BT DieselWorks AutoSync User manual

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BT DieselWorks AutoSync – Installation guide
Firmware v2.20 and up only (Dec. 2019+ and newer AutoSync’s will already have 2.20 or higher from the factory)
Requires ‘IO4’ (4” screen) or ‘IO5/IO6’ (8” screen) radios. Does not work on ‘IO3’
2014-2018 Silverado/Sierra 1500
2015-2019 Silverado/Sierra 2500-3500
2015-2020 Tahoe/Yukon/Suburban/Escalade/Denali
Thank you for purchasing the BT DieselWorks AutoSync. The AutoSync is a patent-pending revolutionary
new easy-to-install module that adds many enhanced functional and comfort features to your GM K2xx
truck or SUV. Please be sure to also follow the quick-start guide on the ‘AutoSync installation guides’
page on our website. It is important to register your AutoSync and pair it to your WiFi network as soon
as possible to receive the latest firmware updates and new feature additions.
NOTE: These instructions cover AutoSync’s with firmware v2.20 and up only! To check your firmware
version, access the AutoSync menu, go to page-4, and press “AutoSync info”.
I know these instructions are long/boring, but PLEASE try to at least glance over every page first. 95%
of tech support email/questions we get are simply due to misunderstanding/not reading the
instructions.

NOTE: 2017+ vehicles have several feature limitations and also require one additional minor wiring
change under the dash at the Serial Data Gateway module connector. Please see the additional 2017+
supplement document instructions on our website on how to perform this wiring change/pin swap.
NOTE: Some menu items are shown/hidden depending on whether the vehicle is in the “key on
engine off” mode, or “key on engine running”. If a menu button that you are looking for seems
“missing”, confirm that the vehicle is in the proper mode (engine running/not-running) first!

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INDEX
Introduction…….Page 1
Installation/basic operation…….Page 3-4
EFILive/EZ Lynk SOTF tune switching (diesel only), Active Fuel Management disable (gas only)…….Page 5
Strobe lights mode/work lights mode/reverse spotlight mode…….Page 6
Viewing live engine data…….Page 7-8
Viewing backup camera while moving, turn-signal-activated backup camera…….Page 9
High idle mode, Reading/clearing engine codes (DTCs), SecurIdle (theft-deterrent shift lock)…….Page 10
Torque converter lockup controller (optional feature, and only available with diesel)…….Page 11
Diesel Particulate Filter force-regen…….Page 12
Launch Control (optional feature)…….Page 13
Transmission relearn functions (only available with diesel)…….Page 14
Viewing live vehicle dynamics data (G-forces, etc)…….Page 15
Reprogram TPMS warning threshold or disable TPMS…….Page 16
Learn new remote keyfobs…….Page 17
BCM / HMI reflashing (extend remote start, LED hyperflash disable) …….Page 17
Fuel system tests (only available with diesel)…….Page 18
0-60mph performance timer…….Page 19
Change daytime running light settings and fog lights w/ high beams…….Page 20
Video-in-motion, auto headlight override, remote keyfob window control, radio VIN clear…….Page 21
Installing DSP/SOTF control wire, AutoSync info page/Serial number location.……Page 22
Updating your AutoSync firmware…….Page 23-26

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On the AutoSync, there two momentary push-buttons on the top of the module marked “A” and “B”, a
row of DIP switches (normally not used, covered by sticker), and a status LED. The AutoSync must
remain plugged in at all times for features to work. You can use AutoSync with an OBD port splitter (to
use simultaneously with another scan tool, Edge Insight, EZ Lynk, etc), however compatibility is NOT
guaranteed unless you use the BT DieselWorks OBD splitter, available at our website. AutoSync will
not drain your battery when left plugged in with the vehicle off, and it will not cause any harm if you
unplug/plug-in AutoSync while the vehicle is running.
Inline DIP switches (if present): ALL MUST BE SET TO “OFF”
You should NOT have to adjust any AutoSync DIP switches, they should already be correct from the factory
Installing the AutoSync is as simple as plugging it into your truck’s OBD port, located under the dash. Be
sure the ignition is OFF when installing the AutoSync. The AutoSync will NOT void any powertrain or
bumper-to-bumper warranties, and is completely undetectable by the dealer. As soon as the AutoSync is
unplugged, all traces/footprints are removed. The LED shows AutoSync system status at a glance: RED-
AutoSync is powered up, but vehicle CAN bus activity is NOT being detected. BLUE- AutoSync is powered
up, and vehicle CAN bus activity is being detected. GREEN- AutoSync is powered up, CAN bus is active,
and engine is running. If the LED does not turn on when plugged in, check the “DLC/DSM” fuse.
NOTE: AutoSync data display is default set to US/SAE units, if you wish to see data in metric units,
simply use the factory Driver Info Center (DIC) controls to set the vehicles units to “metric”. The
AutoSync will detect this change directly from the vehicles Body Control Module and automatically
reconfigure itself to metric units.

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To activate/display the AutoSync main menu with the key on, engine NOT running, press the cruise
control “CANCEL” button on the steering wheel.
To activate/display the AutoSync main menu with the engine running, press the rear defrost button 4
times in a row (4 times within ~4 seconds). To step “back” a menu page at any time, press the “< BACK”
button on the radio controls, OR press the “

” icon at the top left of the screen. To exit the AutoSync
menu at any time, press the “home” button on the radio controls, OR press the “Exit” icon at the top
right of the screen.
If at any time the menu does not “draw” correctly or appears to freeze, simply press the “back” button
to manually refresh the menu. Sometimes if the truck is “really busy”, the menus might take an extra
second or so to “draw”…if that happens, just be patient and give it a second to breathe between clicking
the icons/buttons. 
The AutoSync main menu will appear, as shown below, with the back/exit/home buttons circled:

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ECM Tune Switching (diesel)
Active Fuel Management disable (gas)
Diesel vehicles: This ECM tune switching menu is found on AutoSync main menu, page 1. This menu
allows you to control EFILive DSP or EZ Lynk SOTF tune level. Simply tap whichever tune you want to
switch to, and the DSP/SOTF mode will immediately be changed. The currently selected tune will be
highlighted with a “( )” around the number, as shown in the picture below.
NOTE: requires additional AutoSync DSP/SOTF tune control wiring kit, sold separately. See page 17 of
this instruction manual for the AutoSync DSP/SOTF wire kit installation guide.
Gas vehicles: The icon that shows “ECM Tune Switching” in the picture below only shows on diesel
vehicles. When AutoSync is plugged into a gas vehicle, this icon will be replaced with “AFM:
Enabled/Disabled”. To disable the Active Fuel Management mode on your gas vehicle, set this to
“DISABLED”. This setting will be remembered permanently, you do NOT have to set AFM to disable
every time you drive the vehicle.

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Strobe Lights
Work Lights
Reverse work lights/spot lights
Strobe Lights – Found on page 1 of the AutoSync main menu. This activates exterior strobe light mode.
This will rapidly flash all exterior lighting (headlights, front turn signals, rear turn signals, CHMSL, reverse
lights, fog lights) in an alternating pattern. CHECK LOCAL LAWS regarding use of this feature! In most
areas, using vehicle lighting in this manner on public roadways is considered ‘impersonating a police
officer’. 2017+ vehicles, this feature only works with key on, engine off. We are currently working on
an update to allow engine-running strobes on 2017+.
Work Lights – Found on page 1 of the AutoSync main menu. This activates exterior work light mode.
Work light mode manually turns on all cargo/bed lighting, as well as reverse lights. This feature is useful
for illuminating the rear of the vehicle at night, hooking up trailers at night, checking on cargo, etc. This
feature will also work while driving, unlike the factory cargo light button that will only work when in
park! 2017+ vehicles, this currently only works key on, engine off. We are currently working on a fix
for 2017+.
Reverse Work Lights – Found on page 3 of the AutoSync main menu, ONLY visible with key on, engine
NOT RUNNING. This menu item is hidden with engine running. Setting this feature to ON will make the
cargo lights and tow-mirror spot lights (if equipped) come on automatically whenever you shift into
reverse. This is helpful to automatically provide additional illumination while backing up, without having
to manually press the cargo light switch. This setting is saved permanently, even if the AutoSync is
unplugged. 2017+ vehicles, this currently only works key on, engine off.

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Viewing Live Engine Data
The “Powertrain Data” feature is found on page 1 of AutoSync main menu
The powertrain data page displays live engine/transmission data, as shown below.
Diesel PIDs include boost, EGT, coolant temp (ECT), oil pressure, current gear, torque converter clutch
(TCC) locked/unlocked, DSP/SOTF tune, turbocharger vane position, actual fuel rail pressure (aFRP),
desired fuel rail pressure (dFRP), main injection fuel rate, main injection timing.
Gasoline PIDs include spark advance, knock retard, MAF, MAP, engine load, coolant temp (ECT), oil
pressure, current gear, torque converter clutch (TCC) locked/unlocked.
NOTE:the “EGT” reading is derived from the factory “EGT-1” sensor, located in the factory downpipe at
the outlet of the turbocharger (LML) or “EGR-1” in the manifold (L5P). If this sensor is unplugged or
removed due to an aftermarket downpipe, EGT will not display correctly and will default to “1832*F”.
If your truck is ‘deleted’, you can extend the factory sensor wiring and re-locate the factory EGT-1 sensor
to the exhaust manifold for a more accurate “pre-turbo” reading.
(continued on page 8 below)

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There are two additional icons/buttons on the bottom of the Powertrain Data screen.
The “RECORDS” icon will display a page that shows the peak recorded values for each PID. These PID
peak records are stored permanently even if the AutoSync is unplugged. To clear/reset the PID peak
records, press the “ERASE” icon on the bottom of the “engine data records” page.
The “Minimize” icon will shrink the live engine data display to a small bar along the bottom of the
screen. This is helpful for keeping essential data at a glance, while still being able to view the navigation
map, radio controls, etc.
Due to the smaller size of the “minimized” view, only two PIDs are able to be displayed at once in this
mode. To cycle through the pages of minimized data display, press the drivers door lock button. To
switch back to the engine data full page, press the “Show Maneuver” icon.
Another great feature of the “minimized” mode, is that this minimized data is also mirrored on the
Driver Info Center (DIC) display in the instrument cluster, for easy/quick viewing without having to look
over at the radio/navigation screen. To view the engine data in the DIC, use the steering wheel DIC
controls to switch to the “NAVIGATION” page in the DIC, as shown below (non-Denali shown, Denali
instrument cluster is similar/works the same way). NOTE: DIC data display is only available when the
“minimized” engine data view is active. To fully hide the minimized data view on the radio/nav screen,
while still keeping the DIC data display active, press the “Dismiss” icon on the radio/nav screen, shown
above. Press “Show Maneuver” to return to the full engine data page (this will simultaneously cancel
the DIC engine data display, as explained above).
If the minimized view on the radio/nav screen has been “dismissed” or accidentally cleared, simply
press the rear defrost button 4 times to re-enter the AutoSync main menu.

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Viewing backup camera while moving
Turn-signal-activated backup camera
View Rear Camera – This is found on page 2 of the AutoSync main menu. Press this icon to momentarily
switch to the backup camera display. The backup camera will display for roughly 5 seconds, and then
automatically return back to the AutoSync menu. Requires camera wiring mod on 2017+ vehicles.
Turn signal camera – This is found on page setting is to enable/disable the AutoSync feature that
automatically activates the backup camera for several seconds whenever a turn signal is activated
(helpful for checking blind spots). Requires camera wiring mod on 2017+ vehicles.
VERY IMPORTANT NOTE: There is a menu item on page 3 called “RVC Backup Lights”.
This item is only available/visible with key on engine OFF. The way the backup camera is wired from the
factory, the AutoSync must command the reverse lights on for a half second to power on the camera.
If you find this reverse light flash “quirk” objectionable, you can re-wire the backup camera to be
powered on all the time, eliminating the need for the AutoSync to flash the reverse lights. This involves
cutting/splicing a wire at the tailgate wiring harness. If you do NOT want to do any rewiring and do not
mind the fact that the reverse lights will flash for half a second if you manually turn the camera on while
driving, set the “RVC Backup Lights” button to ON. If you want to do the camera re-wire and eliminate
the reverse light flash, set the “RVC Backup Lights” to OFF.
NOTE: If you have the “RVC Backup Lights” set to OFF without having done the wiring modification,
the radio screen will be blank and/or say “service rear vision system” if you use the AutoSync to
manually turn the backup camera on while driving. CHECK THIS SETTING FIRST BEFORE EMAILING ME
SAYING “HEY, THE BACKUP CAMERA OR TURN SIGNAL CAMERA FUNCTION DOESN’T WORK!”

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High Idle Mode
Read/Clear engine codes (DTCs)
SecurIdle (theft-deterrent shifter lock, 2015-2016 only)
High idle mode is found on page 2 of AutoSync main menu. When turned on, this will raise the engine to
~1200rpm. Excellent for warming up the engine in the cold, improving air conditioning performance
while parked in extreme hot weather, or jump starting other vehicles. NOTE: Vehicle must be stopped,
transmission in park, and foot off brake pedal. If brake pedal is applied while high idle is active, high idle
will automatically turn off. NOTE: high idle may take ~15 seconds to fully “kick in” and reach 1200rpm,
this is normal.
Current DTCs – This function is found on page 2 of the AutoSync main menu. This will read and display
any current or pending powertrain Diagnostic Trouble Codes. NOTE: DTC reading is automatically
initiated as soon as you press the “Current DTCs” menu icon. Do NOT immediately press the “read
DTCs” button.WAIT several seconds for DTCs to show up, and the screen to show “<<END>>”. If the
DTCs or “<<END>>” does not show up within ~5 seconds, press the “Read DTCs” icon to re-initialize the
DTC request process. To clear all current DTCs, press the “Clear DTCs” button.
SecurIdle – This feature (only visible/accessible on the AutoSync main menu page 2 with key on,
engine off), allows you to lock the shifter in “park”, even when the brake pedal is depressed. This is
useful if you want to leave your truck running but not allow anyone to easily drive it away. When this
menu button is set to “ON”, whenever the truck is locked using the remote keyfob while running (a
quick-release keychain for your remote keyfob is recommended), SecurIdle is activated. If SecurIdle is
activated and someone breaks into the truck, when they step on the brake pedal to try to shift out of
park, the stereo will beep continuously and the shifter will remain locked. SecurIdle is automatically
disarmed when the truck is unlocked with the remote keyfob. NOTE: Unplugging the AutoSync will
disable SecurIdle within ~5 seconds.