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95 S_Trucker · 07-06-2015, 04:02 PM

That decodes to RPO LMG.

5.3, flex fuel, iron block, cylinder deactivation.

That should answer your question about 8 cyl to 4 cyl.

Some have oil consumption issues. Some people will get a tune to keep it from going to 4 cyl mode.

07-06-2015, 04:02 PM	#5
95 S_Trucker Registered User Join Date: Oct 2009 Location: . Posts: 2,179	Re: 09 Yukon That decodes to RPO LMG. 5.3, flex fuel, iron block, cylinder deactivation. That should answer your question about 8 cyl to 4 cyl. Some have oil consumption issues. Some people will get a tune to keep it from going to 4 cyl mode.