I have a 03 venture with 286k miles. It has been doing the whole security flashing thing for years. A few months ago it started leaking coolant , couldn’t find from where. Last week the radiator started leaking and it over heated. I switched out the radiator. Now it won’t start.
The battery is good and charged. All the fuses are good and continuity tested. They relays click except for the starter relay. I swapped with another relay and still no starting. It does not start in park or neutral.
The starter was tested and worked. I jump the starter out and it starts. It dies 2 seconds after I remove the jumper wire.
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