2009 GMC Sierra 1500 - Oil consumption and one bad plug

William19 · April 9, 2020, 3:38pm

Oil consumption and number 7 spark plug fouling

davepsinbox_157004 · April 9, 2020, 5:49pm

The rings for #7 are probably bad. How severe is the oil consumption? A quart in 500 miles? 250 miles?

Purebred · April 9, 2020, 5:57pm

Compression test needed. Is #7 firing?

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