CAMPAIGN: SUPPLEMENT RESTRICTED CATALYTIC CONVERTER for Chevrolet Impala 1981

The following information revises the "Involved Vehicle" section and "Figure 1" of Campaign Bulletin 82C31, issued June, 1983.

INVOLVED VEHICLES

Involved are certain 1981-1982 Full Size Chevrolet, Camaro, Malibu, Monte Carlo, El Camino and 1981 Corvette Models equipped with engine and emission systems within the following vehicle breakpoints:

Federal Emission Systems California Emission System (RPO NA5) (RPO NB2)

Engine RPO's VIN Code Engine RPO's VIN Code ------------ ------- -------------- -------- LC3 3.8L 229 K LG4 5.0L 305 H L39 4.4L 267 J L81 5.7L 350 6 LG4 5.0L 305 H LM1 5.7L 350 L LM1 5.7L 350 L L81 5.7L 350 6

Model Plant Year From Through ------------ ---- ---- -------- Arlington(R) 1981 SOP EOP 1982 SOP CR181936 Baltimore(B) 1981 SOP EOP 1982 SOP CB158156 **Fairfax(X) 1982 SOP CX109177 Janesville(J) 1981 SOP EOP 1982 SOP CJ121189 Oshawa(l) 1981 SOP EOP 1982 SOP C1203793 Norwood(N) 1981 SOP EOP All "F" W/Auto Trans 1982 SOP CN120571 All "F" Z28 Man Trans 1982 SOP EOP

Model Plant Year From Through -------------------- ----- ---- -------- Van Nuys(L) 1981 SOP EOP All "F" W/Auto Trans 1982 SOP CL149636 All "F" Z28 Man Trans 1982 SOP EOP

St. Louis(S) 1981 SOP EOP Bowling Green(5) 1981 SOP EOP *Leeds(K) 1981 SOP EOP

*Fremont(Z) 1981 SOP EOP

*Doraville(D) 1981 SOP EOP

*Additional Assembly Plants added. **No Chevrolets assembled at Fairfax in 1981.

IMPORTANT: Due to the limited usage of Part Number 25056682 (lower bed bead kit), dealers are requested to order the actual number of parts required for the repair.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.