Vortech 2003-2004 Chevrolet SS - Manual (Page 21)

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P/N: 4GL020-015
©2008 Vortech Engineering, LLC
All Rights Reserved, Intl. Copr. Secured
08OCT08 GM Trk/H2(4GL..015v5.0)
A. Remove the plastic cover protecting the vehi-
cle ECM. Unsnap the ECM from the bracket
securing it to the inner fender. Temporarily
move the ECM to the side to aid in the brack-
et relocation.
B. Remove the two screws securing both the
battery tray bracket and the upper tab of the
ECM bracket. Remove the final screw secur-
ing the botton of the ECM bracket. Remove
the ECM bracket from the vehicle.
C. With a grinder, modify the plastic bracket by
removing the strengthening ribs as shown in
(Fig. 2-a)
D. Using a .25" drill, enlarge the two threaded
holes where the ECM bracket was secured.
(See Fig. 2-b..
E. Put the ECM bracket back in the vehicle plac-
ing the mounting tab underneath the original
bracket. Place the battery tray mounting
bracket back into its stock position. Using the
supplied 6mm x 50mm screws, fender wash-
ers, 6mm nuts and two .894 spacers, secure
the brackets using the original mounting holes
that have been enlarged. Use the spacers
between the ECM bracket and the inner fend-
er mount to space the ECM bracket down.
(See Fig. 2-b.)
F. Secure the ECM to the relocated bracket and
re-install the cover.
Fig. 2-a
2. COMPUTER RELOCATION (H2 Hummers 2003-2007)
Fig. 2-b
HOLES TO BE ENLARGED
BATTERY BRACKET IN
STOCK LOCATION
SUPPLIED SPACER
BRACKET IN
RELOCATED POSITION
RIBS TO BE REMOVED
NOTE: 2008 H2 Hummers will not need this step.