The ACDelco / GM 12645694 is the OE V-ribbed serpentine belt for 2017–2019 Chevrolet Silverado and GMC Sierra 2500 HD / 3500 HD 6.6L Duramax diesel trucks with dual alternators.

Features & Benefits

• OE V-ribbed serpentine belt, GM P/N 12645694, dual-alternator application (per GM)
• Drives the engine accessories with a single belt and creates a secure point of contact with the pulleys for traction (per GM)
• Genuine GM / ACDelco OE part, designed, engineered and tested to GM standards and backed by General Motors

Application

• Chevrolet Silverado 2500 HD / 3500 HD and GMC Sierra 2500 HD / 3500 HD with 6.6L Duramax diesel and dual alternators (2017–2019)

Always verify fitment by VIN or by matching the GM/ACDelco part number on your original part before ordering.

Cross-Reference / OE Numbers

• GM: 12645694