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 UnderbodyEntry Lighting
The headlamps, parking lamps, taillamps, back-up lamps, and most of the interior
lamps turn on briefly when is pressed
on the Remote Keyless Entry (RKE) transmitter.
After about 30 seconds the exterior lamps turn off, and then the dome and remaining
interior lights will dim to off. Entry lig ...
Starter Switch Check
WARNING
When you are doing this inspection, the vehicle could move suddenly. If the
vehicle moves, you or others could be injured.
1. Before starting this check, be sure there is enough room around the vehicle.
2. Firmly apply both the parking brake and the regular brake.
Do not use the accele ...
Front Seat Track Synchronization
The fore/aft manual adjuster is composed of an inboard track assembly (5),
and outboard track (4) assembly, and an adjuster handle (1).
Each track assembly is made of an upper track (2) and a lower track (3). Both
tracks need to be aligned prior to installing in the vehicle.
To align t ...