Choosing the right HVAC electrical trades training material comes down to what you already know and where you want to go. A GM technician with a bay full of pickups needs a different study tool than a career changer watching videos at home, and a collector who loves 1970s schematics has different priorities than a residential AC tech expanding into walk-in coolers. The four options here cover that range: a GM-specific CD-ROM, a DVD video series, a vintage National Technical Schools course book set, and a commercial refrigeration textbook from Delmar Cengage Learning.
Quick Take
The 2001 GM Service Mechanics Repair Training Course CD is a focused, vehicle-specific choice for mechanics working on GM HVAC systems. The HVAC Systems Video Training Series is a DVD-based introduction for newcomers exploring the trade. The VTG National Technical Schools Air Conditioning Refrigeration HVAC Course Books bundle decades of printed lesson booklets, student records, and career development pamphlets for students and collectors. Commercial Refrigeration for Air Conditioning Technicians by Dick Wirz gives AC techs a focused path into commercial refrigeration, with a CD included.
Listed Price Comparison
| Product | Listed Price | Price Bar |
|---|---|---|
| 2001 GM Service Mechanics Repair Training Course CD Advanced HVAC SYSTEM DIAGNOS | USD 10.37 | |
| HVAC Systems Video Training Series | USD 14.95 | |
| Commercial Refrigeration for Air Conditioning Technicians by Dick Wirz with CD | USD 50.00 | |
| VTG National Technical Schools Air Conditioning Refrigeration HVAC Course Books | USD 150.00 |
Decision Matrix
Which one fits your situation? Use these quick matches:
- Need GM-specific HVAC diagnosis? The 2001 GM Service Mechanics Repair Training Course CD is built for that exact task.
- Starting from zero and want to watch and learn? The HVAC Systems Video Training Series is the approachable video-based option.
- Study history and love original course materials? The VTG National Technical Schools set is a comprehensive archival package.
- Already an AC tech and want commercial refrigeration know-how? Commercial Refrigeration for Air Conditioning Technicians is the direct path.
Product Notes
2001 GM Service Mechanics Repair Training Course CD Advanced HVAC SYSTEM DIAGNOS

The 2001 GM Service Mechanics Repair Training Course CD gives GM-focused technicians a compact CD-ROM training aid directly from the General Motors training program. At USD 10.37, it's the lowest listed price in this lineup, and its 2001 publication year means the diagnostic procedures are geared to early-2000s GM vehicles. Choose this CD when your work centers on GM makes and you want a quick reference for HVAC system diagnosis without sorting through a large printed set. The caveat is that it's marked Used, so you're relying on a pre-owned disc, and its coverage stops at the 2001 model context rather than current lineups.
HVAC Systems Video Training Series

The HVAC Systems Video Training Series is a DVD-based introduction aimed at people preparing for an HVAC career, not a deep technical manuscript. It sells for USD 14.95 and bundles video content that walks through system concepts visually, which can help you grasp airflow, charging, and troubleshooting ideas faster than reading alone. The included description ties the series to the strong job outlook for heating, air conditioning, and refrigeration mechanics, so it speaks directly to newcomers weighing a career change. Its limitation is that a video format can't replace the printed diagrams, test questions, or hands-on lab structure you'd get from formal course books, and it doesn't come with the heft of a full textbook.
VTG National Technical Schools Air Conditioning Refrigeration HVAC Course Books

This vintage set is the highest-priced item here at USD 150.00, and it's really a historical archive rather than a quick study guide. The bundle includes 81 core technical course manuals, an original student guide book with handwritten entries from 1978 to 1980, a seven-booklet career development sub-set, and a trade dictionary booklet. If you're a collector, a vocational instructor, or someone who likes to trace the fundamentals of refrigeration through older engineering schematics and wiring prints, this paperback and pamphlet collection is unique. The trade-off: it's in Good condition, and its 1971 publication era means modern refrigerants, electronics, and current equipment designs are simply not represented.
Commercial Refrigeration for Air Conditioning Technicians by Dick Wirz with CD

Written by Dick Wirz and published by Delmar Cengage Learning in 2006, this trade paperback is tailored to HVAC technicians who want to add commercial refrigeration skills. It's in Like New condition and includes a CD with supplementary materials. The 384-page revised format covers the transition from air conditioning service to commercial refrigeration, which makes it a practical next step for someone already comfortable with AC basics. At USD 50.00, it sits between the video series and the vintage collection in price. The limitation is its 2006 publication date, so newer commercial equipment and electronic controls are outside its scope.
Final Recommendation
Choose the 2001 GM CD if your daily work revolves around GM vehicles and you want a compact diagnostic refresher. Choose the HVAC Systems Video Training Series if you're starting a career and prefer visual explanations. Choose the VTG National Technical Schools course books if you value a complete vintage training library with original student materials. Choose Commercial Refrigeration for Air Conditioning Technicians if you're a working AC tech ready to move into commercial systems.