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This is the same GM Denso-style 170-Amp alternator discussed a moment ago (Interchange Part #84143540). The "911-198" stamping visible on the bracket leg in the final picture is an ink-stamped factory batch or inventory code, not a component part number.
Vehicle Fitment
This unit fits your 2021 Chevrolet Silverado
1500. It is the correct direct factory replacement for the 4.3L V6, 5.3L V8, or 6.2L
V8 engine options across several model ranges: & Summit Racing +1
• Chevrolet Silverado & GMC Sierra 1500
(2014-2021)
• Chevrolet Tahoe & Suburban (2015-
2020)
• GMC Yukon & Yukon XL (2015-2020)
• Cadillac Escalade & ESV (2015-2020) ITEM SPECIFICS (Crucial for Filters)
• Condition: New (Other) - Open box, never installed. Excellent clean condition as pictured.
• Brand: Aftermarket Premium (Denso-Style
Heavy Duty)
• Manufacturer Part Number (MPN):
84143540
• Interchange Part Number: 84143540,
23481273, 23143540, 84318721, 104211-9070
• Amperage: 170 Amp
• Voltage: 12 V
• Pulley Groove Quantity: 6-Groove Clutch
Pulley PRODUCT DESCRIPTION
Premium Replacement 170-Amp Heavy
Duty Alternator
Up for sale is a brand new, never installed Denso-style high-output 170-Amp alternator.
This high-quality replacement unit provides stable, maximum charging system performance under heavy electrical loads, making it ideal for trucks with towing packages, snow plows, or upgraded audio systems.
Please review all listing photographs carefully to verify physical matching and casting shapes before purchasing.
