I found out that I have a severe case of obsession. The GM service records
(obtained from a local GM dealer's computer here) track the mileage at
services through the three years, and it progresses perfectly.
The fuel usage discrepancy may be due to the fact that some dash instrument
module (dunno know more than that - I'd have to check the part numbers on
the service record) was exchanged last September. They send them in to a
central GM service center for "rebuild", and it could well be that on the
one installed the fuel usage wasn't zeroed out since testing, or the last
owner of the module, etc.
Thanks for all the ideas and suggestions. Now I can just appreciate how
nice it is to have a (relatively) new truck !!
Karl
> And please let us know what you find so the rest of us will know what to
> watch out for.
>
> Mike Frerichs
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