Since 1994
Built by technicians, for technicians.
Diagnostic Hotline was founded to give independent repair shops fast access to veteran automotive specialists. No waiting, no guessing, no wasted parts. Just real experience on the other end of the phone.
Today we continue to serve shops across the US and Canada, helping working technicians work smarter, diagnose faster, and keep their customers moving.
Peter
Founder, Diagnostic Hotline
Official partner since 1997
The official diagnostic hotline for AC Delco.
For 29 years, Diagnostic Hotline has been the official diagnostic support line for AC Delco, part of General Motors. When AC Delco parted ways with our largest competitor over unethical business practices, they hired us and never looked back. That partnership is our proudest credential and one no other hotline can claim.
Our story
Diagnostic Hotline started with one simple idea: when a tough job is staring you down, a second pair of experienced eyes can save the day. We have been that second pair for thousands of shops since 1994.
Our team
Collectively, our team brings 150+ years of underhood expertise. Every specialist on our line has spent years in the bay chasing ghost codes, wrestling wiring issues, and explaining tough repairs to customers.
Our promise
We answer live. We listen first. We walk you through the diagnosis step by step. And we are here whenever you need us, Monday through Friday.