GM Service Manual Online
For 1990-2009 cars only

Quarter Panel Replacement for Chevrolet Cavalier (CNG) 1999

CNG Fill Valve Access Hole Drilling Procedure

  1. Replace the left quarter panel. Refer to Quarter Panel Replacement in the 1999 J Platform Service Manual.
  2. Measure and mark the left quarter panel. Refer to View 1 in Form and Pierce Holes Description . Verify all measurments before drilling.
  3. Drill the four holes (A, C, D, E) to 6.7 mm (17/64 in).
  4. Drill the one hole (B) to 76.2 mm (3.0 in) at a 20° angle. Refer to View 2 in Form and Pierce Holes Description .
  5. Vacuum all metal chips.
  6. Treat each hole with zinc-rich primer or the equivalent.