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SECTION 1: ONSTAR EQUIPPED VEHICLES
If your GM vehicle is equipped with the OnStar system, you
MUST
temporarily disable the system BEFORE programming
your vehicle with the Power Programmer III. Please follow the
steps below to temporarily disable the OnStar system.
General Precautions
Many new vehicles are equipped with daytime running lights,
or sensors that turn the headlights on in dim situations automatically
when the ignition is on. For the purposes of programming the
vehicle this presents an unnecessary extra drain on the vehicle
battery. Many new vehicles have a procedure for turning off
the lights. Often this is accomplished by pressing the “Dome
Override” button two (2) to four (4) times in succession.
We recommend that your headlights be off when programming
your vehicle for added safety against corrupt programming due
to battery failure. See your owner’s manual for vehicle specific
information regarding your headlights.
Recommended Precautions
The OnStar system by GM periodically communicates with the
vehicle. This periodic communication with the vehicle has been
known to disrupt the programming process. In order to
prevent
disruption of the programming process, it is recommended
that
the OnStar system be disabled while programming the vehicle.
To temporarily disable your OnStar system in 4.8/5.3/6.0/8.1L
GM vehicles, remove the fuse(s) associated with OnStar. Please
refer to the fuse section of your owner’s manual for instructions
and locations of fuse(s).
The fuse panel will be under the hood of
the vehicle on the driver’s
side behind the battery. In most cases
there will be one (1) fuse in that fuse panel the OnStar system
relies on. See page 5 for an example. For 4.3L GM SUVs, follow
the steps on page 6 to temporarily disable the OnStar system.
When the OnStar system is successfully disabled, its indicator
light on the dash or rearview mirror will be OFF. Be sure that
this light is off when the key is in the ON position (engine not
running) BEFORE
programming the vehicle. This will ensure
that there are no OnStar related problems.
Recovery From OnStar Related
Power Programmer Hang-up
If the programmer stops programming
for an extended period of
time, perform the following steps to recover and/or continue pro-
gramming (see next page):
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