Board index Predator 2 Support Predator 2 for GM 2010 Chevy Avalanche 5.3L Flex Fuel 87 Econ tune

2010 Chevy Avalanche 5.3L Flex Fuel 87 Econ tune

Discuss Predator 2 for GM vehicles.

Moderator: sohfast94


Posts: 1
Hi All,
I searched but did not find a topic on my question.
I installed the 87 economy tune and saw a drop in fuel economny of a full 1 MPG.
I was getting 18.6 MPG highway with base OEM cal.
I put in the Diablo 87 economy tune with tire diameter change only and lost a full MPG over 500 miles.
I have gone back and forth now twice, same delta.
Any thoughts?
I do have the latest version install on my unit.
Confused in NY. :drivingbad:


Posts: 53925
Location: DiabloSport World Headquarters

are you saying you calibrated the speedo at the same time you loaded the tune?
if so, whatever you were seeing before the speedo was calibrated was incorrect....now that you corrected speedo you are seeing real data...
Mike Litsch
Powerteq Customer Service Manager
Diablo Tech support by phone:
561-908-0040x4
M-F 8:00 AM to 5:00 PM EST


Return to Predator 2 for GM