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Abs and Brake lights come on while driving.

1999silverado1500z71

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1999silverado1500z71 Enthusiast

1999silverado1500z71

Posted
Posted

Hey everyone, for the last year and a half or so the abs and brake lights on my 99 silverado will come on after driving it a little while. Before they would not come on for a week and then some weeks they light up all the time which is why i never did anything about it but now it lights up pretty much everytime I drive it. I had my buddy scan it and the code c0265. I googled the code and found out it has something to do with a relay circuit and loss of communication. I'm wondering what the code means for sure and if anyone else has had the same problem and what can be done to fix it.

 

 

Thanks,

Nick.

SSSilverado23 Enthusiast

SSSilverado23

Posted
Posted

Probably a brake light switch. Easy fix. Cheap part. Its the plug that is connected to the brake pedal.

LAWYER2 Enthusiast

LAWYER2

Posted
Posted

This is actually a common problem from what I've discovered. Do a search and you'll get tons of information. The most common source is a bad ground to the module controller. It's grounded in the inside of the frame near the driver-side door. Mine came on last night when hitting a bump in the road.

1999silverado1500z71 Enthusiast

1999silverado1500z71

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Posted

I looked at the link you gave me above and I still think the module is bad inside. I did some research and found out about module master that rebuilds abs modules for 150 bucks. Has anyone ever used them before? It seems like a pretty good deal compared to spending close to 1,000 bucks for a new module. Only problem I'm gonna have is getting the module off the pump. I live in Iowa and the torx bolts look to be rusted pretty good. But what can you expect from a 99 thats seen winter roads every year. Looks like I might have to undo the brake lines and take the whole pump off the frame to get the module separated from the pump. Anyone else had this tough of problem getting the module off?

kdm101 Enthusiast

kdm101

Posted
Posted

Thumbs up on ModuleMasters.

 

Just went through this on mine. 13 years and 163k miles before the module completely failed. I took it to the local dealer for diagnostics - not only was the module failing diagnostics, but so was the pump. On went the ebay special, but its module was dead too! So, off to Modulemasters it went. Less than a week later, I had it back. Got it installed a day or 2 later and no more brake lights. 5 year warranty on the rebuild and I still have the original module just in case.

a.j.vaughan82 Enthusiast

a.j.vaughan82

Posted
Posted

would this cause like a pulsing feel on the pedal just before u stop, cause mine is doin that, i havent had it scanned yet but the abs light came on almost once a day for like two weeks then hasnt been back since but the pedal thing bugs me its like hitting a patch of ice just as u come to a complete stop thankfully i dont live in the city so not too many short stops. o i have a 2004 gmc sierra 5.3 4x4 crew 105k mi

1999silverado1500z71 Enthusiast

1999silverado1500z71

Posted
  • Author
Posted

I've never had the pedal pulsate on my truck before stop. I think in time I will take mine to the dealer and have them take a closer look to tell me exactly what is wrong. My lights have been coming on for at least a year and a half but now they come on everytime I drive the truck.

asc08 Enthusiast

asc08

Posted
Posted

would this cause like a pulsing feel on the pedal just before u stop, cause mine is doin that, i havent had it scanned yet but the abs light came on almost once a day for like two weeks then hasnt been back since but the pedal thing bugs me its like hitting a patch of ice just as u come to a complete stop thankfully i dont live in the city so not too many short stops. o i have a 2004 gmc sierra 5.3 4x4 crew 105k mi

 

 

This may be the low speed ABS activation that has plagued Chevy's and GM's. The ABS will activate while you are braking and get down to 5 mph or so. It has to do with corrosion building up under the Wheel Speed Sensors on the front wheel hubs, causing a bad signal to the ABS system.

 

There are a number of posts on this, but basically, after checking the front wheel speed sensors, you can remove, clean the mounting surface and re-install.

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