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The short version
- An Envoy wheel bearing at the front is cited as 513188 across the whole 2002 to 2009 run, one number, no splits.
- The same number is cited for the Chevrolet TrailBlazer, Buick Rainier, Saab 9-7x and Isuzu Ascender.
- Five badges, one hub. Worth knowing when a listing looks scarce.
- The rear is a solid axle, so it is a different job entirely from the front.
General Motors built one mid size truck platform and sold it under five names. Two of those badges were Saab and Isuzu.
The hub never changed. So a part listed for a vehicle you have never owned is very often the part you need.
One hub, five badges
The catalog lists it under the TrailBlazer, Rainier, 9-7x and Ascender as well as this vehicle.
None of those is an equivalent part. They are the same part.
The practical use is supply and price. Search the number rather than the badge, and the field widens considerably.
The TrailBlazer version is on the TrailBlazer page. Cross referencing is on the cross reference page.
Envoy wheel bearing part numbers
| Years | Detail | Number |
|---|---|---|
| 2002 to 2009 | Front | 513188 check price |
| 2010 to 2017 | Front, later platform | 513288 check price |
Every model year this chart resolves: 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 and 2017.
Price links lead to Amazon searches for that number. As an Amazon Associate this site earns from qualifying purchases.
No engine split, no drivetrain split at the front, no build date trap. One number does the whole run.
The rear is a different vehicle
The rear runs a live axle. The bearing sits in the axle tube, so the shaft has to come out to reach it.
That is a longer job involving the differential, and nothing about it resembles the front.
Solid axle work is on the rear replacement page.
The sensor lives in the hub
The wheel speed sensor is built into the front unit. On these trucks it fails independently of the bearing.
The result is an ABS light, sometimes a traction fault, and no noise. The fix is the same unit either way.
Those are on the ABS light page and the sensor page.
Weight and towing
This is a body on frame truck, heavier than the crossovers it competed against. The front hubs carry that difference every mile.
A conventional hitch sits behind the rear axle and levers load forward. That adds to what the front carries.
Those are on the vehicle weight page and the towing page. The make overview is on the GMC page.
Diagnosing an Envoy wheel bearing
- Check for an ABS light first, since the sensor is inside the front hub.
- Weave at road speed and note which side loads the noise.
- Rock the front wheel at twelve and six.
- Listen at the rear separately, because it is a different design.
- Compare hub heat across the front axle after a drive.
Those are on the checking page and the tire noise page.
Common questions
Which Envoy wheel bearing do I need?
513188 is cited for the front across 2002 to 2009. Confirm against your own part.
Can I buy a part listed for a TrailBlazer?
The catalog cites the same number for both. Check the number rather than the badge.
What about a Saab 9-7x listing?
Also 513188. It is the same platform under a different badge.
Why is the rear so different?
It uses a solid axle with pressed bearings rather than a bolt on unit.
ABS light but no noise?
That points at the speed sensor inside the front hub rather than the bearing.
Do I need a press for the front?
No. The front is four bolts and an axle nut.
Should I do both fronts?
Only what is worn, though on a high mileage truck the second often follows.