Heavy Duty Journal | Diesel Repair & Fleet Management Hub

BlogFuel Systems & Injection Technology

Diesel Fuel Injector Cleaner: Proven Fleet Manager’s Guide

Michael Nielsen June 7, 2026

BlogShop Operations & Workflow

Why Heavy-Duty Repair Shops Are Replacing Legacy Systems — And What They’re Switching To

June 5, 2026 Blog

BlogCompliance & Safety Management

Driver Vehicle Inspection Report (DVIR): A Complete Guide for Fleet Managers

June 3, 2026 Blog

BlogCompliance & Safety Management

Distracted Driving: The Real Cost to Your Commercial Fleet

June 2, 2026 Blog

Heavy-Duty Truck Repair — 24/7 Roadside Service

Fleet Management & Strategy

BlogFleet Management & Strategy

Fleet Vehicle Procurement: Save 20% on Acquisitions [2025]

BlogFleet Management & Strategy

Fleet Driver Retention: 12 Proven Strategies [2024 Guide]

BlogFleet Management & Strategy

Fleet TCO Guide: Calculate True Vehicle Ownership Costs [2025]

BlogFleet Management & Strategy

DOT Compliance Checklist: Complete Fleet Manager Guide [2025]

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Shop Business & Growth

Blog Shop Business & Growth

Diesel Shop Marketing Strategies: Complete 2025 Guide

November 13, 2025 No Comments

Diagnostics & Technology

Blog Diagnostics & Technology

Diesel Engine Diagnostics: Complete 7-Step Guide [2025]

Master diesel engine diagnostics with this systematic 7-step troubleshooting workflow. Learn to identify fuel, air, and cooling problems in 30 minutes.

September 23, 2025

Blog Diagnostics & Technology

Commercial Vehicle Telematics Data Access: The Fleet Right-to-Repair Battle

OEM data lockouts cost fleets $3,000-$5,000 per truck annually. Learn how right-to-repair legislation and technical solutions are reshaping commercial vehicle diagnostics.

October 17, 2025

Editor’s Pick

Customer Service & MarketingEditors Pick

Truck Repair Directory Marketing: Complete ROI Guide [2025]

BlogEditors Pick

7 Common Cummins ISX Problems: Complete Repair Guide

BlogEditors Pick

Women Fleet Managers: Leadership Driving Fleet Performance

Fleet manager reviewing maintenance analytics on a tablet inside a modern truck service facility while technicians perform preventive maintenance on North American Class 8 semi-trucks to reduce fleet operating costs and improve vehicle uptime.

BlogEditors Pick

Fleet Maintenance Costs: Proven Strategies to Cut 25–30%

New Resource

The HDJ Diesel Mechanic Tools Guide

96 professional tools across 9 categories — curated from 15+ years in the trade.

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Truck Fault Code Lookup

Decode SPN & FMI codes instantly. Get plain-English explanations, drivability guidance, probable causes, and repair cost estimates.

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Preventative Maintenance

Nov13

Winter Fleet Maintenance: Complete Winterization Guide [2026]

Protect your fleet this winter with proven winterization protocols. Battery testing, fluid management, tire prep, brake systems, and emergency readiness.

Nov13

DEF System Maintenance: Complete Fleet Manager Guide [2025]

Learn essential DEF system maintenance practices to prevent contamination, crystallization, and costly SCR repairs. Complete guide for fleet managers and diesel technicians.

Free Download

Diesel Maintenance Checklist

2026 Edition

Complete PM schedule from daily pre-trip to annual DOT inspection. Built for real shops.

50+Checkpoints

6Service Intervals

1Page PDF

Instant PDF No spam 100% free

AI & Fleet Technology

AI & Fleet Technology

How to Evaluate AI Fleet Management Software: Complete Guide

January 31, 2026 No Comments

Fleet safety inspector conducting a commercial truck safety inspection with a checklist beside a Class 8 semi-truck at a fleet terminal, representing driver safety, compliance, and risk management.

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Shop Operations & Workflow

OSHA Compliance Guide for Diesel Repair Shops: 2025 Standards

Michael Nielsen November 13, 2025 Blog Shop Operations & Workflow

Fleet Maintenance SOP: Complete Guide for Fleet Managers

Michael Nielsen January 19, 2026 Blog Shop Operations & Workflow

Blog Owner Operator

Leasing vs Owning a Truck: Owner Operator Guide [2025]

Michael Nielsen December 12, 2025

Compare leasing vs owning a truck for owner operators. Analyze costs, credit requirements, tax implications & 5-year wealth building with 2025 market data.

Tools & Equipment Reviews

Blog Tools & Equipment Reviews

Best Diesel Compression Tester: 2025 Reviews & Buyer’s Guide

Michael Nielsen November 16, 2025

Compare the 6 best diesel compression testers for 2025. Expert reviews, normal PSI values, testing procedures, and buying guide for fleet shops and mechanics.

Customer Service & Marketing

Diesel technician servicing a semi-truck at a commercial fleet yard, representing heavy-duty industry expertise and guest posting authority for trade publications.

BlogCustomer Service & Marketing

Guest Posting for Heavy-Duty Industries: Which Sectors Benefit and How to Get Started

Discover which heavy-duty industries benefit most from guest posting — from trucking and construction to mining, agriculture, and renewable energy. Learn how to build authority, ...

BlogCustomer Service & Marketing

How Truck Repair Shops Can Build Online Content Exposure

Learn how truck repair shops build online content exposure through website optimization, local SEO, Google Business Profile, and reputation management.

Diesel Fuel Filter Maintenance: Complete Guide [2025]

November 12, 2025 No Comments Blog Fuel Systems & Injection Technology

Learn diesel fuel filter replacement intervals, warning signs, and step-by-step procedures. Protect your engine's injection system with proper maintenance.

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Cybersecurity & Freight Fraud Defense

Your ELD Could Be a Backdoor: How Hackers Target Connected Trucks

January 17, 2026 No Comments

Connected trucks face growing cyber threats through ELD cybersecurity vulnerabilities that hackers exploit to access fleet systems and steal data.

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