Lingenfelter L300090607 Lingenfelter Suburban Yukon Aux Fan Kit ECM Fan Control 2005-07 v1.0 - Manual (Page 7)

Page
17. Mark with a center punch the location of
where the fan shroud mounting holes overlap
the factory front support structure as shown on
the left (yellow arrows).
Using a 3/16” drill bit, carefully drill four holes
(two per fan) into the “A” shaped frame. Only
drill through the front face of the frame, do not
drill all the way through the frame.
6.
16. Using a 7/16” socket wrench, secure the
fan and mounting tab assembly to the bracket
using one of the supplied 1/4-20 Spin Lock
nuts.
18. Secure the fans to the “A” frame using
the supplied self tapping screws (AV12351 &
AV12354). On the driver side use the longer
30mm screws along with the supplied 1/4” thick
round spacers for the smaller 9” (225mm) fan.
Install the spacers between the fan mounting
feet and the holes in the “A” frame.
The fasteners shown in the images are silver
for better visibility in the images and are not the
self tapping fasteners supplied.
19. Remove the plastic cover from the main
fuse and relay center.
Confirm that the fuse and relay center on your
vehicle has the following fuses and relays (see
page 16 for the GM fuse and relay diagrams):
• Fan Low relay
• Fan Control relay
• Fan High relay
• Fuse 57, 40 amp, Fan 1
• Fuse 60, 40 amp, Fan 2