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:
(Klaus?) After an "updated programming", some 03s and 04s get 13.5MPG?
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08-22-2004, 12:41 PM
mmayo
Hummer Veteran
Join Date: Apr 2004
Location: San Antonio
Posts: 50
I sent mine back to him after I installed the one he tuned. Once you put the tuned one in you'll never want to put your old one back in!!!
mmayo
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