OEM Delco Voltage Regulator D907

Specifications

• MFR: DELCO
• FEATURE 1: 100% New
• FEATURE 2: Stator activated
• FEATURE 3: Full short circuit protection
• SPECS FOR: Delco 22SI Series Oval Plug IR/EF Alternators
• SPECS: 12 Volt, B-Circuit, S-F-L-P Terminals, 14.0 Vset

Used On

• Chevrolet (1998-2009)
• GMC (1998-2009)

Replaces

Delco: 03A31A, 19020407, 407

Lester Numbers

8363, 8364, 8369, 8570, 8572

Unit Numbers

Delco: 10459481, 10459482, 10459483, 10459596, 15095471, 15098392, 15100053, 15178637, 15183649, 15183650, 15183651, 15188853, 15188854, 19020378, 19020384, 19020385, 19020393, 19020394, 19020810, 19020811, 19020812, 19020813, 19020816, 19020817, 19020818, 8600112
GM: 19116396

Vehicle Application

Chevrolet
C4500 Kodiak Caterpillar C7 2003–2005
C5500 Kodiak Caterpillar C7 2003–2005
C60 Caterpillar 3126 2003
C60 "DD 8.2L (N ,T) Dsl." 2004
C60 DD 8.2L (N ,T) Dsl. 2004
C6500 Kodiak L6 7.2L 441cid 2003–2005
C6500 Kodiak L6 7.8L 475cid 2003–2005
C6500 Kodiak L6 7.8L 475cid Isuzu 6HK1-TC 2003–2008
C6500 Kodiak L6 7.8L 475cid Isuzu 6HK1-TC 2003–2009
C6D "DD 8.2L (N ,T) Dsl." 2004
C6D DD 8.2L (N ,T) Dsl. 2004
C70 Caterpillar 3126 2003
C70 "DD 8.2L (N ,T) Dsl." 2004
C70 DD 8.2L (N ,T) Dsl. 2004
C7500 Kodiak L6 7.2L 441cid 2003–2005
C7500 Kodiak L6 7.8L 475cid 2003–2005
C7500 Kodiak L6 7.8L 475cid Isuzu 6HK1-TC 2003–2008
C7500 Kodiak L6 7.8L 475cid Isuzu 6HK1-TC 2003–2009
C8500 L6 7.8L 475cid Isuzu 6HK1-TC 2003–2008
C8500 L6 7.8L 475cid Isuzu 6HK1-TC 2003–2009
Kodiak C8500 Caterpillar C-7 2003–2005
Kodiak C8500 GM 7.8L(476) Dsl 2003–2005
T6500 GM 7.8L(476) Dsl 1998
T6500 L6 7.8L 475cid 1999–2002
T6500 L6 7.8L 475cid Isuzu 6HK1-TC 1999–2002
T6500 6 Cyl. 7.8L 475cid 2003
T6500 L6 7.8L 475cid Isuzu 6HK1-TC 2004–2008
T6500 L6 7.8L 475cid 2004–2009
T6500 L6 7.8L 475cid Isuzu 6HK1-TC 2004–2009
T7500 GM 7.8L(476) Dsl 1998
T7500 L6 7.8L 475cid 1999–2002
T7500 L6 7.8L 475cid Isuzu 6HK1-TC 1999–2002
T7500 6 Cyl. 7.8L 475cid 2003
T7500 L6 7.8L 475cid Isuzu 6HK1-TC 2004–2008
T7500 L6 7.8L 475cid 2004–2009
T7500 L6 7.8L 475cid Isuzu 6HK1-TC 2004–2009
T8500 Series 1998
T8500 Series GM 7.8L(476) Dsl 1999–2003
T8500 L6 7.8L 475cid Isuzu 6HK1-TC 2004–2008
T8500 L6 7.8L 475cid 2004–2009
T8500 L6 7.8L 475cid Isuzu 6HK1-TC 2004–2009
W5500 Tiltmaster L6 7.8L 475cid Isuzu 6HK1-TC 2000–2004

GMC
C4500 Topkick Caterpillar C-7 2003–2005
C4500 Topkick Caterpillar C7 2003–2005
C5500 Topkick Caterpillar C-7 2003–2005
C5500 Topkick Caterpillar C7 2003–2005
C6000 Caterpillar 3126 2003
C6000 "DD 8.2L (N ,T) Dsl." 2004
C6000 DD 8.2L (N ,T) Dsl. 2004
C6500 Topkick L6 7.2L 441cid 2003–2005
C6500 Topkick L6 7.8L 475cid 2003–2005
C6500 Topkick L6 7.8L 475cid Isuzu 6HK1-TC 2003–2009
C6D "DD 8.2L (N ,T) Dsl." 2004
C6D DD 8.2L (N ,T) Dsl. 2004
C7000 Caterpillar 3126 2003
C7000 "DD 8.2L (N ,T) Dsl." 2004
C7000 DD 8.2L (N ,T) Dsl. 2004
C7500 Topkick L6 7.2L 441cid 2003–2005
C7500 Topkick L6 7.8L 475cid 2003–2005
C7500 Topkick L6 7.8L 475cid Isuzu 6HK1-TC 2003–2009
C8500 Topkick L6 7.8L 475cid Isuzu 6HK1-TC 2003–2009
T6500 GM 7.8L(476) Dsl 1998
T6500 L6 7.8L 475cid 1999–2002
T6500 L6 7.8L 475cid Isuzu 6HK1-TC 2003–2009
T6500 6 Cyl. 7.8L 475cid 2003
T6500 L6 7.8L 475cid 2004–2009
T7500 GM 7.8L(476) Dsl 1998
T7500 L6 7.8L 475cid 1999–2002
T7500 L6 7.8L 475cid Isuzu 6HK1-TC 2003–2009
T7500 6 Cyl. 7.8L 475cid 2003
T7500 L6 7.8L 475cid 2004–2009
T8500 GM 7.8L(476) Dsl 1998–2009
Topkick C8500 Caterpillar C-7 2003–2005
Topkick C8500 Caterpillar C7 2003–2005
Topkick C8500 GM 7.8L(476) Dsl 2003–2005
W5500 Forward L6 7.8L 475cid Isuzu 6HK1-TC 2000–2004

Isuzu
FTR L6 7.8L 475cid Isuzu 6HK1 2003–2008
FTR L6 7.8L 475cid Isuzu 6HK1 2003–2011
FVR L6 7.8L 475cid Isuzu 6HK1 2003–2008
FVR L6 7.8L 475cid Isuzu 6HK1 2003–2011
FXR L6 7.8L 475cid Isuzu 6HK1 2004–2008
FXR L6 7.8L 475cid Isuzu 6HK1 2004–2011
HTR L6 7.8L 475cid Isuzu 6HK1 2005–2008
HVR L6 7.8L 475cid Isuzu 6HK1 2005–2008
HXR L6 7.8L 475cid Isuzu 6HK1 2006

Features & Benefits

• Genuine OEM replacement part
• Manufactured to original factory specifications
• Regulates alternator output voltage
• Helps maintain proper battery charging
• Supports stable charging system performance
• Original fit, function, and electrical characteristics
• Ideal for alternator rebuilding and repair
• Engineered for long-term reliability

What Does a Voltage Regulator Do?

The voltage regulator controls the alternator's output by regulating current supplied to the rotor field winding. As electrical demand changes, the regulator continuously adjusts field current to maintain the proper charging voltage for the battery and the vehicle's electrical system.

A properly functioning voltage regulator helps prevent battery overcharging and undercharging while protecting sensitive electrical components from excessive voltage. Because charging system performance depends on the interaction between the regulator, rotor, stator, rectifier, and battery, replacing a faulty regulator is an important step in restoring alternator performance.

Common Signs Replacement Is Needed

Replace the voltage regulator if you notice:

• Battery overcharging
• Battery not charging
• Low charging voltage
• High charging voltage
• Battery warning light illuminated
• Intermittent charging problems
• Headlights that brighten or dim with engine speed
• Charging system failure during testing
• Voltage regulator failure discovered during alternator rebuilding

Installation Recommendations

Installation should be performed by a qualified technician or experienced alternator rebuilder. Before installing the new regulator, inspect the brushes, brush holder, slip rings, rotor, stator, rectifier, wiring, and electrical connections for signs of wear or damage.

Always verify connector configuration and mounting style before installation. After assembly, bench-test the alternator to confirm proper charging voltage and overall charging system performance.

While You're Rebuilding

Inspect other common wear components to help maximize charging system reliability:

• Bearings
• Brushes
• Brush Holder
• Slip Rings
• Rectifier
• Diodes
• Rotor
• Clutch Pulley
• Insulators

Why Buy From RC Auto Electric?

RC Auto Electric specializes in genuine OEM and premium aftermarket alternator and starter rebuilding components for professional rebuilders, repair shops, automotive technicians, and DIY enthusiasts. Our extensive catalog includes thousands of electrical components backed by accurate cross-reference information to help simplify part identification and reduce ordering mistakes.

Disclaimer

Compatibility information is provided as a reference only. Manufacturing revisions, production changes, and previous rebuilding modifications may affect internal alternator components. Always compare the original OEM part number, connector configuration, mounting style, voltage specifications, cross-reference numbers, and product photographs before installation. If you are unsure about compatibility, contact RC Auto Electric before ordering.