Problems starting my 2007 chevy hhr 54000 miles and its not the fuel pump. if you try and start engine it just cranks first time and usually starts on 2nd or 3rd try, and runs like a new one even with a/c on. plz help with suggestions and plz don't give me the fuel injector scenario that's not it. what about the hoses inside the pump losing prime from crack or hole is that possible?

Check the security system it can shut off the starter and or fuel systems is there a code flashing or theft light blinking after key is turned ....it has a boot up file per/say

how much fuel pressure are you getting? I f you do not have a way of testing the fuel pressure then when you said has fuel How Much does it pump it out slow, hard and fast whaat?

Can you hear the starter try to engage ?
Do the lights work ?
Have you tried cranking it in neutral ?
If the starter engages but won't turn the engine, and the battery is good, the power steering pump could have failed and that is locking up things. Removing the belt would tell you if the pump is the problem.

Fuel Pump Replacement - Chevy HHR Network

www.chevyhhr.net/forums/how-tutorial.../fuel-pump-replacement-36541...

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The best way to help find the problem, is to have a fuel pressure test done on it, that will tell if the fuel pump is weak, or the fuel pressure regulator is malfunctioning. If the pressure is low, the fuel pump is weak,
if it is high, the fuel regulator is at fault.

My truck did this after I replaced the fuel pump. Turned out to Fuel Pressure Regulator. It would crank and crank but never start. It's located underneath the black plastic manifold on the side of the injectors.

Let me understand that the problem is intermittent and engine is cranking but not started. For that being said, there are 2 main things to check.
1-The start is not on since there is not fuel delivered to the Fuel distribution. Fuel pump is controlled by the pump relay. But the pump relay is activated by the a fuel pump control module which is an electronics integrated module. This is the one gives unstable condition.
2- The start is not on since there is no electric signal to deliver to the primary coil. And this one is controlled by the ignition module. This is an integrated electronic module can give unstable condition.
The last thing to check is the Crank shaft sensor condition since it has to give the signal for the above 2 things to work. Good luck

THIS PROBLEM IS ALMOST ALWAYS DUE TO A FAILED FUEL PUMP PRESSURE CHECK VALVE, REPLACE THE FUEL PUMP.