Identify the vehicle. Retain the restrictions.

2003 GMC Sierra 1500 bearing, hub & seal reference — page 4

Look up 101 BCA catalogue entries for 2003 GMC Sierra 1500. Compare full part references, component roles and recorded restrictions; confirm current vehicle-specific requirements before use.

Source-backed catalogue lookup

Filter by vehicle and component

Vehicle make Vehicle model Model year Component / position

Selections apply immediately. Every result retains the original year range, component position and additional restrictions. The button also works without JavaScript.

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.

Recorded application evidence

Which bearing or hub reference applies?

The catalogue contains 101 reference entries for 2003 GMC Sierra 1500. 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.

All wheel positions Front wheel Rear wheel Engine Transmission Differential Clutch

Reference records

76–100 of 101

“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
NB208BCA catalogue reference	Transfer Case	1999–2007Subject to the conditions in this row	Output Shaft Bearing - Rear [348] with New Process 261C Transfer Case; with Part Time 4WD; 2 Speed	2021 catalogue Page 292Entry 2f44c237
NBB2110BCA catalogue reference	Transfer Case	1999–2007Subject to the conditions in this row	Input Shaft Pilot Bearing - 4WD [348] with New Process 261C Transfer Case; with Part Time 4WD; 2 Speed	2021 catalogue Page 292Entry 15fd3b8b
NBB2110BCA catalogue reference	Transfer Case	2001–2007Subject to the conditions in this row	Input Shaft Pilot Bearing - AWD [348] with New Process 261C Transfer Case; with Part Time 4WD; 2 Speed	2021 catalogue Page 292Entry fe6663aa
NBB5020BCA catalogue reference	Transfer Case	1999–2007Subject to the conditions in this row	Output Shaft Pilot Bearing - Rear [303] with New Process 246 Transfer Case; with Full Time 4WD; 2 Speed	2021 catalogue Page 292Entry 006066d2
NBB5020BCA catalogue reference	Transfer Case	1999–2007Subject to the conditions in this row	Output Shaft Pilot Bearing - Rear - 4WD [348] with New Process 261C Transfer Case; with Part Time 4WD; 2 Speed	2021 catalogue Page 292Entry 8eb25642
NBB5020BCA catalogue reference	Transfer Case	2001–2007Subject to the conditions in this row	Output Shaft Pilot Bearing - Rear - AWD [348] with New Process 261C Transfer Case; with Part Time 4WD; 2 Speed	2021 catalogue Page 292Entry 3d1c2a1c
NBJ2416BCA catalogue reference	Transfer Case	1999–2007Subject to the conditions in this row	Output Shaft Pilot Bearing - Front [303] with New Process 246 Transfer Case; with Full Time 4WD; 2 Speed	2021 catalogue Page 292Entry 11475e74
NS341022BCA catalogue reference	Transfer Case	1999–2007Subject to the conditions in this row	Oil Pump Housing Seal - 4WD [303] with New Process 246 Transfer Case; with Full Time 4WD; 2 Speed	2021 catalogue Page 292Entry 85370b2d
NS341022BCA catalogue reference	Transfer Case	2001–2007Subject to the conditions in this row	Oil Pump Housing Seal - AWD [303] with New Process 246 Transfer Case; with Full Time 4WD; 2 Speed	2021 catalogue Page 292Entry 442c9929
NS710495BCA catalogue reference	Transfer Case	1999–2007Subject to the conditions in this row	Output Shaft Seal - Front [348] with New Process 261C Transfer Case; with Part Time 4WD; 2 Speed	2021 catalogue Page 292Entry 9e8f99eb
NS710496BCA catalogue reference	Transfer Case	1999–2004Subject to the conditions in this row	Output Shaft Seal - Rear [314] Boot Type; with 1.400 (in) Width; with New Process 246 Transfer Case; with Full Time 4WD; 2 Speed	2021 catalogue Page 290Entry ff4fcae5
NS710496BCA catalogue reference	Transfer Case	2001–2004Subject to the conditions in this row	Output Shaft Seal - Rear [828] Boot Type; with 48 (mm) Shaft; with New Process 261C Transfer Case; with Part Time 4WD; 2 Speed	2021 catalogue Page 290Entry 8e9fa4f5
NS710597BCA catalogue reference	Transfer Case	1999–2007Subject to the conditions in this row	Shift Shaft Seal [303] with New Process 246 Transfer Case; with Full Time 4WD; 2 Speed	2021 catalogue Page 292Entry 886c0c33
NS710597BCA catalogue reference	Transfer Case	1999–2007Subject to the conditions in this row	Shift Shaft Seal [348] with New Process 261C Transfer Case; with Part Time 4WD; 2 Speed	2021 catalogue Page 292Entry b43ed45d
NS99139BCA catalogue reference	Transfer Case	1999–2007Subject to the conditions in this row	Output Shaft Repair Sleeve - Front [303] with New Process 246 Transfer Case; with Full Time 4WD; 2 Speed	2021 catalogue Page 292Entry 8ce6d30f
NS99225BCA catalogue reference	Transfer Case	1999–2007Subject to the conditions in this row	Oil Pump Housing Repair Sleeve - 4WD [303] with New Process 246 Transfer Case; with Full Time 4WD; 2 Speed	2021 catalogue Page 292Entry 2bf6f527
NS99225BCA catalogue reference	Transfer Case	2001–2007Subject to the conditions in this row	Oil Pump Housing Repair Sleeve - AWD [303] with New Process 246 Transfer Case; with Full Time 4WD; 2 Speed	2021 catalogue Page 292Entry a5333567
WE60826BCA catalogue reference	Wheel-Front	2002–2006Subject to the conditions in this row	Bearing and Hub Assembly - 4WD; 4-Wheel ABSNo additional numbered footnote is attached to this source row.	2021 catalogue Page 296Entry dcaf50e4
WE60826BCA catalogue reference	Wheel-Front	2002–2006Subject to the conditions in this row	Bearing and Hub Assembly - AWD; 4-Wheel ABSNo additional numbered footnote is attached to this source row.	2021 catalogue Page 296Entry a8fdd4cb
WE60912BCA catalogue reference	Wheel-Front	1999–2004Subject to the conditions in this row	Bearing and Hub Assembly - RWDNo additional numbered footnote is attached to this source row.	2021 catalogue Page 296Entry 266166a6
NBRP1561GMBCA catalogue reference	Wheel-Rear	2001–2007Subject to the conditions in this row	Bearing [687] with 9.5 (in) Ring Gear; 3.0876 (in) O.D.; Axle Repair Bearing	2021 catalogue Page 303Entry 62870633
NBRP513067BCA catalogue reference	Wheel-Rear	1999–2014Subject to the conditions in this row	Bearing [1921] 2.842 (in) O.D.; Axle Repair Bearing	2021 catalogue Page 303Entry d3a70866
NS4762NBCA catalogue reference	Wheel-Rear	2001–2007Subject to the conditions in this row	Seal [818] with 8.625 (in) Ring Gear	2021 catalogue Page 303Entry 07a33ac5
NS710105BCA catalogue reference	Wheel-Rear	2001–2007Subject to the conditions in this row	Seal [254] with 9.5 (in) Ring Gear	2021 catalogue Page 303Entry e5696e2a
WE60690BCA catalogue reference	Wheel-Rear	1999–2015Subject to the conditions in this row	Bearing [445] with 8.50 (in) or 8.625 (in) Ring Gear	2021 catalogue Page 303Entry 24d16948

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

Wheel and hub identification checklist →Investigate wheel bearing noise →Engine and shell-bearing principles →Replacement evidence checklist →Query an actual bearing designation or dimension →

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.