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Escalade Intermittent Starting Issue

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Hi Everyone,

I have a 2003 Cadillac Escalade 6L V8. I recently changed the 2 catalectic converters, all oils (differential, engine oil, transmission oil and 4x4 oil all synthetic) O2 Sensor, plugs and wires.

Vehicle was working great when I got it back from the mechanic, unfortunately I seem to have developed an issue with starting the vehicle. When I start the truck up in the morning or when it is cold it turns over and starts on the first turn. If I drive it for 20 minutes park and come back to the truck and try and start it, it takes 2-3 turns to start up.

I have tried clicking the key into the on position to get the pump to turn on then starting it but this is not the problem I can smell the fuel. I had the computer system "re flashed" to fix any software updates but no change to the starting problem.

Any suggestions would be greatly appreciated.

Thank you in advance

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