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09 LS3 Intermittent start - cranks but no start & eventually starts Hello all and Thank You for your suggestions! All great tips! I caved and ended up taking it to GM ~ I'm posting what I had checked into along with GM's findings in hopes this can be used for future "Vetter's" ~ save you...

09 LS3 intermittent start - cranks but no spark no fuel just started Okay, battery tested Okay... additionally replaced fuel and A/C relays (35, 55)... started no issue. I shut it down, tried to start again, crank but no start. What's next? (please/thank you) Cheers, LS3 LNewman ~

Thank you Rob... this is very frustrating I'm not sure whether to start basics (check fuel sensors, injectors... clean/replace, etc...) suggestions of those with sim. experience are greatly appreciated!.... Cheers, Lilly

Intermittent start issues, when it does start, it runs/drives great... does not shut down until I shut it off... new to this forum. Can anyone help? Temp does not appear to be an issue Intermittent start - when it starts, it runs it drives... When does not it does not start/ cranks but no spark...

Hey there, new to the forum... I have an 09, LS3 Vette with intermittent start issues. Have changed relays... still issues. When it starts, it cranks... no error codes. Temp does not appear to be an issue. If it does start, it runs fine, 5 or six times... hooked up to basic diags; no error...