How to remove the rear bumper on a 2010 vaukhall insignia

if you are using after market flaps then there will be a problem
talk with a service dealer as to how genuine flaps are fitted ,then make the adaptors to suit what you have

You have to take bumper cover off .
Remove rear bumper fascia. Refer to Rear Bumper Fascia Replacement . Disconnect electrical from the rear object sensor. Lift the locking tabs on the housing and remove the rear object sensor.
Preliminary Procedure

1. Remove the compartment sill plate. Refer to Rear Compartment Sill Trim Plate Replacement .
2. Remove rear wheel liners. Refer to Rear Wheelhouse Panel Liner Replacement .

1
Rear Fascia Push Pin Retainers (Qty: 2)
2
Rear Fascia Nuts (Qty: 4)
Tighten
10 N?·m (89 lb in)
3
Rear Fascia Bolts (Qty: 2)
4
Rear Fascia Bolts (Qty: 6)
5
Rear Fascia
Tip
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Energy absorber and fascia are removed together. Cannot be separate on vehicle.

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Disconnect the electrical connectors.

pull it up with bit of force

Try YouTube

The parts are on eBay around 100 dollars. If you do the repair then you will have to remove the whole back bumper. There is no way to do this without removing the whole bumper.

You would need to seek service repairs.

How do i adjust my hand brake on a vauxhall insignia year 2010?

There are six bolts from the bumper into the rear cross member to remove, accessible from inside the boot. You'll have to remove the rubber plugs to get to two of them. After that, remove the boot lining (that's the "trunk" lining if you're a Yank) and you'll see four bolts (two on each side) that secure the bumper by screwing downwards through the metal wing into the top sides of the bumper. Now go underneath the car, and there are two bolts accessible at the rear of the bumper, accessible from beneath. Now you need to uncrew a pair of 10mm plastic nuts under the wheel arch lining/mudflap and two which are behine the rear wheels. Fold the wheel arch lining away from the bumper and there's a screw in the very front of the sides of the wing right at the point where it connects to the wheel arch. remove these (one on each side) and the bumper will slide backwards and off the body. Voila. Piece of cake. Remember to disconnect the wiring to the rear sensors and pull the multiplug through out of the hole, carefully removing the grommet.

Re-fitting is a bit trickier, so use a couple of beer crates or boxes to hold the bumper up below the rear as you line up the tabs on the air exits and slide the bumper back.

put car into reverse with ignition on (not running) and either listen very closely or feel each sensor with your finger tips, you should hear a clicking noise or feel a ticking on the good sensors. once you have determined the faulty one simply release the two plastic retaining clips and push the sensor through the bumper inwards, then remove plug and fit new sensor

  Remove the tail lamps,remove the plastic retainers from the wheel well area. Remove the retainers below the tailgate opening and below the bumper. Lift up on the sides of the bumper to disengage the sides of the bumper. Pull it back a little and disconnect the connector for the park aid sensors if equipped. Pull back and it is off.