Skip Navigation

XpressKit OBDTHDGM1 Interface Harness

Allows you to connect the DB-ALL module in select 2006-up GM vehicles

Find what fits your vehicle


Can't find your exact vehicle?

Item # 607OBDDGM1

Low Stock

Add to Cart

Ask an expert

Our VA-based experts can help.




Our take on the XpressKit OBDTHDGM1 Interface Harness

Databus interface harness saves time

XpressKit's OBDTHDGM1 interface harness comes in handy when you're using a DB-ALL databus module to install a security system in certain GM-built vehicles, saving you hours of installation time and wiring hassles. The OBDTHDGM1 allows plug-and-play installation in most instances, but may require additional connections of up to three wires in some vehicles. Warranty: limited lifetime.

What's in the Box:

  • OBDTHDGM1 GM T-harness for DB-ALL

Hands-on research

Product Research


GM OBD Screw-In Type T-Harness For DBALL (RXT only): The OBDTHDGM1 T-harness works with the XpressKit DB-ALL interface module (607DBALL, sold separately) to help you install a SmartStart system (such as the 607VSM200/607VSM250, sold separately) in your General Motors vehicle. Your GM vehicle must be equipped with factory keyless entry and remote start. The harness has plugs that match the factory connectors of your vehicle to greatly reduce cutting and splicing into the factory wiring and save you time. Some hardwiring may still be necessary for installation. With the help of the online configuration tool, you can select an RF kit of your choice to enable Factory Remote Start activation (RXT).

Note: The OBDTHDGM1 T-harness features a screw-in type OBD plug. Check your factory OBD plug to see if it is also has a screw-in type OBD plug. Factory OBD plugs with a snap-in type connector require the OBDTHGM2 (607OBDDGM2, sold separately).

Vehicle Compatibility: Click here for a list of compatible vehicles.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A


Searches related to the XpressKit OBDTHDGM1 Interface Harness Allows you to connect the DB-ALL module in select 2006-up GM vehicles