Lingenfelter L300090607 Lingenfelter Suburban Yukon Aux Fan Kit ECM Fan Control 2005-07 v1.0 - Manual (Page 3)

Page 2.
1. Using a 10 mm socket wrench, disconnect
the negative (-) battery cable from the terminal
on the battery. If you have two (2) batteries
disconnect them both. Cover the cable end(s)
with electrical tape so accidental connection to
the battery does not occur.
2. Using a pry tool or flat blade screwdriver,
remove and save the eight plastic pushpins
from the radiator support cover. The push pins
will be used to re-install the cover.
3. Remove the radiator support cover from
the vehicle. Set aside to be re-installed later.
This fan kit requires reprogramming of the production
engine control module (ECM) in order for the vehicle to be
able to control the fans.