The front Wheel Bearing on the driver’s side of this GMC Envoy needed to be replaced. The front wheel was visibly shaking and it would make a grinding noise while driving down the highway. At this point I decided to replace both of the front wheel bearing cartridges since I have already done both rears and needed to do the front drivers side. I did not think it wise to leave one old bearing on the car. For $50 bucks the customer agreed. So I purchased these bearing cartridges and set about installing them in the Envoy.
You will want to start by taking a little weight off the front wheel but leaving the wheel touching the ground. Pop off the wheel cap and loosen the lug nuts. You will also want to take this opportunity to loosen the drive axle bolt that is connected to the drive axle as well. I used a monster 36mm socket and a breaker bar to break the bolt. If you wait until the wheel is in the air, you will have the problem of the wheel turning while you are trying to loosen it.
Remove The Wheel Cap
Loosen The Lug Nuts
Loosen The Axle Nut
At this point you can jack up the truck all the way and put the jack stands in place. I put them right on the frame rail so that I will not do any damage to the body. Remove the wheel from the vehicle.
Now you will remove the brake calipers. For more detail on how to do this, check this post from doing the brakes on a 2007 GMC Envoy. There are 2 18mm bolts that need to be removed to take the caliper off. The disc brake rotor will then slide right off.
Brake Caliper And Rotor Removed
There is an ABS sensor that comes with the cartridge. You will want to disconnect the old one and remove all of the routing that is present for the wires. The cartridge that I purchased came with all the plastic ends so I just ripped out the old ones. If yours does not, you will need to use caution so that you do not break the plastic clips.
This Is The ABS Sensor Connector, You Can See The Wires Going To The Right Of It
The Top Wire Is The ABS Sensor Wire
There are 3 18mm bolts that hold the bearing cartridge in the bore. Remove the 3 bolts. I used a combination of a ratchet, a regular box wrench, and a flex extension to get the bolts out. Once the bolts are out, you can use a slide hammer with the appropriate attachment to remove the cartridge. If you don’t have a slide hammer, you can use the method described in the review of the Basic Auto Mechanic’s class that I am taking, which tells you how to use the brake rotor installed backwards as a slide hammer. The slide hammer is the way to go, 2 hits and it was out! To my surprise, the brake dust shield came right off as well!
You Can See Two Of The Bolts In The Picture, The Third Is In A Triangular Pattern Behind The CV Joint
I Used The Shown Attachment On The Slide Hammer To Pull Out The Cartridge
After Successful Removal Of Wheel Bearing
To put the new one in, you will need to route the new ABS sensor wires through the brake dust shield and out of the way. Slide the Axle into the slot on the cartridge so you can position the cartridge in the bore. Then you can start the bolts back in. Turn each bolt a couple of turns and move to the next one, this will slowly pull the cartridge back into the bore. You will want to keep alternating between the 3 bolts until the cartridge is in tight. When the bolts are tight you will want to torque them to 76 foot pounds.
Route The ABS Sensor Through The Hole In The Dust Sheild
Use The Bolts In A Pattern To Pull The Cartridge Into The Bore
When the bolts have been torqued down, you will want to route the ABS sensor wires to their proper locations and connect the sensor. Put the axle nut on the end of the axle and make it snug. Reinstall the rotor and the brake calipers.
Make The Axle Nut Snug
Reinstall The Brake Rotor
Reinstall The Brake Caliper
Put the wheel back on and make the lug nuts snug. Remove the jack stands and lower the truck so there is some weight on the tire. At this point you will want to torque the axle nut to 103 foot pounds. Tighten all the lug nuts and you should be good to go!
Torque The Axle Nut To 103 ft/lbs