Advanced Diagnostic Consulting

Advanced Diagnostic Consulting ADC was founded by Brent Delfel, an accomplished technician and mentor in the heavy duty industry.

Brent Delfel, founder and owner of Advanced Diagnostic Consulting, offers
diagnostic support, consulting and technician training and development. Brent’s
focus is advanced systems diagnostic and repair in the heavy truck and
equipment market. Brent started his career in 1988 and worked as a technician
for nearly 20 years. For the past 21 years he has been a heavy duty technical
instructor. He hold

s factory certifications in many areas of heavy duty trucks. Brent enjoys working with customers who take pride in training and becoming the
best they can be. What Brent enjoys most is working with young technicians and
helping them develop advanced skills.

03/23/2026

Does your fleet:
Send trucks to the dealer for diagnosing
Diagnostic time that turns into guesswork
Sublet your ADAS calibrations

That’s exactly what we support.
We set shops up with a system that brings that work back in-house—diagnostics and calibration. We are an authorized Autel - North America dealer. We don't just sell you a tool and walk away, we 100% support our customers with tools, adapters, training and updates.

Ran this 12AH M18 dead on accident. Low draw on a USB adapter. Some battery diagnostic and found bank 4 and 5 were dead....
02/17/2026

Ran this 12AH M18 dead on accident. Low draw on a USB adapter.

Some battery diagnostic and found bank 4 and 5 were dead. Working on balancing now. Then will connect to OE charger and let it charge.






12/24/2025

Another successful setup with their new diagnostic tool that will enhance this team’s technical quality and efficiency...
12/23/2025

Another successful setup with their new diagnostic tool that will enhance this team’s technical quality and efficiency in the shop. Thank you Bill and Wade for your professionalism and partnership.

Got an opportunity to work with this fine group of technicians delving into Aftertreatment Diagnostic Data Analysis. ...
11/27/2025

Got an opportunity to work with this fine group of technicians delving into Aftertreatment Diagnostic Data Analysis.

We honor you on Veterans Day and every day with deepest gratitude. Thank you for your service. 🇺🇸
11/11/2025

We honor you on Veterans Day and every day with deepest gratitude. Thank you for your service. 🇺🇸

We are here for another 4 days of and development for a fantastic crew at Denver International Airport. If you’re in...
07/29/2025

We are here for another 4 days of and development for a fantastic crew at Denver International Airport. If you’re in need of fleet support, hit us up.

We are an authorized dealer with phenomenal customer support. We go above and beyond “tool sales”.
06/12/2025

We are an authorized dealer with phenomenal customer support. We go above and beyond “tool sales”.

Well huh, that’s where the garden seeds I’ve been looking for since April were. Guess I should be doing the accounting ...
06/04/2025

Well huh, that’s where the garden seeds I’ve been looking for since April were. Guess I should be doing the accounting more often. Shhh, don’t tell the boss. 🤐

A subtle hint that Brent Instructor needs some clean ADC shirts. 🤷‍♀️
05/12/2025

A subtle hint that Brent Instructor needs some clean ADC shirts. 🤷‍♀️

Address

17350 Tye St SE
Monroe, WA
98272

Website

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