I bought a 2004 Monte Carlo with a coolant leak. I started it and drove it on a trailer to get it home. While backing it off the trailer it stopped running and has not started since.
3.8 168,00 miles. I have repaired the coolant leak with an aluminium bypass elbow. The fuel rail pressure is 45 psi, it leaks down with key off and holds steady at 30 psi. the bank 1 plugs are wet. It has spark and compression of 170 and I am stumped. Gonna check the injector pulse with a noid light today.
Any thoughts or ideas would greatly be appreciated

 

Did it have any coolant when it stopped running ro did the engine seize?

Does the engine turn or you get nothing?

If not turning, check the ignition cylinder and switch, check the ICM, then starter, BCM and neutral safety switch which is below the shifter (not sure where, i need to check mine as I'm havign intermittent starting issues).