Heavy Duty Journal
Latest Heavy-Duty Industry Coverage
Fleet Management & Strategy
Florida to Texas Auto Transport: Costs, Timing and Checks
Florida to Texas auto transport explained: what drives quotes, broker versus carrier rules, hurricane-season timing, insurance limits and a booking checklist.
Fleet Management & Strategy
Buyer's GuidesFleet Management & Strategy
Comdata Fuel Card for Trucking: A Complete Buyer’s Guide
BlogFleet Management & Strategy
Manual vs Automated Transmission Trucks: The Complete Comparison
BlogFleet Management & Strategy
Fleet Lifecycle Management: A Practical, Costly Guide
BlogFleet Management & Strategy
Fleet Safety Culture: The Complete Playbook for Trucking Fleets
Featured
Editor’s Pick
BlogEditors Pick
Cummins ISX Problems: Complete Guide to 7 Common Issues
BlogEditors Pick
Women Fleet Managers: Leadership Driving Fleet Performance
BlogEditors Pick
Fleet Uptime Optimization: The Complete Availability Guide
Customer Service & MarketingEditors Pick
Truck Repair Directory Marketing: The Complete Guide
Sponsored Partner Spotlight
Shop Business & Growth
BlogShop Business & Growth
Workers’ Compensation for Truck Repair Shops: Complete Guide
BlogShop Business & Growth
Fleet Service Contract Negotiation: Complete Guide
BlogShop Business & Growth
Heavy Equipment Auction Bidding: The Complete Buyer’s Guide
Diagnostics & Technology
BlogDiagnostics & Technology
J1939 Explained: The Complete Guide for Fleet Technicians
Master J1939 communication protocol for heavy-duty trucks. Learn PGNs, SPNs, FMIs, network diagnostics, and troubleshooting strategies for fleet technicians.
BlogDiagnostics & Technology
Diesel Engine Sensor Diagnostics: Complete Fleet Guide
Master diesel engine sensor diagnostics with systematic procedures for MAF, crankshaft, fuel pressure, EGT, and DPF sensors. Prevent costly misdiagnosis.
Preventative Maintenance
Nov19
Brake Chamber Diagnosis, Replacement & Maintenance Guide
Learn brake chamber failure symptoms, diagnostic procedures, replacement steps, and maintenance protocols. Essential guide for fleet managers and technicians.
Nov19
Heavy-Duty Coolant Flush Intervals: Fleet Maintenance Guide
Learn proper coolant flush intervals for heavy-duty diesel trucks. Covers ELC, conventional, and HOAT formulations plus testing protocols for fleet operations.
Free Diesel Maintenance Checklist
Get the free heavy-duty truck maintenance checklist delivered as an instant PDF download.
Instant PDF • 100% Free • No Spam
New Resource
The HDJ Diesel Mechanic Tools Guide
96 professional tools across 9 categories — curated from 15+ years in the trade.
Press Release
NTTR Directory Launches Nationwide Platform Connecting Truckers With Verified Repair Services
January 31, 2026
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Press Release January 31, 2026 — San Francisco, CA NTTRDirectory.com, the National
AI & Fleet Technology
Now Accepting Business Partners
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Join the Heavy Duty Journal Business Directory and connect your company with fleet managers, diesel technicians, shop owners, and heavy-duty industry professionals searching for trusted products and service providers.
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Tools & Equipment Reviews
Trending...
How to Find Your Truck’s SPN and FMI Fault Codes: Complete Guide
Learn 4 methods to find SPN and FMI fault codes on your semi truck. Dashboard access, scanner options, smartphone apps, plus complete FMI reference table.
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Customer Service & Marketing
BlogCustomer Service & Marketing
Truck Repair Shop Customer Retention: A Fleet Account Guide
Read More →Heavy Duty Journal Technical Desk
Fuel Systems & Injection Technology
Practical coverage of diesel fuel delivery, common-rail systems, injectors, diagnostics, maintenance and fuel-system performance.
Latest Fuel Systems Coverage
Diesel Fuel Injector Cleaner: A Fleet Manager’s Guide
Diesel fuel injector cleaner explained: how deposits form, what the evidence shows, how to read a label and how to test a product on your own trucks.
Read Article
More From The Technical Desk
Diesel Fuel Additives for Commercial Trucks: A Fleet Guide
Diesel fuel additives for commercial trucks explained: what each type does, where the evidence stops, and how aftertreatment and storage…
Read ArticleDiesel Mechanic Tools Guide
Featured Heavy-Duty Channels
Cybersecurity & Freight Fraud Defense
BlogCybersecurity & Fraud Prevention
Freight Fraud Prevention: Fleet Manager’s Complete Guide
Read the full article →Expert Insights for Fleet Success
How to Evaluate Heavy Equipment Financing Solutions: A Buyer’s Guide
By Michael Nielsen, Publisher | 15+ Years in Diesel Repair Last Updated: ...
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Heavy Duty Truck Preventive Maintenance Schedule Guide
Learn how to build an effective heavy duty truck preventive maintenance schedule using mileage, engine hours, and calendar-based intervals. Complete A/B/C service guide.
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BlogTechnician Development & Training
ASE Certification for Heavy Duty Trucks: Tests, Fees, Rules
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BlogTechnician Development & Training
Diesel Technician Career Progression: Pay and Credentials
Read More →Ask the Experts Q&A
Ask the Experts Q&A
Heavy Duty Diesel: The Complete Industry Guide for Professionals
Your complete guide to heavy duty diesel—covering engine systems, maintenance strategies, career paths, salary data, and industry trends. Written for diesel technicians, fleet managers, shop ...
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Ask the Experts Q&A
Diesel Engine Power Loss: Complete Troubleshooting Guide
Learn to diagnose diesel engine power loss under load. Expert troubleshooting guide covers fuel systems, turbochargers, exhaust restrictions, and more.
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