Product Attributes
| Rated output | 12V 150A |
| Pulley | 6PK |
| Size | 24*18*17 CM single unit inner box |
| Weight | net weight: 5.9KG gross weight: 6.3KG |
| Packaging | Neutral kraft paper packaging |
| Spot/Pre sale | Spot goods |
| Warranty | 1 year |
Product Details
| Type | AC generator Alternator |
| Specification | 12V 150A |
| Pulley | 6PK |
| Brand | nuojin |
| Part Number | 84143542, 84143543 |
| Quality | new |
| Delivery time | 10 days |
Product Overview
The 84143542 is a GM OE-spec replacement alternator delivering 12V 150A output with a 6-rib (6PK) pulley, engineered for GMC Sierra, GMC Yukon and Yukon XL and Chevrolet Silverado full-size truck and SUV platforms. This aftermarket unit matches the original charging-system specification of these GM full-size vehicles.
Fitted with internal regulator design, this brand-new alternator is stocked in-house with a 1-year warranty and 10-day dispatch lead-time. The 150-amp rating is factory-correct for the stock electrical load of these vehicles, supporting climate control, heated and powered accessories, infotainment, trailer towing electrical demand and the battery-charge management strategy.
Key physical specs: net weight 5.9 kg, gross weight 6.3 kg, overall dimensions 240 x 180 x 170 mm, supplied inside neutral kraft inner carton.
The GM Full-Size Truck and SUV Platform and 150A Charging System
The GMC Sierra, Yukon, Yukon XL and Chevrolet Silverado share the GM full-size truck and SUV architecture, which carries a substantial factory electrical load including infotainment, heated and powered accessories and trailer-towing electrical demand. This is why the charging system is rated at 150A rather than a lower output.
This unit is specified as 12V 150A, matching the factory charging-system specification of these platforms. The 6-rib pulley matches the original accessory-belt layout, driving alternator, water pump and power-steering pump. Installing a pulley with the wrong rib count will cause belt mis-tracking, slippage, premature belt wear and charging faults. Always cross-check against your old alternator before ordering.
Technical Specifications
| Parameter | Specification |
|---|
| GM OE numbers | 84143542, 84143543, 22747896, 22747894, 23487088, 23487089 |
| Reference/OEM cross | 1042118340, 1042118350, 1042119110, 1042119720, TN1042119110, TN1042119720, 11785, 14007 |
| Voltage | 12V |
| Amperage | 150A |
| Pulley | 6-rib fixed pulley (6PK) |
| Regulator | Internal |
| Engine | Full-size truck / SUV (verify engine code) |
| Quality | NEW |
| Warranty | 1 year |
| Net Weight | 5.9kg |
| Gross Weight | 6.3kg |
| Dimensions | 240 x 180 x 170mm |
| Packaging | Neutral kraft box |
| Lead Time | 10 days, in stock |
Engine Compatibility and Cross Reference
This alternator fits GMC Sierra, GMC Yukon and Yukon XL and Chevrolet Silverado full-size platforms. Do not rely solely on vehicle model name for fitment validation; always verify engine code, old-part OE number, pulley rib-count and amp label on your original alternator.
| Make / Model | Type | Notes |
|---|
| GMC Sierra | Full-size pickup | Verify engine code and mounting layout |
| GMC Yukon / Yukon XL | Full-size SUV | Verify engine code and mounting layout |
| Chevrolet Silverado | Full-size pickup | Verify engine code and mounting layout |
Multiple GM and supplier OE numbers appear across production batches and regional market specifications for this same alternator family. If your original unit bears one of the listed cross-reference numbers, 84143542 serves as a direct drop-in replacement.
What to Look for in a Replacement
Follow these five verification steps before placing your order to avoid wrong-part returns:
1. Check the amperage label on your old alternator: confirm it is rated for 150A. Different amp ratings are not interchangeable.
2. Count pulley ribs: this unit requires 6PK (6-rib). Units with a different rib count are incompatible for this accessory drive setup.
3. Confirm the exact model and engine code of your Sierra, Yukon or Silverado.
4. Match against OE / reference part numbers stamped on your original housing.
5. Weight cross-check: genuine matching unit weighs approximately 5.9 kg net; significant weight difference indicates wrong assembly.
Application Scenarios
Independent repair shops and GM specialists servicing Sierra, Yukon and Silverado models across North America, Europe, Asia-Pacific, Latin-America and the Middle East.
Parts counters and jobbers stocking GM full-size truck and SUV replacement electrical components.
Vehicle owners restoring and maintaining original-spec GMC and Chevrolet models.
Fleet and towing operators maintaining GM pickup and SUV charging systems.
Owners with standard accessory loads who require a factory-spec charging system.
Note: For vehicles with heavy aftermarket upgrades such as multiple auxiliary lights, winches, high-watt audio or additional accessories, evaluate whether an upgraded high-output alternator will be required instead of this stock-spec 150A unit.
FAQ
Q: Which vehicles does this alternator fit?
A: It fits GMC Sierra, GMC Yukon and Yukon XL and Chevrolet Silverado full-size platforms. Always verify against the OE number, pulley and mounting layout of your original alternator before ordering.
Q: Is this alternator new?
A: Yes, this is a brand-new unit with a 1-year warranty and 10-day dispatch lead-time.
Q: My old alternator shows OE number 22747896 or 23487088, will 84143542 work?
A: Yes. These numbers belong to the same alternator family, differing only by production revision and market specification. It serves as a direct replacement.
Q: What is the normal charging voltage after installation?
A: At idle, battery terminal voltage should read 14.0V-14.7V. If below 13.8V or above 15V, shut off the engine immediately and inspect.
Q: What is your warranty and lead-time?
A: Goods are in stock with a 10-day dispatch lead-time. A 1-year warranty applies from installation date; warranty excludes damage caused by mis-installation, wrong belt tension, or vehicle-wiring faults.
In Practice
For technicians working on GM full-size platforms: The core principles include power-off safety, alignment of shaft centers, torque compliance, correct wiring, proper belt tension and power-on verification, to prevent burnout, abnormal noise, failure to generate power or premature bearing damage.
Preparation: Prepare a socket wrench set, torque wrench, belt tensioner tool, multimeter and medium-strength thread locker. Verify that the new alternator OE number, model and pulley specifications match the original vehicle. A 150A output requires a charge cable of 10 AWG or larger. Turn off the engine and allow it to cool, disconnect the negative battery terminal and move the cable end away from metal components. Take photos of belt routing, wiring terminal positions and mounting bolt layout.
Removal: Rotate the tensioner pulley counterclockwise with a tensioner tool, relieve tension and remove the belt. Unplug the connector or harness, loosen the B+ (or BAT) terminal nut, remove the heavy-gauge charge cable and label it. Remove the mounting bolts from the bracket, take out the old alternator and clean the bracket and mounting surface of oil, rust and burrs.
Installation: Seat the new alternator, align with bracket holes, install the mounting bolts and hand-tighten to allow adjustment. Ensure the alternator pulley is coplanar with the crankshaft and water pump pulleys with no misalignment. Route the belt per the original path, reset the tensioner and release it; pressing the belt midpoint should give a deflection of 10-15 mm. Tighten mounting bolts with a torque wrench to 28-32 N.m for most Chevrolet and GMC models, referring to the vehicle manual, and apply a thin coat of medium-strength thread locker to threads for vibration resistance.
Wiring: Connect the heavy-gauge charge cable (10 AWG or larger) to the B+ or BAT terminal and tighten the nut, cleaning terminals for secure contact. Connect the field or control wire to the F or IGN terminal and reinsert the connector per labels; reverse polarity is prohibited as it will destroy the voltage regulator. Route wires away from high-temperature areas and rotating components, and secure harnesses to prevent abrasion and entanglement.
Testing: Reconnect the negative battery terminal, start the engine and let it idle for 3-5 minutes. Listen for abnormal noises such as bearing squeal or belt slip. Measure battery terminal voltage with a multimeter: the normal idle range is 14.0V-14.7V. If below 13.8V or above 15V, shut off the engine immediately and inspect wiring, belt tension or the alternator itself. For vehicles with smart charging or BMS, use an OBD scanner to perform alternator initialization and BMS calibration, otherwise the system will fail to recognise charging status correctly. After shut-off, verify bolts and wiring are secure.
Prohibited: Do not strike the alternator housing, pulley or shaft end with a hammer; this may damage the rotor, stator windings or one-way clutch mechanism. The charge cable of this 150A alternator must be connected directly to the positive battery terminal with no intermediate adapters or splices, to prevent terminal overheating and fire hazards. For individuals without auto-electric repair experience, especially for models requiring smart-system calibration, entrust installation to a professional repair shop.
References
The installation procedure and precautions are compiled from general Chevrolet / GMC alternator repair practice, based on GM OE Workshop Service Manuals and Electronic Parts Catalogs, industry-standard requirements for 150A high-output alternators (10 AWG charge cable, OBD calibration for BMS-equipped vehicles), accepted voltage acceptance ranges (14.0V-14.7V), belt deflection specifications (10-15 mm) and typical torque values from popular Chevrolet and GMC models, cross-checked against actual vehicle installation tests and after-sales maintenance experience.
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