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Re: 2002 GMC envoy mislabled
Posted to Emissions Forum on 5/5/2002 8 Replies

Aaron, this engine does indeed have egr. It is done through computer controled adjustable cam [...] pcm can advance the timing of the exhaust camshaft at cruise so the timing overlap causes an egr effect.

This can be tested with the proper scan [...] there i... Login to read more.

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