


BRANICK GM Bypass Adapter, Essential Brake Service Tool
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Professional GM Brake Bleeding - Branick 39GC Bypass Adapter (60 PSI Rating)
The Branick 39GC GM Bypass Adapter (Part# 01-0071) is a professional brake service tool designed for General Motors vehicles with dual-reservoir master cylinders. This adapter integrates with Branick G300 and G300A Pressure Brake Bleeder systems to enable efficient one-person brake bleeding with a 60 PSI maximum pressure rating. The chain-and-grommet retention system with quick-coupler connection allows individual port sealing for circuit-isolated bleeding or simultaneous dual-reservoir operation when paired with a second adapter.
Key Features and Benefits
Applications
- Professional automotive service shops performing brake maintenance on GM vehicles.
- Fleet maintenance facilities servicing Chevrolet, GMC, Buick, and Cadillac vehicles.
- Independent brake specialty shops handling dual-reservoir brake systems.
- Home garage brake maintenance and classic GM vehicle restoration projects.
Technical Specifications
| Specification | Details |
|---|---|
| Model Number | 39GC |
| Part Number | 01-0071 |
| Maximum Pressure | 60 PSI |
| System Compatibility | Branick G300/G300A Pressure Brake Bleeder |
| Vehicle Application | GM dual-reservoir master cylinders |
| Fluid Compatibility | DOT 3, DOT 4, DOT 5.1 |
| Weight | Approximately 2 lbs |
| Manufacturing | Made in USA (Fargo, ND) |
| Warranty | 1-year commercial warranty |
Installation Requirements
Requires Branick G300 or G300A Pressure Brake Bleeder (sold separately) and compressed air supply at 100-175 PSI. Installation involves removing the master cylinder reservoir cover, inserting the grommet seal, securing the chain assembly, and connecting the quick coupler. No permanent vehicle modifications required.
Streamline Your GM Brake Service
Order the Branick 39GC today and experience professional-grade brake bleeding efficiency backed by a 1-year commercial warranty.
Frequently Asked Questions
Does the Branick 39GC adapter work with both G300 and G300A brake bleeder systems?
Yes, the 39GC is fully compatible with both the Branick G300 and G300A Pressure Brake Bleeder systems. The quick-coupler connection integrates seamlessly with both models, providing the same 60 PSI pressure capability and one-person operational efficiency across both platforms.
Can I bleed both master cylinder reservoirs simultaneously with the 39GC?
Yes, but you need two 39GC adapters and the separately-sold #20 Dual Bleeding Attachment (part# 901-051). One 39GC adapter seals one reservoir port at a time for circuit-isolated bleeding. Pairing two adapters with the #20 attachment enables simultaneous bleeding of both reservoirs, reducing service time by approximately 50%.
Is the Branick 39GC adapter recommended for ABS-equipped GM vehicles?
Yes, the 39GC carries OEM-recommended designation specifically for anti-lock brake system applications. The pressure bleeding method using the G300 system keeps compressed air and brake fluid separated, preventing air introduction that can contaminate ABS hydraulic control modules, which are difficult and expensive to purge once air-contaminated.
What comes included with the Branick 39GC adapter?
The 39GC includes the complete adapter assembly: chain and eyebolt mounting hardware, grommet seal, quick coupler nipple with 1/4-28 thread, J hook securing mechanism, and wing nut hardware. The Branick G300/G300A Pressure Brake Bleeder, compressed air supply, and #20 Dual Bleeding Attachment are sold separately and required for operation.
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