CONTENTS / MAY 2021 p. 12 Technology and shop efficiency P. 24 Equipment Vehicle complexity and its impact on maintenance Considerations for spec'ing, servicing, and maintaining today's more complicated vehicles. p. 18 In The Bay Why fleets should bypass the urge to bypass aftertreatment systems Aftertreatment systems have come a long way in 14 years. With the right training, tools, and understanding of diagnostic procedures, fleets can relieve many of their common pain points without running the risk of illegal tampering. » Improving aftertreatment systems in vocational applications p. » 24 O N T H E CO V E R Spec'ing and service P. 12 VIEWS FROM THE EXPERTS 40 Management The business of parts By Joel Levitt Shop Operations Considerations for optimal shop efficiency SPRINGFIELD RESOURCES Employing best practices throughout the shop leads to high quality work that is done efficiently and productively. 42 Training Bolstering your technicians By George Arrants ASE EDUCATION FOUNDATION SPOTLIGHT ON... 50 Guest Editorial Keeping the lights on By Kyle O'Dell p. 32 OPTRONICS INTERNATIONAL | USA HARNESS INTERNATIONAL Under Vehicle Retreading done right For many fleets, a successful retread program could offset initial new tire costs and boost a fleet's overall return on investment. p. 36 Body & Cab Latest developments in electric APUs Battery-powered auxiliary power units can help to reduce emissions, fuel costs, and engine wear. Want to contribute? Contact us at editor@FleetMaintenance.com Training and tools P. 18 D E PA R T M E N T S FROM THE EDITORS 8 Uptime ADAS service strategies 10 Editor's Note Vocational vehicle VMRS 4 Fleet Maintenance | May 2021 On the cover: Illustration by Fleet Maintenance 183398701 | Anawat Sudchanham | Dreamstime and photo courtesy of ComEd 43 Fleet Parts & Components What's new in products for more efficient fleet operation. 44 Tools & Equipment A roundup of the latest tool and equipment offerings. 49 Classifieds