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The short version
- The 4WD GMC Jimmy wheel bearing hub for 1998-2005 is 513124, a single number across those years.
- Earlier 4WD trucks split further. That is 513061 for 1991 four-door through 1997, and 513013 for 1990 and the 1991 two-door.
- The 2WD Jimmy splits by era up front: 1998-2005 trucks use sealed hub SP450300 with sensor kit SK450300, while 1990-1997 trucks use a serviceable tapered set, SET6 inner and SET34 outer with seal 4739, or 8871 for 1990.
- The rear bearing is 5707 on rear wheel drive trucks. The seal is chosen by the axle code stamped at the factory, not by model year.
GMC built the Jimmy in two very different front end designs depending on drivetrain. That trips up a lot of parts lookups.
Two wheel drive trucks kept the older serviceable bearing and race setup through 1997, then moved to a sealed hub of their own. Four wheel drive trucks used a sealed hub that changed twice more before 2005.
GMC Jimmy wheel bearing numbers at a glance
The most current GMC Jimmy wheel bearing hub is 513124. It covers every four wheel drive truck from 1998 through the end of production in 2005.
Earlier four wheel drive Jimmys use different numbers, and every two wheel drive Jimmy uses a different design entirely. Both are covered in the table below.
GMC Jimmy wheel bearing part numbers
| Years | Detail | Number |
|---|---|---|
| 1998-2005 | Front hub, 4WD | 513124 check price |
| 1991-1997 | Front hub, 4WD, 4-door (1991 on) | 513061 check price |
| 1990-1991 | Front hub, 4WD, 1990 and 1991 2-door | 513013 check price |
| 1998-2005 | Front hub, 2WD, with sensor kit SK450300 | SP450300 check price |
| 1990-1997 | Front inner cone, 2WD serviceable | SET6 check price |
| 1990-1997 | Front outer cone, 2WD serviceable | SET34 check price |
| 1991-1997 | Front seal, 2WD serviceable | 4739 check price |
| 1990 | Front seal, 2WD serviceable | 8871 check price |
| 1992-2005 | Rear bearing, RWD | 5707 check price |
| 1992-2005 | Rear seal, axle code K (Canada) | 8660S check price |
| 1992-2005 | Rear seal, axle code C (USA) | 710166 check price |
Every model year this chart resolves: 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 and 2005.
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Lookups run through the cross reference page.
The rear seal is not chosen by model year. It is chosen by the axle code stamped on the axle housing at the plant.
Code K, used in Canada, takes 8660S. Code C, used in the United States, takes 710166. Check the stamped code before ordering a rear seal.
Shared with the Blazer and S10
The compact Jimmy shared its S15 platform with the Chevrolet Blazer and the Chevy S10 pickup. All three used the same bearing hardware within a given drivetrain and model year.
A shop pulling a GMC Jimmy wheel bearing part can typically cross shop the S10 and Blazer listings for the same years. The hardware did not change between badges.
Two wheel drive versus four wheel drive duty
Two wheel drive Jimmys through 1997 carry the older, driver serviceable bearing design. It needs periodic repacking rather than a swap and forget hub, and from 1998 the 2WD trucks moved to the sealed SP450300 hub instead.
Four wheel drive trucks carry more static weight over the front axle and use the sealed hub design instead. It is simpler to replace but is not serviceable in the field. Anyone comparing the two can start from the GMC hub.
Diagnosing a GMC Jimmy wheel bearing
- Listen for a rhythmic hum. A worn GMC Jimmy wheel bearing produces a growl or hum that rises and falls with road speed.
- Check for a change in a turn. Bearing noise usually gets louder turning away from the bad side and quieter turning toward it.
- Jack up the corner and check for play. On 4WD trucks a loose hub points to bearing wear. On 2WD trucks, repacking and adjusting the serviceable set sometimes fixes the play.
- Spin the wheel by hand. Roughness, grinding, or clicking while spinning free points to a damaged race or cone.
- Rule out other causes before replacing. Worn CV joints on 4WD front axles and worn U-joints at the rear can both mimic bearing noise.
Common questions
What is the 4WD GMC Jimmy wheel bearing hub number for 1998 to 2005?
513124, covering every four wheel drive truck from 1998 through the end of production.
Does the 2WD Jimmy use a sealed hub bearing?
Only from 1998, when the 2WD trucks got sealed hub SP450300 with sensor kit SK450300. The 1990-1997 trucks use a serviceable tapered set: inner cone SET6, outer cone SET34, and seal 4739, with seal 8871 for 1990 only.
How is the rear seal chosen?
By the axle code stamped on the housing, not by year. Code K takes 8660S and code C takes 710166.
Do the Blazer and S10 share the same bearings as the Jimmy?
Yes, all three rode on the same S15 platform. They used the same hardware within a given drivetrain and model year.
What changed on 4WD trucks between 1990 and 1997?
513013 covers 1990 and the 1991 two-door. 513061 covers the 1991 four-door through 1997, before 513124 takes over in 1998.