03 C5Z06 No start issue help!
03 C5Z06 No start issue help! Ok car is a 2003 C5 Z06. Mods are headers, cat back, Vararam intake, tune. Was doing some dig runs yesterday and everything seemed fine. I pull up to the line do a small burnout turn traction control off do the burnout then reverse back to the line. I look down to the cluster to turn traction control back on and its blank(off). All other gauges were working besides the bottom digital screen. I then shut the car off. I waited a Minute then attempted to start the car back up and nothing!!!! I put the key in turn to the on position and that screen isn't even saying corvette by Chevrolet. Its not even doing the normal checks and moving the gauges needles up and down. I disconnected the battery for 10 min hooked it back up and still nothing!!! Put a obd2 scanner on it and nothing is coming up. I held the key to the crank position for 10 seconds and the needles started to move up half way the cut off whole time doing that security light is flashing btw. When I open the door the odometer still reads the mileage in the screen but as soon as I put the key in it goes blank. The security light is on until I put the key in then goes off. Not sure what to do any help would be greatly appreciated
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TECH Fanatic
Joined: Sep 2003
Posts: 1,058
Likes: 1
Ok car is a 2003 C5 Z06. Mods are headers, cat back, Vararam intake, tune. Was doing some dig runs yesterday and everything seemed fine. I pull up to the line do a small burnout turn traction control off do the burnout then reverse back to the line. I look down to the cluster to turn traction control back on and its blank(off). All other gauges were working besides the bottom digital screen. I then shut the car off. I waited a Minute then attempted to start the car back up and nothing!!!! I put the key in turn to the on position and that screen isn't even saying corvette by Chevrolet. Its not even doing the normal checks and moving the gauges needles up and down. I disconnected the battery for 10 min hooked it back up and still nothing!!! Put a obd2 scanner on it and nothing is coming up. I held the key to the crank position for 10 seconds and the needles started to move up half way the cut off whole time doing that security light is flashing btw. When I open the door the odometer still reads the mileage in the screen but as soon as I put the key in it goes blank. The security light is on until I put the key in then goes off. Not sure what to do any help would be greatly appreciated
Last edited by 03EBZ06; Jul 3, 2013 at 01:15 PM.
TECH Fanatic
Joined: Sep 2003
Posts: 1,058
Likes: 1
suggest you start at the power supply on passenger side under the hood and look things over. check for a "wet" pcm also. The C5 has the PCM in a place where lots of water can go. I've had that problem before. did you check the terminals? Thats a good place to start. battery voltage? ground near the passenger side header on frame tight? grounds tight near right andleft radiator supports? nut on alternator tight?
look around
If you can't connect to the pcm w/scanner, then for sure the pcm is not working.
look around
If you can't connect to the pcm w/scanner, then for sure the pcm is not working.
