[AT] GM Flex Fuel vehicles

[Jim & Lyn Evans]

I have a 2003 S10 with the 4 cylinder.  It is not a flex fuel, but all the
2002s were.  My only guess is that something changed about emissions,
causing the 2003s to not be flex fuel.  My truck does have a very expensive
($50) flex fuel filter on it.  I think the injectors would have to be
slightly larger on a flex fuel.  All of the lines and other parts would have
to be made for alcohol, but I bet that most trucks already are made that
way.  If E85 ever becomes available here, I will try it in my S10, even
though it is not a flex fuel.  I am sure the power will be a little less on
alcohol since it doesn't have the bigger injectors to compensate.  I bet the
computer will automatically compensate for the fuel.

The nearest E85 pump is over 50 miles away, even though I live next to two
ethanol plants. 

Jim

-----Original Message-----
From: at-bounces at lists.antique-tractor.com
[mailto:at-bounces at lists.antique-tractor.com] On Behalf Of charlie hill
Sent: Monday, July 31, 2006 10:35 AM
To: Antique tractor email discussion group
Subject: [AT] GM Flex Fuel vehicles

I have a question for the resident GM experts.

I have a 2006 GMC sierra pickup.  That same truck and same engine are 
available in a Flex Fuel (E85) version.   I have no plan on trying to switch

mine but I'm curious about the mechanical differences in the two engines. 
Obviously the computers are set up different but does anyone know what else
is different about them?

Seems to me that since GM makes them both ways it should be possible to
change the gas setup to flex fuel with off the shelf parts.
It would probably cost too much and right now it wouldn't make much sense to
do it anyway.  I'm just curious about the process.

Charlie 

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