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Backfire on start ?

Thoe97

By Thoe97
April 15, 2004 in Gen III & Gen IV V8 Engines (LS-Based)

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Thoe97

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Thoe97

Posted April 15, 2004

Posted April 15, 2004

Every 30 -40 starts I'll get a "backfire" right at turn of key for start up ?

It's real quick and short.. any ideas appreciated as this is my first GM truck

Jeremy WI

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Jeremy WI

Posted April 18, 2004

Posted April 18, 2004

If I remember correctly, there is a TSB on this issue that says the crankshaft position sensor must be replaced.

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