There is no EGR on the '91
Hello, Paint codes on the 1992 buick cars are usually found under the spare tire cover. Good luck
It is located on the spare tire cover.
on the underside of the trunk lid this may be helpful http://www.automotivetouchup.com/paint-codes/buick.htm
The code number is located in the trunk, it is the bottom nunber. location is on the under side of the trunk.
EGR Valve
Trouble code P1133 means:HO2S insufficient switching
The paint code is located on the option label in the trunk. -------------------------
Trouble code P0306 means:Cylinder 6 misfire detected
Trouble code P0306 means:Cylinder 6 misfire detected
Trouble code P0440 means:Evaporative emission control system malfunction
The paint code is located on the trim tag which is located on the firewall near the brake booster or master cylinder