This information provides repair recommendations and general guidelines for steel classified as Ultra High Strength Dual Phase Steel (Dual Phase Steel with a tensile strength greater than 800 MPa), also known as DPX.
General Motors recommends the following when repairing or replacing this type of steel during collision repair.
Note:
Recommended Repairs:
Special Tools and Equipment

Mild Steel
Frame and UnderbodyFloor Air Outlet Replacement
Removal Procedure
Remove the instrument panel assembly. Refer to Instrument Panel
Assembly Replacement.
Remove the instrument panel wiring harness (2) from the instrument panel
tie bar (1).
Disconnect the electrical connectors.
Remove the instrument panel tie bar ...
Air Conditioning Evaporator Hose Assembly Replacement
Preliminary Procedures
Recover the refrigerant. Refer to Refrigerant Recovery and Recharging.
Remove the headlamp - right side. Refer to Headlamp Replacement.
Loosen power steering fluid reservoir screw.
Remove brake pipes from the dash lower extension panel.
Remove engine mount. Ref ...
Parking Brake
To apply the parking brake, pull up on the parking brake handle. It is not necessary
to push in on the release button while applying the parking brake. If the ignition
is in the ON/RUN position, the brake system warning light will come on.
To release the parking brake:
1. Hold the brake peda ...