This switch works with the LB7 engines only 2001-2004 model years.

This switch works with the LBZ and LMM engines only 2006-2010 model years. Also works with 2006 model year Vin 2 LLY.

This switch works with the LLY engines only 2004.5-2005 model years. Does not work with 2006 model year.

Additional license only used to tune additional vehicles.

"We will need your EFI Serial number and authorization code from the tuning tool along with a valid email address in order to complete this order. Details will be emailed to you after purchase. This can sometimes take up to 24hrs or more so please be patient." -JK