The THGM610 XpressKit GM T-Harness for DBALL2 is compatible with GM6 and GM10 firmware, eliminating the need to carry two different harnesses. The unique design also supports OBDC connections for enhanced support of SmartStart and is compatible with Standard (STD) and Remote Start Ready (RSR) installation types.;;With its dual head design and type identification markers, installing a remote starter in most GM vehicles is as easy as plug & play.;;The harness features dual head design for both GM6 and GM10 FW support, built-in valet switch for RSR install and high grade (Tier 1) GM connectors for factory-like fit;;Supports RSR and Standard installation types.