2004 GMC Sierra 2500 bearing, hub & seal reference
Look up 76 BCA catalogue entries for 2004 GMC Sierra 2500. Compare full part references, component roles and recorded restrictions; confirm current vehicle-specific requirements before use.
Filter by vehicle and component
What this lookup establishes—and what it does not
Source: BCA 2021 Wheel Hub Assembly, Bearing and Seal Catalog. The loaded entries cover listed model years from 1995 through 2020. This is a historical catalogue reference, not a live VIN decoder or a guarantee for every trim, market or production date.
BCA is an NTN-owned product line. The numbers below remain BCA part references; they are not silently converted into NTN, SKF or another brand's part numbers. Confirm current OEM/service requirements before use.
Which bearing or hub reference applies?
The catalogue contains 76 reference entries for 2004 GMC Sierra 2500. Select the year and component, then read the full condition and footnote fields. There is no single universal bearing number for every support in this vehicle.
Reference records
1–25 of 76“Bearing”, “hub assembly”, “seal” and “repair sleeve” describe different components. The source description, rather than the catalogue title, determines the role of each number.
On a phone, each record is shown as a complete card with its restrictions. These records do not supply tightening torques or certify a replacement.
| BCA part reference | Component / position | Source model years | Recorded conditions & restrictions | Source trace |
|---|---|---|---|---|
| NS2457BCA catalogue reference | Automatic Transmission | 1999–2004Subject to the conditions in this row | Extension Housing Seal - 4L80-E Trans.; Automatic Trans.; 4 Speed Trans
| 2021 catalogue Page 260Entry 6ad26a32 |
| NB382ABCA catalogue reference | Axle | 1999–2004Subject to the conditions in this row | Differential Bearing Race - Rear
| 2021 catalogue Page 262Entry 9a76e422 |
| NB387ASBCA catalogue reference | Axle | 1999–2004Subject to the conditions in this row | Bearing - Rear
| 2021 catalogue Page 262Entry d6a89395 |
| NBA42BCA catalogue reference | Axle | 1999–2004Subject to the conditions in this row | Bearing - Rear
| 2021 catalogue Page 262Entry 66f7912f |
| NBA50BCA catalogue reference | Axle | 2003–2004Subject to the conditions in this row | Bearing - Rear
| 2021 catalogue Page 262Entry 399c7bb4 |
| NBDRK327MKBCA catalogue reference | Axle | 2001–2004Subject to the conditions in this row | Differential Bearing and Seal Kit - Rear
| 2021 catalogue Page 262Entry 73806402 |
| NBRA324BBCA catalogue reference | Axle | 1999–2004Subject to the conditions in this row | Differential Bearing and Seal Kit - Rear
| 2021 catalogue Page 262Entry b4de8120 |
| NBRA324BMKBCA catalogue reference | Axle | 1999–2004Subject to the conditions in this row | Differential Bearing and Seal Kit - Rear
| 2021 catalogue Page 262Entry 853116c4 |
| NBRA325BBCA catalogue reference | Axle | 1999–2004Subject to the conditions in this row | Differential Bearing and Seal Kit - Rear
| 2021 catalogue Page 262Entry a7c20692 |
| NBRA325BMKBCA catalogue reference | Axle | 1999–2004Subject to the conditions in this row | Differential Bearing and Seal Kit - Rear
| 2021 catalogue Page 262Entry 549b6be4 |
| NB614174BCA catalogue reference | Clutch | 2001–2004Subject to the conditions in this row | Release Bearing
| 2021 catalogue Page 267Entry 9fce1edf |
| NBHM803110BCA catalogue reference | Differential | 2003–2004Subject to the conditions in this row | Pinion Race - Rear Inner
| 2021 catalogue Page 272Entry 33124437 |
| NBHM803146BCA catalogue reference | Differential | 2003–2004Subject to the conditions in this row | Pinion Bearing - Rear Inner
| 2021 catalogue Page 272Entry dc5af37e |
| NBHM804810BCA catalogue reference | Differential | 1999–2004Subject to the conditions in this row | Pinion Race - Front Inner
| 2021 catalogue Page 271Entry 3c602b77 |
| NBHM804810BCA catalogue reference | Differential | 1999–2004Subject to the conditions in this row | Pinion Race - Rear Inner
| 2021 catalogue Page 271Entry 09001194 |
| NBHM804846BCA catalogue reference | Differential | 1999–2004Subject to the conditions in this row | Pinion Bearing - Front Inner
| 2021 catalogue Page 271Entry 645df83f |
| NBHM804846BCA catalogue reference | Differential | 1999–2004Subject to the conditions in this row | Pinion Bearing - Rear Inner
| 2021 catalogue Page 271Entry 2dc5cbc4 |
| NBHM88510BCA catalogue reference | Differential | 2003–2004Subject to the conditions in this row | Pinion Race - Rear Outer
| 2021 catalogue Page 272Entry d6a758f0 |
| NBHM88542BCA catalogue reference | Differential | 2003–2004Subject to the conditions in this row | Pinion Bearing - Rear Outer
| 2021 catalogue Page 272Entry a280b5c5 |
| NBHM88610BCA catalogue reference | Differential | 2004Subject to the conditions in this row | Pinion Race - Front Outer
| 2021 catalogue Page 272Entry 51cbea3b |
| NBHM88610BCA catalogue reference | Differential | 2004Subject to the conditions in this row | Pinion Race - Rear Outer
| 2021 catalogue Page 272Entry ee80dc93 |
| NBHM88649BCA catalogue reference | Differential | 2004Subject to the conditions in this row | Pinion Bearing - Front Outer
| 2021 catalogue Page 272Entry b6524c22 |
| NBHM88649BCA catalogue reference | Differential | 2004Subject to the conditions in this row | Pinion Bearing - Rear Outer
| 2021 catalogue Page 272Entry 7a12317c |
| NBHM903210BCA catalogue reference | Differential | 1999–2004Subject to the conditions in this row | Pinion Race - Rear Inner
| 2021 catalogue Page 271Entry 71c5eb4f |
| NBHM903249BCA catalogue reference | Differential | 1999–2004Subject to the conditions in this row | Pinion Bearing - Rear Inner
| 2021 catalogue Page 271Entry 0ad883b2 |
Checks before treating a reference as a replacement
Identify the complete vehicle
Match model year, engine, transmission, driven axle, body and production/VIN limits. A year and model name alone may leave several valid-looking entries.
Match the component role
Distinguish a loose bearing, complete hub, cup/cone, seal and repair sleeve. Check front/rear and inner/outer or left/right position exactly as recorded.
Preserve vehicle-specific interfaces
Confirm encoder/ABS arrangement, flange and spline interfaces, retention and the current service procedure. Do not transfer torque or installation force from an unrelated part.
How to use these results
Does a listed number guarantee fitment for my VIN?
No. These are source-listed catalogue references. Read every restriction and verify the current OEM and manufacturer information for the exact vehicle configuration. Missing VIN or production details remain unknown.
Can I replace a hub using a bearing with the same dimensions?
Not on dimensions alone. The complete assembly, encoder, retention, loading and installation interfaces must agree. The main bearing catalogue and cross-brand comparisons are separate dimensional references, not vehicle approvals.
Where are the axle-nut torque and installation instructions?
This application catalogue does not establish a universal torque or a complete installation sequence. Use the current vehicle-specific service procedure, including fastener reuse rules and staged tightening. Do not infer torque from the bearing number.
Does wheel noise prove that one of these parts has failed?
No. Bearing damage, tyres, brakes and driveline faults can produce overlapping symptoms. A reference lookup identifies candidates; it does not diagnose the cause or prove which side has failed.
Look up an exact source part number
Keep the BCA prefix and full marking. Similar numbers from other manufacturers are not automatically cross-references.
Continue the technical investigation
Source and interpretation limits
Factual reference basis: BCA 2021 Wheel Hub Assembly, Bearing and Seal Catalog, published by BCA Bearings, an NTN product line, with its linked numbered footnote reference. Each row retains its source page and restrictions. Vehicle names shared by one source entry remain associated with that entry; source counts are not quantities for sale.
BearingScope provides independently organized technical lookup and interpretation. It does not sell these parts, provide a repair service, certify current fitment, or claim that an absent result is unavailable from a manufacturer. Original public catalogue files and source fingerprints are retained in the site's verification records.