GM Service Manual Online
For 1990-2009 cars only

30 MPH SHUDDER REPLACE FRT SPRINGS W/CODE BYR

SOME 1982 MODEL FIRENZAS EQUIPPED WITH THE 1.8L OHC (VIN 0) ENGINE MAY HAVE A SHUDDER CONDITION AT 30 MPH. INVESTIGATIONS INDICATE THAT THESE CARS ARE EQUIPPED WITH FRONT SPRINGS CODED BYS. THESE SPRINGS MAY ALLOW THE FRONT END TO CARRY 3/4" HIGHER THAN SPECIFICATIONS AND THUS CAUSE THE SHUDDER. THIS CONDITION CAN BE CORRECTED BY REPLACING THE BYS SPRINGS WITH SPRINGS CODED BYR, PART NO. 14029329.

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.