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2013 Chevrolet Suburban
Platform: GMT 400, 800, 900

09 Suburban 6.0 Cranks but won't start.

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Old October 3rd, 2016, 11:11 PM
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Default 09 Suburban 6.0 Cranks but won't start.

I have a 2009 Suburban that cranks for days but won't start, it has spark and fuel pressure no DTC's set or historical codes. I did a compression test and only have compression on one cylinder of 55. Don't know what the heck is going on any clues, I don't think it detonated and put a hole in every piston or blew every portion of the head gaskets. Cylinder with 55 is 2nd one back from the grill on the driver side and yes I did a wet test and it went up to like 57 all others remained unchanged.
Old October 4th, 2016, 8:47 AM
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Welcome to the forum.

Timing chain broken? Also throttle blade should be wide open when doing compression checks.




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