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Control Modules — 1966 GMC 1000 Series
Every control module on the 1960-1966 GMC 1000 Series — where it lives, replacement time, and what it takes to program a replacement.
Voltage Regulator (VR)0.3 hr R&Rno coding
📍 Firewall-mounted on driver side near master cylinder
⚠️ Electromechanical points-type regulator for generator (1960-1963) or alternator (1964-1966). Not a programmable module; purely mechanical relay device. Replace if charging system fails.
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 1966 GMC 1000 Series 305 cu in (5.0L) GMC V6 (305E) and can vary by trim.
🔧 Built by master technician Chris Hackleman · Master Technician · 20+ years.