5500 Duramax brake warning light/chime - Chevy and GMC Duramax Diesel Forum
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post #1 of 3 (permalink) Old 09-06-2008, 09:32 AM Thread Starter
Join Date: Sep 2008
Posts: 3
5500 Duramax brake warning light/chime

We are in Hastings, NE for a motorcycle race in an RV equipped with a Duramax.

As we were backing into our spot, the brake warning light came on as well as the chimes.

Any idea what it could be? It appears that there is pressure on the air tank, and the master cylinder has plenty of fluid.
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post #2 of 3 (permalink) Old 09-08-2008, 12:08 AM
Oh...... Squirrel!
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Join Date: Oct 2006
Location: Irwin PA
Posts: 24,083
Welcome to the Forum!!!

Ya could be a number of things. Try unplugging the electrical sensor on the master cylinder. It measures the fluid level. Also, does the brake lights all work?

2006 Silverado 2500HD LBZ CC SB
Exterior: Escalade Handles, Front windows tinted to match the rear, painted bumpers & mirrors, billet grille, 305/50/20 Cooper Zeons on BMF Novakanes Death Metal, Cognito Braces, Stainless Sleeves, Train Horns
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post #3 of 3 (permalink) Old 09-12-2008, 03:27 PM
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Join Date: Sep 2008
Location: valley of the sun AZ
Posts: 15
on my C4500 i had a problem with the switch on the brake pedel . this switch is about 2" by 4" inches and mount to the brake pedel in the cab under the dash white in color
is the elec. brake pump working or did it stop as well
this switch is a very commen problem with these trucks ....always start with the simple things
might check this switch

2004 C4500 crew cab LLY
still stock with 5 inch stack
Yea it races down the track at speedworld (19.2 ET)
not fast but super fun
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