In StockNew Alternator Replacement For 2002-2004 Cadillac Escalade Base ESV EXT 5.3L 6.0L 10480388, 321-1798, 321-2104, 334-2491, ADR0215, 40012139, 40012139R
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For GMCAlternator

Alternator 40012139R for GMC V8 8.1L Engine

OEM / REF: 40012139RSKU: pilotpart385748

New Alternator Replacement For 2002-2004 Cadillac Escalade Base ESV EXT 5.3L 6.0L 10480388, 321-1798, 321-2104, 334-2491, ADR0215, 40012139, 40012139R is a Alternator replacement part indexed for Part Number and GMC Yukon XL 2500 · V8 8.1L · 2003-2005, with 3 application records on file. Match OEM part number 400121...

Stock
In stock
Condition
New
Fitment
GMC Engine Spare Parts
Category
Alternator
  • Fitment support before you order
  • Worldwide delivery options

Alternator Description

This Alternator is indexed for Part Number; GMC Yukon XL 2500 · V8 8.1L · 2003-2005; GMC Yukon XL 2500 · V8 6.0L · 2000-2004; GMC Yukon XL 1500 · V8 6.0L · 2001-2004. Compare reference number 40012139R against the label on your existing GMC component before ordering.

Before checkout, compare OEM part number 40012139R, connector layout, mounting position, and machine serial number. For high-value or fitment-sensitive parts, submit the fitment form below so support can verify the match.

Applications

  • Part Number
  • GMC Yukon XL 2500 · V8 8.1L · 2003-2005
  • GMC Yukon XL 2500 · V8 6.0L · 2000-2004
  • GMC Yukon XL 1500 · V8 6.0L · 2001-2004
  • GMC Yukon XL 1500 · V8 5.3L · 2000-2004
  • GMC Yukon · V8 5.3L · 2000-2004
  • GMC Yukon · V8 4.8L · 2000-2004
  • GMC Sierra 3500 · V8 8.1L · 2001-2005
  • GMC Sierra 3500 · V8 6.6L · 2001-2005
  • GMC Sierra 3500 · V8 6.0L · 2001-2005
  • GMC Sierra 2500 HD · V8 8.1L · 2001-2005
  • GMC Sierra 2500 HD · V8 6.6L · 2001-2005
  • GMC Sierra 2500 HD · V8 6.0L · 2001-2005
  • GMC Sierra 2500 · V8 6.0L · 1999-2004
  • GMC Sierra 2500 · V8 5.3L · 1999-2000
  • GMC Sierra 1500 HD · V8 6.0L · 2001-2003
  • GMC Sierra 1500 · V8 6.0L · 2002-2004
  • GMC Sierra 1500 · V8 5.3L · 1999-2004
  • GMC Sierra 1500 · V8 4.8L · 1999-2004
  • GMC Sierra 1500 · V6 4.3L · 1999-2004
  • GMC Savana 3500 · V8 8.1L · 2001-2002
  • GMC Savana 3500 · V8 6.5L · 2001-2002
  • GMC Savana 3500 · V8 6.0L · 2003-2004
  • GMC Savana 3500 · V8 5.7L · 2001-2002
  • GMC Savana 3500 · V8 4.8L · 2004-2004
  • GMC Savana 2500 · V8 6.5L · 2001-2002
  • GMC Savana 2500 · V8 6.0L · 2003-2004
  • GMC Savana 2500 · V8 5.7L · 2001-2002
  • GMC Savana 2500 · V8 5.3L · 2003-2004
  • GMC Savana 2500 · V8 5.0L · 2001-2002
  • GMC Savana 2500 · V8 4.8L · 2003-2004
  • GMC Savana 2500 · V6 4.3L · 2001-2004
  • GMC Savana 1500 · V8 5.7L · 2001-2002
  • GMC Savana 1500 · V8 5.3L · 2003-2004
  • GMC Savana 1500 · V8 5.0L · 2001-2002
  • GMC Savana 1500 · V6 4.3L · 2001-2004
  • GMC Safari · V6 4.3L · 2001-2004
  • GMC C3500HD · V8 8.1L · 2001-2002
  • CHEVROLET Tahoe · V8 5.3L · 2000-2004
  • CHEVROLET Tahoe · V8 4.8L · 2000-2004
  • CHEVROLET Suburban 2500 · V8 8.1L · 2003-2005
  • CHEVROLET Suburban 2500 · V8 6.0L · 2000-2004
  • CHEVROLET Suburban 1500 · V8 5.3L · 2000-2004
  • CHEVROLET Silverado 3500 · V8 8.1L · 2001-2005
  • CHEVROLET Silverado 3500 · V8 6.6L · 2001-2005
  • CHEVROLET Silverado 3500 · V8 6.0L · 2001-2005
  • CHEVROLET Silverado 2500 HD · V8 8.1L · 2001-2005
  • CHEVROLET Silverado 2500 HD · V8 6.6L · 2001-2005
  • CHEVROLET Silverado 2500 HD · V8 6.0L · 2001-2005
  • CHEVROLET Silverado 2500 · V8 6.0L · 1999-2004
  • CHEVROLET Silverado 2500 · V8 5.3L · 1999-2000
  • CHEVROLET Silverado 1500 HD · V8 6.0L · 2001-2003
  • CHEVROLET Silverado 1500 · V8 6.0L · 2003-2004

Specifications

Part Number40012139R
SPECIFICATIONS105 Amp/12 Volt, CW, 6-Groove Pulley, 04: 00 Plug Clock
DESIGNIR/IF
VOLTAGE12
AMPERAGE105
ROTATIONCW
PULLEY CLASSS6
FEATURE 1100% Top-rated
FEATURE 2premium rectifier & regulator
FEATURE 3Premium, hi-temperature bearings

Fitment Notes

Brand or application signal
GMC Engine Spare Parts
Product family
Alternator
System category
Engine Spare Parts > Engine Auxiliary Components > Alternator
Recommended verification
OEM number, engine model, serial number, old part photos, and dimensions.

Shipping & Returns

Availability
InStock
Shipping
Shipping quotes can be confirmed before payment for heavy or urgent orders.
Returns
Returns are easier when fitment is confirmed before ordering.
B2B support
Bulk, fleet, and repair-shop requests can be handled through the inquiry form.

Frequently Asked Questions

How do I confirm this part fits my machine?

Match the OEM or reference number first, then verify machine model, engine model, serial number, connector layout, mounting points, and old part photos.

Can I order if my part number is not listed?

Yes. Send the old part number, machine plate, and photos through the fitment inquiry form. Support can review possible replacements or alternatives.

Is this an OEM part?

Products are indexed as replacement parts unless explicitly marked otherwise. Always compare reference numbers and confirm fitment before purchase.

Confirm fitment

Send machine details before ordering high-risk parts.