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Rebuilt 454 running rich??
I have a 1998 Silverado 3500 crew cab, 454 and 4L80E tranny. I just had the motor and tranny rebuilt. If you stand at the rear of the truck while it is running you can smell how rich the exhaust is. Its REALLY rich smelling. The computer isn't throwing any codes though. Can I adjust this or is it just a computer thing? Also, does anyone know what this truck/motor/trany combo gas mileage should be?
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