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Old 10-29-2014, 05:01 AM
Tech32 Tech32 is offline
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Default fuse box under hood

hey guys i have a 2003 silverado with a 5.3l vin number is 1gcek19t53z124638 it is in for a no start no key power to starter it seem that all the fuses in power distrabution box for ignition have only 4 volts and the rest have 12 un able to find issue any help would be greatly accepted thank you
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Old 10-29-2014, 10:16 AM
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greasybob greasybob is offline
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check the power coming off of the ignition switch. Here's a schematic to help
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File Type: pdf 03 silverado power distribution.pdf (346.5 KB, 9 views)
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Old 10-29-2014, 01:14 PM
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Default no key power

The pink wire has no key power coming out of switch how do I tell if is switch or security system I can get truck to run if bypass switch could that be issue thanks for all your help so far
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Old 10-29-2014, 02:29 PM
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The anti theft wouldn't cut power at the ignition switch, it'll disable the injectors or starter through the ECM. If no power on the pink wire when the switch is in the run or start position, check to make sure the voltage being supplied to the switch is remaining at battery voltage and make sure that the switch is in the correct phase to the key cylinder. If these two are correct then suspect the switch.
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