What is the name of the fiberglass body panel that forms the lower portion of each rear wheelwell and acts as the "corner" of the rear bumper on each side of a 99 Bravada or similar GM SUV? This fiberglass part sits below the back 1/2 of the rear quarterpanel and is color keyed to the vehicle body paint. The rear bumper fits "inside" of this part, not extending around to it.

There would be two relay's , one for front an one for the back . And the relay would be for high speed only . And it just so happens there are two AUX blower motor relay's .
Auxiliary Blower Motor Relay C403
Left rear corner of vehicle, above wheelwell
Auxiliary High Blower Motor Relay C404
Left rear corner of vehicle, above wheelwell

Front blower motor relay - K73 top left , Six relay's at top left .


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Unbolt it

these bumpers are hard to repair, most places replace the bumpers because of the problems trying to repair them. you can try a body shop that specializes in fiberglass corvettes they might have the best method.

There are some steps that help you to easily remove Front Bumper :
1. Open the hood of your car.
2 . Look under the edge of the front of the car at the end of the bumper.
Pull the plastic shield down out of the way if it doesn't come off completely. Reach behind the bumper at each corner and you should find a bolt holding the corner of the bumper to the car. Remove these bolts. The bumper should come off.
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Support the bumper with a jack, disconnect any electrical wires to license plate light, then loosen and remove the bolts that hold the bumper to the frame. Slowly back the jack up and lower it so the bumper can now rest on the floor.

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Remove all eight small set screws (4) on each side in the fender wheel wells. Then remove the four secure bolts on undercarriage of bumper (4). Take a screw driver. (flathead) to the upper portions of both the left and right side of the bumper. Be careful....... These are extremely fragile and you may need to replace them before replacing the bumper. Then comes a bit unnerving part. Removal of the bumper........ (This scarred the **** out of me!!!!) just grab ahold of one of the corners, then gradually pull! That's it. The clips will come out gradually and evenly.

Rear filler panel.

Front

1. Note the radio security code, then disconnect the negative battery cable.
   
2. Remove the bolt from the lower part of the bumper just in front of the wheel opening, and remove the self-tapping screw from the rear most portion of the bumper at the forward portion of the front wheel well.
   
3. On V6 Odyssey models, perform the following:
   
   • Remove the grille.
     
   • Remove the pins and clips from the lower front of the bumper.
     
4. On 4-cylinder Odyssey models, remove the bolts from the left and right side lower brackets for the bumper at the ends of the lower air intake.
   
5. Pull the ends of the bumper outward.
   
6. Have an assistant help guide the bumper up and away from the vehicle.
   
7. Installation is the reverse of the removal procedure.
   

Jack the car up and put it on jack stands. Disconnect fasteners retaining the splash apron under the radiator. These form part of the wheelwells on each side. Remove the fascia where it is attached to the fenders. Each side will have 4 bolts. remove the 2 bolts i bottom of the bumper they will be on each side of the license plate in the front. Remove the 2 upper bolts in the grille area. This will allow you to remove the bumper skin. To remove the impact bumper remove the u bolt on each side they each have 2 nuts. remove the bumper

Take the bumper off and use a fibre glass repair kit to repair it.

Or a hot glue gun and some strips of metal will do the trick

Then buy a color match polish and give it some elbow grease