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Originally Posted by bnaylor3400
Putting in a re-programmed PCM such as DHP may not give you any better gas mileage. The 02 sensors may help so that is a good route. Front is AC Delco AFS-109, Rear AFS 123. Use AC Delco only and not any Bosch brand.
The AC Delcos show up on EBay periodically or you can get them through the dealer or someone who sells AC Delco parts.
Also the basics like proper tire pressure and tune up - spark plugs and driving conservatively.
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Hey Bob,
I thought the rear was AFS-141?
Coorect me if I'm wrong, but that is what I just got in the mail and I'm a little concern now
