C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

sys flashing in dash

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Old Nov 9, 2010 | 10:24 PM
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Default sys flashing in dash

Recently I had my break booster replaced at a local chain repair shop. I returned to pick up my car, they battery was dead and would not start. I then promtly walked back inside to imform them they need to figure it out, quickly. Found they did not adjust the break light switch at the break peddle. The lights just stayed ON. Ya think you may have noticed that little bright row of lights at the back end of the car....
Anyway, after charging of my battery and driving for nearly 2 weeks, i still have the "sys" light in the dash also my fuel guage shows empty. I have tried the search on here as i do on a regular basis, it is a corvette. I have not found anyone with the same fuel guage issue associated with the sys light. looking forward to any help. thanks in advance.
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Old Nov 9, 2010 | 11:13 PM
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Originally Posted by sharp90
Recently I had my break booster replaced at a local chain repair shop. I returned to pick up my car, they battery was dead and would not start. I then promtly walked back inside to imform them they need to figure it out, quickly. Found they did not adjust the break light switch at the break peddle. The lights just stayed ON. Ya think you may have noticed that little bright row of lights at the back end of the car....
Anyway, after charging of my battery and driving for nearly 2 weeks, i still have the "sys" light in the dash also my fuel guage shows empty. I have tried the search on here as i do on a regular basis, it is a corvette. I have not found anyone with the same fuel guage issue associated with the sys light. looking forward to any help. thanks in advance.
If my 90's cluster isnt really tight it will do that
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Old Nov 10, 2010 | 08:27 AM
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With the "sys" light flashing, there is a code stored in the ccm. That code might be of some help in diagnosis. Look in the forum "search" function for info on reading ccm (not ecm) codes, I believe your year self-diagnoses.
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Old Nov 10, 2010 | 07:48 PM
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Originally Posted by jeffp1167
If my 90's cluster isnt really tight it will do that
Either that or a weak battery.
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Old Nov 12, 2010 | 06:19 PM
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i beleive it may be a weak battery as its was drained by the repair shop
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Old Nov 14, 2010 | 10:19 PM
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I've had my SYS flashing for month but everything works and no codes are stored (96 LT4). I read somewhere that replacing factory stereo will do that. Just in case youve done anything else like changing stereo.
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Old Nov 14, 2010 | 11:57 PM
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Originally Posted by sharp90
also my fuel guage shows empty.
Fill up the tank with gas. Duh.
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Old Nov 15, 2010 | 01:16 AM
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Typically the battery is bad or has a low charge.
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Old Nov 15, 2010 | 07:30 PM
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Originally Posted by Z-07 freak
Fill up the tank with gas. Duh.
If only I could be as savy as you.
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Old Nov 15, 2010 | 07:38 PM
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found the main problem, battery is less than a year old. when then brake booster was operated on, the pedal switch was imporperly adjusted causing the brake lights to stay on. the ccm code was stored as a weak battery. cleared the code and will now move on with diagnosis of fuel level issues. thank you to all with usefull advise, unlike blondes with large mamories beleiving that they really brains, when infact, they're just a mound of fat with a nipple.
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Old Nov 16, 2010 | 01:06 AM
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Old Nov 16, 2010 | 08:45 AM
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Classy. Thank you for illustrating my point.
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Old Nov 16, 2010 | 04:50 PM
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You're welcome diamond farter.
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Old Nov 16, 2010 | 05:15 PM
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Originally Posted by Z-07 freak
You're welcome diamond farter.
not sure what that would be....but, okay.
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Old Nov 16, 2010 | 11:47 PM
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Thanks for keeping us informed on what you found as it may help us in the future
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Old Nov 17, 2010 | 07:13 AM
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Originally Posted by sharp90
found the main problem, battery is less than a year old. when then brake booster was operated on, the pedal switch was imporperly adjusted causing the brake lights to stay on. the ccm code was stored as a weak battery. cleared the code and will now move on with diagnosis of fuel level issues. thank you to all with usefull advise, unlike blondes with large mamories beleiving that they really brains, when infact, they're just a mound of fat with a nipple.
Yet another example of why to do your own repairs.
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Old Nov 17, 2010 | 11:34 PM
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Originally Posted by sailorsteve
Yet another example of why to do your own repairs.
Agreed. Also, found they had disconnected vacuum lines as well. nice.
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To sys flashing in dash

Old Nov 18, 2010 | 07:00 AM
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Originally Posted by sharp90
Agreed. Also, found they had disconnected vacuum lines as well. nice.
AHA, they "prepped" your car so you will come in for the "next" repair?
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Old Jun 29, 2014 | 04:17 PM
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Default my 90 has a sys flashing on dash

Originally Posted by primalurges
I've had my SYS flashing for month but everything works and no codes are stored (96 LT4). I read somewhere that replacing factory stereo will do that. Just in case youve done anything else like changing stereo.
my 90 has sys flashing on dash too . battery was also low , have charged it now how do I clear the ccm code ?
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Old Jun 29, 2014 | 05:55 PM
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Originally Posted by Joe
my 90 has sys flashing on dash too . battery was also low , have charged it now how do I clear the ccm code ?
I answered the other thread you tagged on to that was nearly 9 years old, This one is nearly four years and I'd suggest you just start a "NEW THREAD" and mention your problem or challenge. Always state the year - in the other thread I supplied you a link that should be all you need to know about clearing the CCM codes and the explanation of them and how to scan several systems on your car using the DIC. If your car has C68 (auto-air) there are diagnostics that can be done using it also.

If you need to just start a "NEW THREAD"!
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