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Asked: Oct 21, 2009 - 12:58 PM
Status: Closed
gpflan
2003 GMC Yukon XL ABS light, service brakes and reduced engine power lights.
2003 Yukon XL. When I hit a bump, abs lights e brake light, and service brake system in dash comes on. Also reduced engine power comes on it shuts off but starts back then the door locks cycle but runs fine till you hit a bump again.
In Maintenance & Repair > Electrical In Maintenance & Repair > Engine > Indicator Lights In Makes & Models > GMC > Yukon XL1 answer - 35 days ago
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Answers
rickmn
Date: Oct 21, 2009 Time: 06:12 PM
This sounds like a poor ground connection. Clean the negative battery terminal and the ground connections from the battery negative to the radiator support or fender, and the battery negative to the engine. Also clean the ground from the firewall to the engine. It's not enough to just look at them, you have to clean them. If that doesn't solve the problem at least you can tell the shop what you've done so far and save a few bucks that way.But bad grounds are most often the culprit when you see this kind of behavior.
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