How to replace the alternator in a 4.3L engine on GMC Sierra 1500?

For replacement of the generator in the 4.3l engine, firstly, detach the negative Battery Cable, and take off the air cleaner outlet resonator. Then, remove the Drive Belt, and remove the engine wiring harness clip from the A/C Compressor/condenser hose bracket, and then, remove the A/C Compressor and condenser hose bracket bolt. Unsrew the heater outlet hose clamp bolt at generator bracket then unscrew the engine wiring harness connector from the generator and shift the engine wiring harness boot. Retract the engine wrire harness nut lead from the generator while removing the generator bolts and repositioning the heater outlet hose and the A/C Compressor/condenser hoses as the generator can be removed from the bracket. For installation, put the generator in the bracket and align the hoses accordingly. Mount the generator bolts and tighten them up to 50 n.m (37 lb ft). Connect the engine wiring harness lead to the generator stud and fix the nut to the generator and tighten it to9 n.m (80 lb in). Connect the electrical connector of the generator to the engine wiring harness boot and position the boot over the generator stud. Install the heater outlet hose clamp bolt at the generator bracket with a torque of 25 n.m(18 lb ft) and the A/C Compressor and condenser hose bracket bolt at the same torque. Replace the engine wiring harness clip to the A/C Compressor/condenser hose bracket, replace the Drive Belt and put everything back, replace the air cleaner outlet resonator and lastly connect the negative Battery Cable again.

How to replace the alternator on GMC Acadia?

To change the Alternator, disconnect the negative Battery Cable and the Drive Belt should be removed as well. Reposition the battery positive junction block cable boot , and remove the battery positive junction block cable from generator nut , then battery positive junction block cable terminal from the generator stud. Now disconnect the engine wiring harness electrical connector from the generator, and take off the power steering reservoir inlet hose clip from the power steering fluid reservoir hose clip bracket. Loct ite the idler pulley bolt and slide the pulley out as far as possible before gen nuts. Next, remove the air conditioning (A/C) compressor/evaporator hose bracket from the left generator stud, and the power steering fluid reservoir hose clip bracket from the right generator stud. Take out the generator and idler pulley from the vehicle, then separate the idler pulley from the generator. Attach the idler pulley on the generator, mount it on a vehicle. Secure the generator to the studs, and attach the power steering hose fluid reservoir clip bracket to the left generator stud and the a/c compressor/evaporator hose clamp bracket to the right generator stud. Fasten generator nuts finger tight and idler pulley bolt also finger tight. The specified generator bolt/nuts are tightened in a sequence as follows; idler pulley bolt, left nut and right nut, to 50n.m (37 lb ft). Reattach the power steering reservoir inlet hose clip to the power steering fluid reservoir hose clip bracket and plug the engine wiring harness electrical connector into the generator. Connect the battery positive junction block cable terminal to the generator stud and tighten the battery positive junction block cableugo the generator nut 22 n.m (16 lb ft). Replace the battery positive junction block cable boot over the stud and on to reinstall the Drive Belt, and at last complete reconnect with the negative Battery Cable.

OEM GMC Alternator

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129 Alternators found

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GMC Alternator Part Number: 19244747
$321.98 MSRP: $603.01
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Product Specifications
- Other Name: Generator Assembly, (Remanufacture); Generator, Engine Electrical
- Replaces: 19151916, 10464456
Fits the following GMC Models:
- Savana 1500 | 2001-2002 | Base, SLT | 6 Cyl 4.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L GAS
- Savana 2500 | 2001-2002 | Base, SLT | 6 Cyl 4.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L BI-FUEL, 8 Cyl 5.7 L GAS, 8 Cyl 6.5 L DIESEL
- Savana 3500 | 2001-2002 | Base, SLT | 6 Cyl 4.3 L GAS, 8 Cyl 5.7 L BI-FUEL, 8 Cyl 5.7 L GAS, 8 Cyl 6.5 L DIESEL, 8 Cyl 8.1 L GAS
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GMC Alternator Part Number: 23150508
$190.91 MSRP: $403.57
You Save: $212.66 (53%)
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Product Specifications
- Other Name: Generator Assembly; Generator, Engine Electrical
Fits the following GMC Models:
- Savana 1500 | 2014 | Base, LS, LT | 8 Cyl 5.3 L FLEX
- Savana 2500 | 2014-2017 | Base, LS, LT | 8 Cyl 4.8 L FLEX, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
- Savana 3500 | 2014-2017 | Base, LS, LT | 8 Cyl 4.8 L FLEX, 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS
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GMC Alternator Part Number: 23119515
$241.40 MSRP: $532.38
You Save: $290.98 (55%)
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Product Specifications
- Other Name: Generator Assembly; Generator, Engine Electrical
- Replaces: 15807948
Fits the following GMC Models:
- Terrain | 2013-2017 | Denali, SLE, SLT | 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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GMC Alternator Part Number: 84143541
$251.62 MSRP: $707.04
You Save: $455.42 (65%)
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Product Specifications
- Other Name: Generator Assembly-.; Generator, Engine Electrical
- Replaces: 23298275
Fits the following GMC Models:
- Sierra 2500 HD | 2017-2019 | Base, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL
- Sierra 3500 HD | 2017-2019 | Base, Denali, SLE, SLT | 8 Cyl 6.6 L DIESEL
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GMC Alternator Part Number: 13546926
$164.02 MSRP: $296.86
You Save: $132.84 (45%)
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Product Specifications
- Other Name: Generator Assembly-.; Generator, Engine Electrical
- Replaced by: 13561033
Fits the following GMC Models:
- Acadia | 2023 | Denali, SLE, SLT | 4 Cyl 2.0 L GAS
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GMC Alternator Part Number: 84677896
$245.88 MSRP: $461.74
You Save: $215.86 (47%)
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Product Specifications
- Other Name: Generator Assembly-.; Generator, Engine Electrical
- Replaced by: 85766007
Fits the following GMC Models:
- Yukon | 2021-2022 | AT4, Denali, SLE, SLT | 8 Cyl 5.3 L GAS, 8 Cyl 6.2 L GAS
- Yukon XL | 2021-2023 | AT4, Denali, SLE, SLT | 8 Cyl 5.3 L GAS, 8 Cyl 6.2 L GAS
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GMC Alternator Part Number: 23285091
$312.72 MSRP: $620.71
You Save: $307.99 (50%)
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Product Specifications
- Other Name: Generator Assembly; Generator, Engine Electrical
- Replaces: 22962097
Fits the following GMC Models:
- Terrain | 2011-2012 | SLE, SLT | 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS
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GMC Alternator Part Number: 15225928
$249.93 MSRP: $455.23
You Save: $205.30 (46%)
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Product Specifications
- Other Name: Generator; Generator, Engine Electrical
Fits the following GMC Models:
- Envoy | 2007-2009 | SLE, SLT | 6 Cyl 4.2 L GAS
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GMC Alternator Part Number: 13535009
$269.35 MSRP: $534.64
You Save: $265.29 (50%)
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Product Specifications
- Other Name: Generator Assembly-.; Generator, Engine Electrical
- Replaces: 13517759, 13513070, 13583100
Fits the following GMC Models:
- Terrain | 2018-2024 | AT4, Denali, SL, SLE, SLT | 4 Cyl 1.5 L GAS
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GMC Alternator Part Number: 13540926
$198.85 MSRP: $373.42
You Save: $174.57 (47%)
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Product Specifications
- Other Name: Generator Assembly-.
- Replaced by: 13561036
Fits the following GMC Models:
- Sierra 1500 | 2022-2023 | AT4, AT4X, Denali, Denali Ultimate, Elevation, Pro, SLE, SLT | 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.2 L GAS
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GMC Alternator Part Number: 13534125
$233.85 MSRP: $439.15
You Save: $205.30 (47%)
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Product Specifications
- Other Name: Generator Assembly-.; Generator, Engine Electrical
- Replaced by: 13565646
Fits the following GMC Models:
- Acadia | 2020-2023 | Denali, SLE, SLT | 4 Cyl 2.0 L GAS
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GMC Alternator Part Number: 13553565
$243.08 MSRP: $456.48
You Save: $213.40 (47%)
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Product Specifications
- Other Name: Generator Assembly-.; Generator, Engine Electrical
- Replaced by: 13561040
- Replaces: 13534991
Fits the following GMC Models:
- Canyon | 2023 | AT4, AT4X, Denali, Elevation | 4 Cyl 2.7 L GAS
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GMC Alternator Part Number: 13552649
$243.96 MSRP: $458.14
You Save: $214.18 (47%)
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Product Specifications
- Other Name: Generator Assembly-.; Generator, Engine Electrical
- Replaced by: 13561046
Fits the following GMC Models:
- Yukon | 2023 | Denali, SLE, SLT | 6 Cyl 3.0 L DIESEL
- Yukon XL | 2023 | Denali, Denali Ultimate, SLE, SLT | 6 Cyl 3.0 L DIESEL
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GMC Alternator Part Number: 13539731
$228.57 MSRP: $429.23
You Save: $200.66 (47%)
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Product Specifications
- Other Name: Generator Assembly-.; Generator, Engine Electrical
- Replaced by: 13563316
- Replaces: 13534129, 13598307
Fits the following GMC Models:
- Sierra 1500 | 2020-2022 | AT4, AT4X, Denali, Denali Ultimate, Elevation, SLE, SLT | 6 Cyl 3.0 L DIESEL
- Yukon | 2021-2022 | Denali, SLE, SLT | 6 Cyl 3.0 L DIESEL
- Yukon XL | 2021-2023 | Denali, SLE, SLT | 6 Cyl 3.0 L DIESEL
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GMC Alternator Part Number: 13552630
$235.62 MSRP: $442.49
You Save: $206.87 (47%)
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Product Specifications
- Other Name: Generator Assembly-.; Generator, Engine Electrical
- Replaced by: 13563314
Fits the following GMC Models:
- Savana 2500 | 2021-2024 | Base, LS, LT | 6 Cyl 4.3 L FLEX, 6 Cyl 4.3 L GAS, 8 Cyl 6.6 L GAS
- Savana 3500 | 2021-2024 | Base, LS, LT | 6 Cyl 4.3 L FLEX, 6 Cyl 4.3 L GAS, 8 Cyl 6.6 L GAS
- Sierra 2500 HD | 2020-2023 | AT4, Base, Denali, Pro, SLE, SLT | 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L FLEX, 8 Cyl 6.6 L GAS
- Sierra 3500 HD | 2020-2023 | AT4, Base, Denali, Pro, SLE, SLT | 8 Cyl 6.6 L DIESEL, 8 Cyl 6.6 L FLEX, 8 Cyl 6.6 L GAS
- Yukon | 2023 | AT4, Denali, SLE, SLT | 8 Cyl 5.3 L GAS, 8 Cyl 6.2 L GAS
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GMC Alternator Part Number: 13552639
$240.37 MSRP: $451.40
You Save: $211.03 (47%)
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Product Specifications
- Other Name: Generator Assembly-.; Generator, Engine Electrical
- Replaced by: 13561037
Fits the following GMC Models:
- Sierra 1500 | 2023 | Elevation, Pro, SLE | 4 Cyl 2.7 L GAS
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GMC Alternator Part Number: 84093307
$269.10 MSRP: $487.07
You Save: $217.97 (45%)
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Product Specifications
- Other Name: Generator Assembly; Generator, Engine Electrical
Fits the following GMC Models:
- Acadia | 2017-2021 | SL, SLE, SLT | 4 Cyl 2.5 L GAS
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GMC Alternator Part Number: 13552648
$185.84 MSRP: $349.00
You Save: $163.16 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Generator Assembly-.; Generator, Engine Electrical
- Replaced by: 13561042
Fits the following GMC Models:
- Sierra 2500 HD | 2024 | AT4, AT4X, Denali, Pro, SLE, SLT | 8 Cyl 6.6 L FLEX, 8 Cyl 6.6 L GAS
- Sierra 3500 HD | 2024 | AT4, Denali, Pro, SLE, SLT | 8 Cyl 6.6 L FLEX, 8 Cyl 6.6 L GAS
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GMC Alternator Part Number: 13535007
$307.76 MSRP: $557.03
You Save: $249.27 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Generator Assembly-.; Generator, Engine Electrical
- Replaces: 13522660, 84118122, 84335421
Fits the following GMC Models:
- Terrain | 2018-2020 | Denali, SLE, SLT | 4 Cyl 2.0 L GAS
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GMC Alternator Part Number: 19244782
$269.49 MSRP: $482.94
You Save: $213.45 (45%)
Product Specifications
- Other Name: Generator Assembly, (Remanufacture); Generator, Engine Electrical
- Replaces: 10464084, 19152053
Fits the following GMC Models:
- Jimmy | 1998-2000 | Diamond Edition, Envoy, SL, SLE, SLS, SLT | 6 Cyl 4.3 L GAS
- Safari | 2000-2001 | SL, SLE, SLT | 6 Cyl 4.3 L GAS
- Sonoma | 1998-2000 | SL, SLE, SLS | 6 Cyl 4.3 L GAS
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GMC Alternator

Choose OEM Alternator, you're making the optimal decision for superior quality and perfect performance. You can feel confident because each component goes through stringent quality checks. Every part is carefully built to comply with GMC's factory specifications. You'll enjoy a smooth, worry-free installation that fits just right. At ChevyPartsDeal.com, you'll find it easy to get top-quality OEM GMC Alternator. You can shop at highly competitive prices and protect your budget. All our genuine GMC parts include a dependable manufacturer's warranty. You'll also appreciate our straightforward return policy and swift delivery services for extra convenience.

GMC Alternator maintains the battery alive and all onboard gadgets alive on the road. GMC trucks and SUVs that drivers shuffle off rugged roads and cargo are chosen. The portfolio applies boxed frames, potent motors, and intelligent traction to tow and haul in a non-dramatic manner. Cabins remain silent due to good sealings and noise control hence expeditions are shorter. Blind-zone alerts, hitch guidance technology, and surround vision ensure that nerves are relaxed during parking or towing. MultiPro tailgate is foldable, flips and locks in six positions into ramp or desk. High-end suspension levels even out the ruts without losing steering confidence. Durability test combats rust and rattles annually. Infotainment is updated on air and reflected on phones without problems. The proprietors have faith in the badge as the company reports to work and remains well dressed. GMC maintains ability at the center as well as making comfort natural. The Alternator is attached to the crank of the engine so that a belt rotates its rotor through a magnetic field to produce alternating current which is converted into constant voltage to the battery and all the computers, lights, and stereo on the move, and an internal regulator prevents overcharge or brownout even when revs drop at idle or spike on the highway. A high-output Alternator can be applied in situations where additional lights, winches, or amps can overpower stock output, the high-output Alternator can add amps without overloading wiring or bearings, and drivers can add gear without killing batteries. The longevity of the unit is enhanced when the belt remains tight and the airflow applied in cooling is clear hence indicating trouble at an early stage.

GMC Alternator Parts and Q&A

Alternator
20881337
Q: How to replace the alternator in a 4.3L engine on GMC Sierra 1500?
A:
For replacement of the generator in the 4.3l engine, firstly, detach the negative Battery Cable, and take off the air cleaner outlet resonator. Then, remove the Drive Belt, and remove the engine wiring harness clip from the A/C Compressor/condenser hose bracket, and then, remove the A/C Compressor and condenser hose bracket bolt. Unsrew the heater outlet hose clamp bolt at generator bracket then unscrew the engine wiring harness connector from the generator and shift the engine wiring harness boot. Retract the engine wrire harness nut lead from the generator while removing the generator bolts and repositioning the heater outlet hose and the A/C Compressor/condenser hoses as the generator can be removed from the bracket. For installation, put the generator in the bracket and align the hoses accordingly. Mount the generator bolts and tighten them up to 50 n.m (37 lb ft). Connect the engine wiring harness lead to the generator stud and fix the nut to the generator and tighten it to9 n.m (80 lb in). Connect the electrical connector of the generator to the engine wiring harness boot and position the boot over the generator stud. Install the heater outlet hose clamp bolt at the generator bracket with a torque of 25 n.m(18 lb ft) and the A/C Compressor and condenser hose bracket bolt at the same torque. Replace the engine wiring harness clip to the A/C Compressor/condenser hose bracket, replace the Drive Belt and put everything back, replace the air cleaner outlet resonator and lastly connect the negative Battery Cable again.
Alternator
23279588
Q: How to replace the alternator on GMC Acadia?
A:
To change the Alternator, disconnect the negative Battery Cable and the Drive Belt should be removed as well. Reposition the battery positive junction block cable boot , and remove the battery positive junction block cable from generator nut , then battery positive junction block cable terminal from the generator stud. Now disconnect the engine wiring harness electrical connector from the generator, and take off the power steering reservoir inlet hose clip from the power steering fluid reservoir hose clip bracket. Loct ite the idler pulley bolt and slide the pulley out as far as possible before gen nuts. Next, remove the air conditioning (A/C) compressor/evaporator hose bracket from the left generator stud, and the power steering fluid reservoir hose clip bracket from the right generator stud. Take out the generator and idler pulley from the vehicle, then separate the idler pulley from the generator. Attach the idler pulley on the generator, mount it on a vehicle. Secure the generator to the studs, and attach the power steering hose fluid reservoir clip bracket to the left generator stud and the a/c compressor/evaporator hose clamp bracket to the right generator stud. Fasten generator nuts finger tight and idler pulley bolt also finger tight. The specified generator bolt/nuts are tightened in a sequence as follows; idler pulley bolt, left nut and right nut, to 50n.m (37 lb ft). Reattach the power steering reservoir inlet hose clip to the power steering fluid reservoir hose clip bracket and plug the engine wiring harness electrical connector into the generator. Connect the battery positive junction block cable terminal to the generator stud and tighten the battery positive junction block cableugo the generator nut 22 n.m (16 lb ft). Replace the battery positive junction block cable boot over the stud and on to reinstall the Drive Belt, and at last complete reconnect with the negative Battery Cable.