GM Techline Connect (formerly TIS2Web) is the proprietary software suite that allows communication between a Windows PC and a GM vehicle’s OBD-II port. It requires a specific hardware interface (most commonly the or MDI 2 ) and a paid subscription.
: For dealership staff, the download is typically part of their service profile. Aftermarket Reality gm techline connect download free better
| Tool | Cost | Best for | Limitations | |------|------|----------|--------------| | | ~$100 one-time | Reading/clearing codes, live data, some ABS/SRS | No programming, no bidirectional controls | | VXDIAG VCX Nano (GM) | ~$100–120 (hardware) | Limited programming, diagnostics via unofficial GDS2 clone | Risk of being locked by GM; no warranty support | | ACDelco TDS (Techline Connect’s new name) | Subscription (~$45/day or $1400/year) | Full factory diagnostics & programming | Not free — but cheaper than dealer rates | | Torque Pro + ELM327 | ~$5 for app + $20 adapter | Basic OBD2 codes & sensor data | No GM-specific systems (ABS, airbag, transmission) | GM Techline Connect (formerly TIS2Web) is the proprietary
GM Techline Connect (formerly TIS2Web) is the proprietary software suite that allows communication between a Windows PC and a GM vehicle’s OBD-II port. It requires a specific hardware interface (most commonly the or MDI 2 ) and a paid subscription.
: For dealership staff, the download is typically part of their service profile. Aftermarket Reality
| Tool | Cost | Best for | Limitations | |------|------|----------|--------------| | | ~$100 one-time | Reading/clearing codes, live data, some ABS/SRS | No programming, no bidirectional controls | | VXDIAG VCX Nano (GM) | ~$100–120 (hardware) | Limited programming, diagnostics via unofficial GDS2 clone | Risk of being locked by GM; no warranty support | | ACDelco TDS (Techline Connect’s new name) | Subscription (~$45/day or $1400/year) | Full factory diagnostics & programming | Not free — but cheaper than dealer rates | | Torque Pro + ELM327 | ~$5 for app + $20 adapter | Basic OBD2 codes & sensor data | No GM-specific systems (ABS, airbag, transmission) |