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1. 

Locate a key-on fuse.

a. It only has power when the key is in the “on” 

(or “run”) position.

b. Use a 12 volt test light or your vehicle owner’s 

manual to locate one.

2. 

Remove the fuse

3. 

Locate the unpowered (accessory) 

side of the fuse socket.

a. With the key on the “run” (or “on”) 

position, insert the probe of a 12 volt test 

light into each side of the fuse socket.

b. Mark the side that does not light up.

4. 

Connect the power cable to the 

fuse box.

a. Crimp the fuse spade onto the 

power wire.

b. Slide the fuse tap over one 

metal prong of the fuse.

c. Slide the fuse spade over the fuse tap.
d. Put the tapped fuse back in the fuse box; 

make sure that the tapped side of the fuse is 

placed in the unpowered (accessory) side of 

the fuse socket (see step 3).

The black ground wire inside the power cable is not required.

5. 

Connect the power cable to the adapter

6. 

Slide the adapter plug switch to KEY.

7. 

Run the HDMI cable under the dash or 

weather stripping.

This is discreet, stylish and will help protect the GT.

8. 

Mount the GT

a. Select a safe place to mount the GT.

1. Make sure not to obstruct the driver’s view.
2. Make sure that the HDMI cable can reach 

the GT with a small amount of slack.

The windshield should be clean and dry.

b. Use the T-slot on the back of the GT to attach 

it to the Universal Windshield Mount (UWM).

c. Position the UWM suction cup on the 

windshield and press the lever on the base of 

the mount towards the windshield to secure 

it in place.

G

:

COMPLETE PHYSICAL INSTALLATION

Steps 1-4 will enable the vehicle key position to control the power state (on/off) of 

the GT; if you do not want the GT to automatically power on and off according to 

the key position, skip steps 1-4.

E

:

PRE-TUNE CHECKLIST

CONNECT THE GT TO THE VEHICLE

D

:

OBDll Port Location

All OBDll ports are located under the 

dash on the drivers side of the vehicle.

Complete physical installation is not required to install the tune to the vehicle. To use 

features like automatic (ignition-controlled) power on/off and the Driving Coach, 

complete installation is recommended. Instructions for complete installation are 

located in section G.

1.

 

Connect the adapter plug to the 

vehicle diagnostic port (OBDII).

The port is located under the dash on the 

driver’s side.

2.

 

Slide the power switch on the adapter 

plug to BAT.

The GT should turn on.

3.

 Connect the GT to the adapter plug.

a.  Use the HDMI cable.
b.   Do NOT use the USB cable.

1. 

Check fuses 

(GM Vehicles Only)

Check the included red fuse card and remove 

fuses before installing the tune. (Replace the 

fuses after the download is complete.)

2. 

Check your battery

Before installation, ALWAYS ensure that the 

batteries are fully charged. If you are not sure, 

connect a battery charger before you begin 

installing the tune.

3. 

Turn electronics OFF

Leaving electronics on (stereo included) may 

prevent a successful download.

4. 

The download

Do not interrupt or disconnect the GT at any 

point during the download. Leave electronics 

off during the entire process.

F

:

1. 

Turn the key to the “on” (or “run”) position.

a.  Do NOT start the engine.

2. 

Go to the Main Menu (top left button).

3. 

Choose 

Install Download

.

4. 

Follow the instructions on the GT screen.

a. You will be prompted to turn your key to the “off” or “on” 

position and then press Continue.

b. Do NOT start the engine when turning the key to the 

“run” (or “on”) position at any time during the download.

c. You may be prompted to make choices about vehicle-

specific settings such as the speed limiter. The GT 

owner’s manual (available online at 

www.bullydog.com

has more information on these settings.

5. 

After the installation replace any removed fuses.

INSTALL THE TUNE

or

The key-on fuse should be either a 10 

or 15 amp fuse

Bully Dog r

ecommends installing during business hours: Monday-Friday 7am-6pm MST

.  Bully Dog technical support: 940-783-9915

Bully Dog recommends installing during business hours: Monday-Friday 7am-6pm MST.  Bully Dog technical support: 940-783-9915

Bully Dog recommends installing during business hours: Monday-Friday 7am-6pm MST.  Bully Dog technical support: 940-783-9915

Bully Dog r

ecommends installing during business hours: Monday-Friday 7am-6pm MST

.  Bully Dog technical support: 940-783-9915

Doc. #40410-289 v5.4

When doing future software updates be sure to go 

to “return to stock” from the main Menu 

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