need info on a chevy 8.1 truck engine?

want to know the good and bad about the chevy 8.1 (496) engine that they put in the 3/4 ton truck. i am looking at a 2002 4X4 2500 with the 8.1 and allison transmission. i all ready know the gas mileage situation being about 10 to 12MPG. other than that is it a good engine and transmission. the truck has 108,000 miles.

3 Answers

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  • 1 decade ago
    Best Answer

    They're a great engine, only issues I know of are intake manifold gaskets, but not as frequent as the small engines.

  • hello
    Lv 6
    1 decade ago

    other than sucking gas it was a decent motor. GM also sold that engine in marine applications where it would continual run for 500 hours, and last ofr 1000 hours. how does that equate??? 1000 hours at 65 mph is 650,000 miles, but you can't coast in the water, so that's like 650,000 miles of towing a trailer.

  • Anonymous
    1 decade ago

    if engine and transmission has been maintain.changing oil and transmission fluid.flushing coolant system.if all been done to engine and transmission.both should be good.

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