(Klaus?) After an "updated programming", some 03s and 04s get 13.5MPG?
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http://calid.gm.com/vci/VINEntryPre.do
just enter your vin number, and it'll tell you what updates you've received for your vehicle. Mine matched everything listed above by Paragon. I'd check before approaching the dealer...just may save you some time...
'03 H2
The only downside is instead of an increase in mpg, i've noticed a decrease so far I'll do some more driving to confirm this but regardless, it feels like a brand new truck
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