: 48
Default Horn issue

I've tried to figure this thing out. Horn does work intermently. When engine is running in park it'll sometimes work, but I have yet to get it to work while in gear and or driving. Does anyone have a wiring diagram of the horn so I could possibly trace the system?
2001 GMC Sierra 2500HD SLE EC/LB 4x4
Cold air intake
4" exhaust
Wastegate trickery thingy. Lol
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Old 02-17-2018, 10:14 PM
TheBac's Avatar
TheBac TheBac is offline
Why do I keep doing this?

Join Date: Apr 2008
Location: Mid Michigan
Posts: 11,093


AlldataDIY is your friend. Buy a subscription for your truck. Its worth the small amount of $$. Wiring diagrams and pin-outs galore.

You could also look on GMUpfitter. That site may have something, too.
"BBT" 2003 GMC CC/SB 4x4

"Flyin' Brick" 1999 Chevy 1500 RC/SB 2wd -- in progress
2014 Chevy Cruze Diesel -- the DD

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Reality is a matter of perspective.

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Old 02-18-2018, 12:01 AM
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OregonDMAX OregonDMAX is offline
Join Date: Apr 2013
Location: Goodyear, AZ
Posts: 3,476


Have you pulled the airbag off to check the contactor or wiring
Moonshine tunes, MikeL trans, Exergy Sportsman, 4/6 drop, LML 20's/420's
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Old 02-18-2018, 06:41 AM
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Dozerboy Dozerboy is offline
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Location: TX of course
Posts: 3,485


^^ start there

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06 GMC 2500 CCSB SLT LBZ 4X4

These views expressed on this post are not my own, but rather randomly generated computer gibberish, and in no way should be used to judge the author's IQ or mental health.
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