ACDelco 4405 Battery – 47G Replacement
Our ACDelco 4405 battery is engineered to deliver dependable starting power and deep-cycle performance for light trucks, SUVs, and commercial vehicles. This premium AGM (Absorbed Glass Mat) battery replaces Group 47 applications with proven cold-cranking amps and vibration resistance.
We designed the 4405 for drivers who demand OE-quality reliability under extreme conditions. Whether you’re running auxiliary electronics or towing heavy loads, this maintenance-free battery keeps your vehicle ready to perform.
- Group 47 BCI size for direct OE fitment in most GM trucks and SUVs
- AGM construction with absorbed electrolyte for spill-proof operation
- High cold-cranking amp rating delivers strong starts in freezing temperatures
- Vibration-resistant design protects internal components on rough terrain
- Maintenance-free sealed case requires no water additions
AGM Construction & Performance Advantages
The acdelco 4405 battery uses Absorbed Glass Mat technology, which suspends electrolyte in fiberglass mats between the lead plates. This design eliminates free liquid acid, making the battery completely spill-proof and safe to mount in multiple orientations.
AGM construction also delivers superior vibration resistance compared to conventional flooded batteries. The tightly compressed mat layers cushion the internal components, protecting them from road shock and engine vibration that can cause premature failure in harsh driving conditions.
Group 47 Fitment & Vehicle Compatibility
Direct Replacement Dimensions
The ACDelco 4405 battery conforms to BCI Group 47 specifications, measuring approximately 9.4 inches long, 6.8 inches wide, and 7.5 inches tall. This footprint matches the factory battery tray in most 1999–2014 GM full-size trucks and SUVs, including Chevrolet Silverado, GMC Sierra, Cadillac Escalade, and similar models.
Top-post terminals use standard SAE automotive thread pitch for secure, corrosion-resistant cable connections. Always verify your vehicle’s original battery group size before ordering, as some trim levels and model years may specify alternate group numbers.
Installation & Maintenance Guidelines
Installing Your New Battery
Before installing the ACDelco 4405 battery, disconnect the negative cable from your old battery and remove any hold-down hardware. Clean the battery tray and cable terminals with a wire brush to remove corrosion, then apply a thin layer of terminal protectant.
Place the new battery in the tray with terminals oriented to match your cable layout. Secure the hold-down clamp to factory torque specifications—over-tightening can crack the battery case. Connect the positive cable first, followed by the negative ground cable, and verify all connections are snug.
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Common Questions About the ACDelco 4405 Battery
The ACDelco 4405 battery fits most 1999–2014 GM full-size trucks and SUVs that originally specified a Group 47 battery, including Chevrolet Silverado, GMC Sierra, Cadillac Escalade, Chevrolet Tahoe, GMC Yukon, and related models.
Always verify your vehicle’s original battery group size in the owner’s manual or by checking the label on your current battery before ordering. Some trim levels and model years may use different group sizes.
We recommend using a smart charger with an AGM or absorbed-glass-mat setting when charging the acdelco 4405 battery. Standard flooded-battery chargers may apply too high a voltage, which can damage AGM cells and reduce service life.
If you only have a conventional charger, use the lowest amp setting and monitor voltage carefully—disconnect when the battery reaches 14.7 volts to avoid overcharging. Most modern vehicle alternators charge AGM batteries safely without modification.
Under typical driving conditions, the ACDelco 4405 battery delivers three to five years of reliable service. Highway-driven vehicles with regular charging cycles often exceed five years, while trucks used for frequent short trips or heavy accessory loads may see slightly shorter intervals.
Battery life also depends on climate—extreme heat accelerates aging, while very cold temperatures can stress the battery during starting. Regular terminal cleaning and maintaining a full state of charge help maximize service life.
Yes, the acdelco 4405 battery features a sealed AGM design that requires no water additions or electrolyte checks during its service life. The absorbed-glass-mat construction immobilizes the electrolyte, eliminating the need for periodic maintenance.
We do recommend inspecting battery terminals every six months for corrosion and ensuring cable connections remain tight. Keeping the battery top clean and dry prevents voltage leakage, but no internal maintenance is needed.
While AGM batteries are generally more tolerant of non-upright mounting than flooded batteries, we recommend installing the ACDelco 4405 in the standard upright position as designed. This orientation ensures optimal terminal access and proper vent operation.
If your application requires angled mounting, the sealed AGM construction won’t leak acid. However, extreme angles may affect terminal clearance and hold-down fitment, so verify adequate space before installation.
The ACDelco 4405 battery delivers robust cold-cranking amps designed to meet or exceed OE specifications for Group 47 applications. Exact CCA ratings vary by production batch and are stamped on the battery label.
Our AGM chemistry maintains higher voltage under load in cold weather compared to conventional flooded batteries, ensuring reliable starts even in sub-zero temperatures. This makes the 4405 an excellent choice for drivers in northern climates.
ACDelco batteries include manufacturer warranty coverage that varies by product line and purchase location. Check with your retailer for specific warranty terms applicable to your 4405 battery purchase.
To ensure warranty eligibility, retain your purchase receipt and register the battery if required by the warranty program. Proper installation and maintenance help prevent issues that could void warranty coverage.