2003 Chevy Silverado 1500 "ABS" light on

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Old 08-20-17, 11:44 AM
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2003 Chevy Silverado 1500 "ABS" light on

Greetings. Background: Only 54K miles, seldom driven, but at least once every 3 weeks for 5 miles or so to keep battery charged. Only long term issue is a very slow leak in rear trans. seal, have to top off fluid maybe once a year.

Started this morning, within a minute the ABS light came on followed a half minute later with the check engine light. Brakes work fine incl. parking brake, so I assume some sensor is to blame, hopefully not a computer module out, that gets expensive.

Tried re-starting vehicle several times, but lights still on. Are there some simple things I can check before taking it to dealer? Of course, the inspection sticker goes out next month and I assume the inspection will fail if they see this light on.

Thanks!
 
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Old 08-20-17, 11:51 AM
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If you don't have an OBD-II code scanner.... take your vehicle to one of the big parts places like Pep Boys, Advanced Auto, etc. They will scan your computer and tell you what the codes are..... usually for free. Armed with that... you can better tell what the problems are.

Correct.... if the check engine light is on.... the inspection computer won't even connect.
 
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Old 08-20-17, 12:40 PM
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Thanks PJ, I should have known that, as I've got a ScanGuage II permanently plugged in on my every-day car for real-time data. A 2003 model year isn't too far back for the OBDII standard, is it?
 
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Old 08-20-17, 12:41 PM
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Not at all.... an OBD-II scanner will work fine.
 
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Old 08-20-17, 12:44 PM
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Thank you kindly, DIY.Com to the rescue again!
 
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Old 08-20-17, 03:46 PM
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Typical with these truck( I have an 06, is the speed wheel sensors in the hub. Chevys are notorious for rusting and these sensors fit in a hole in the hub. The rust separates it and move it away from the castle wheel.

I just replaced one on mine and was lucky to get it out. Otherwise a new hub will be needed.
 
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Old 08-20-17, 08:41 PM
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Thanks, lawrosa...I got auto parts store to pull code, and got P0446---EVAP Vent System malfunction. It might be like my Toyota, in that practically any "P" code causes the anti-lock /stability control light to come on, even tho it has nothing to do with the brake system. So I checked for the usual suspects like loose gas cap, loose hoses, wire connectors hanging, but didn't see anything amiss. I dealt with the same code a few years ago on my Toyota, turned out to be a loose wire connection to an intake duct sensor next to the air filter.
 
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Old 08-20-17, 11:03 PM
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Old 08-21-17, 08:30 PM
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Interesting video, I didn't even check the hoses under the vehicle... I'll snoop around more tomorrow.
 
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