Here is a picture of that ground (G302) for the power window master switch. Also, check the wiring inside the lf door rubber grommet for any breakage, fraying or poor wiring connections.
hi,
it says i am not authorized to view when i click on the diagram to show me where the g302 ground location is.
P&ontiac Technician
GM Certified, GM Mark of Excellence, ASE Master Certified.