I bought a new 2007 1500 Silverado EXT. Cab 4X4 4.8L V-8 with the L1
package; Last month, June 02. 2008.
When I got it, it was getting 13.9 mpg. It is up to 14.5 after 1200 miles;
according to the computer in the truck.
Is this the best I can expect and what can I do to make it better? A friend
with a F 150 put a Chiller intake on his and says he is doing better fuel
wise and picked up HP. He paid $265.00 for it and only took 45 min to
I am thinking about doing the same; should I?