As you know, ALDL is basically just serial.
All the modules from VN-VZ for SRS, Airbag, Cluster etc all communicate with ALDL which is the old school CLASS-2 (GM-LAN) Network. The later models like VE use a single wire low speed CAN communications for GMLAN.
If the cable can do ALDL then its fine. But the ELM327 etc ive used dont. Most ALDL cables are just a USB to Serial with a transistor.
Dont forget the ELM type cases you can buy