ABS Light Due to Poor Electrical Ground Under the Battery Tray on GMC Sierra 1500

A poor electrical ground under the battery tray may cause the ABS warning light to illuminate. Our technicians tell us that cleaning and properly securing this ground and also the main ABS ground on the frame rail below the drivers door may be necessary.

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Average mileage: 130,853 (60,500–264,000)
9 model years affected: 1999, 2000, 2001, 2002, more2003, 2004, 2005, 2006, 2007
16 people reported this problem
3 people shared problem details
1999 GMC Sierra 1500264,000
ABS and or brake light randomly appears then goes away
ABS dash lite comes on sometimes while driving on roads. Hit a bump and the lite may come on or go off. Turnong inig. key will sometimes reset lite to off. May be corrosion problems with speed sensors????
2003 GMC Sierra 1500107,621
ABS light, and associated audible alarm, goes on while driving. Sometimes it goes out on its own, sometimes stays on until ignition is turned off, and truck is restarted. Hasn't been fixed yet, will try checking ground connections as indicated in previous issues noted with this on GMC trucks.
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