User`s guide

April 2012 3
When a Tool Number Isn’t a Tool
Today’s GM Service Information (SI) is typically authored in one
location and then translated for use in many different countries.
ThisrequiresresourcesandinputfromallGMglobalregionsto
determine the best service strategies and special tools needed
to properly repair GM vehicles. The goal is to have common
service procedures and special tools when new vehicles are
launched.
Since the 2003 model year, all new special tools have used a
global tool number that begins with a prefix of two alpha char-
acters followed by five numbers (e.g. EN-49010 – Flywheel
Holder). There are six tool groups:
GE General
EN Engine
DT Transmission
CH Chassis
EL Electrical, SIR
BO Body, Frame, Trim
Tools created before the global tool numbering system was
implemented in 2003 are referred to as legacy tools. They may
have several different numbering formats depending upon which
GMglobalregioncreatedthetool.Toolswithasingle“J”prex
identify tools developed primarily in North America, whereas
a“KM”prexindicatesthetoolsweredevelopedprimarilyin
Europe. Both are followed by 3, 4, or 5 numerals. A suffix indi-
cates the tool has been revised, superseded or is part of a kit.
Every attempt is made to minimize the need for new essential
tools each model year by using existing tools from prior models
and other GM global regions. Legacy tools within each GM
global region are reviewed for each new vehicle launch prior
to the development of new tools. This is why it’s important to
never discard old special tools as additional applications may be
found to avoid new tool releases.
IfalegacytoolfromoneGMglobalregion(JorKM)isfound
to work on a new vehicle, it can be used in other GM global
regions. In these cases, a duplicate Administrative Tool
Reference Number is created to add the global tool prefix to
the legacy numbering. For example, chassis tool KM-12345
becomes CH-12345. The Administrative Tool Reference Num-
ber is used in the SI procedure as a reference. The numbering
sequencedoesnotchange,onlytheprex.Thisallowstheuse
of the same procedure in all GM global regions with the intent
to achieve consistency in special tool numbering.
When working within SI, if you see a tool number that is not
familiar to you, click the Special Tools link in the procedure. This
will take you to the Special Tools table, where the local number
is listed along with all the regional tool numbers associated
with that tool. These special tool numbers may have originated
in other GM global regions, such Europe, Korea, Australia or
Brazil. Choose the number that is recognized in your location.
ForNorthAmerica,thesewilltypicallybetheJ-numbered
tools. Each tool will be physically marked with the released tool
number. Tools are not marked with the SI Administrative Tool
Reference Number.
TIP: When ordering tools from SPX (Kent-Moore) or viewing
the SPX website, use the entire legacy tool (actual) number and
not the SI Administrative Tool Reference Number.
For more information about the special tool numbering system,
refer to Bulletin #03-00-89-005A.
Later this year, a new special tool reference strategy that elimi-
nates the need for the Administrative Tool Reference Numbers
in SI will be implemented. Thanks for your patience during the
transition to this improved methodology.
Thanks to Russ Dobson and Bob Scherer
No Communication with the
Power Steering Control Module
A Service Power Steering message may
be displayed intermittently on the Driver
Information Center of the 2012 Verano
while driving. During diagnosis, there
may not be any communication with
the Power Steering Control Module
(PSCM). Plus, DTC U0131 (Lost
Communication with Power Steering
Control Module) may be set in other
control modules.
TIP: When using GDS 2, if a “Power
SteeringNotSupported”messageis
received, delete the vehicle session
from GDS 2 and reload the vehicle
to verify the correct RPOs were
selected when building the vehicle.
Inspect for a loose X5 connection
at the Underhood Bussed Electrical
Center (UBEC) 80 amp fuse for the
PSCM. If the X5 connection is found
to be loose, repair as necessary and
verify repairs.
Thanks to Bryan Brunner
X5 connection at the UBEC 80 amp fuse
Illustration Tool Number/Description
CH-34730-262
(Reference Number)
J-34730-262
(Actual Number)
Fuel Pressure Test Gauge Adapter
CH-35800-A
(Reference Number)
J-35800-A
(Actual Number)
Fuel Injector Cleaner