ABS Light Due to Poor Electrical Ground Under the Battery Tray on GMC Yukon XL 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: 159,301 (80,000–250,000)
7 model years affected: 2000, 2001, 2002, 2003, more2004, 2005, 2006
15 people reported this problem
3 people shared problem details
ABS PARK BRAKE LIGHTS ON ALL THE TIME
Haven't fixed it yet. But going to give it a try.
light comes and goes. Mostly stays on...
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