Chevrolet Sonic 2012 Body Repair Manual page 353

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BODY REPAIR 0-3
Collision Repair
9. Drill all factory welds (1). Note the number and location of welds for installation of the service assembly.
10. Remove the damaged rear side rail (1).
11. Drill two 8 mm (5/16 in)plug weld holes on each of the 3 sides of the rear rail (1). Position the center of the holes 10 mm
(3/8 in)from the cut edge.
Installation Procedure
1. Locate the original cutting line on the service part rear rail.
2. Align a sliding square or similar tool to the original cutting line and scribe a line across the rail.
3. Use the same tool to transfer this scribed line onto the sides and the weld flanges of the rail.
4. Place a mark forward, 25 mm (1 in)from the scribed line on all 3 sides of the service rail.
5. Use the tool to scribe a line on all 3 sides and weld flanges of the rail.