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Some codes just don't go away after a repair and need to be erased by diagnostic equipment.
Code readers are not oracles and sometimes produce misleading codes. The general rule is don't replace anything until independent tests have proved it faulty.
If you have a manual transmission, you may have a problem with with clutch pedal switch. Some GM's have a problem with faulty wiring for this switch behind dash. Only way to check is at fuse panel. Look for power going to switch, and power returning to fuse box.
first thing to do is check for codes. this will give you a direction to begin diagnostics . most probable causes are, cranks sensor, ignition module or fuel pump. if you have a tach on the dash and you see rpm during cranking i would eliminate the possibility of a failed crank sensor, if no rpm signal go right to the crank sensor. next check for fuel pressure, 40psi is going to be within specs to allow it to run.
can be caused by anything need to have car scanned for the trouble code most auto stores such as auto zone/ advanced auto offer this service for free the code will help u determine whats wrong and help in fixing problem
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