Bank of Montreal – Sarnia-Lambton Mall Rd. Banking and loan services. Contact Info Phone: 519-542-8508 Location 1362 Lambton Mall Road Sarnia, ON N7S 5A1 View Map Mailing Address: 1362 Lambton Mall Road, ON, Key Contact: Giovanna Savo NAICS Code: 52211 - Commercial Banking Site Selector Map: View location