FIREBIRD MANUAL UPDATE CHART OMITTED FROM MANUAL

"THE ATTACHED PAGE WAS OMITTED FROM THE 1985 FIREBIRD SERVICE MANUAL. PLEASE INCLUDE THIS PAGE WITH YOUR COPY OF THE MANUAL."

TRIM HEIGHTS

THE FOLLOWING PROCEDURE SHOULD BE FOLLOWED BEFORE MAKING ANY TRIM HEIGHT MEASUREMENT.

1. "Z" AND "J" DIMENSIONS A. LIFT VEHICLE UP APPROXIMATELY 1 1/2" AT THE FRONT BUMPER AND GENTLY REMOVE HANDS ALLOWING VEHICLE TO SETTLE ON IT OWN. REPEAT THIS LIFTING OPERATION TWICE FOR A TOTAL OF THREE TIMES. MEASURE THE "Z" AND "J" HEIGHTS IN THE SETTLED POSITION AFTER THE THIRD LIFT.

B. PUSH VEHICLE DOWN APPROXIMATELY 1 1/2" AT THE FRONT BUMPER AND GENTLY REMOVE HANDS ALLOWING VEHICLE TO SETTLE ON ITS OWN. REPEAD THIS PUSHING DOWN OPERATION TWICE FOR A TOTAL OF 3 TIMES. MEASURE THE "Z" & "J" HEIGHTS IN THE SETTLED POSITION AFTER THE THIRD PUSH.

C. THE TRUE "Z" & "J" HEIGHT IS THE AVERAGE OF (A) AND (B) FOR EACH SIDE.

"D" & "K" DIMENSIONS

NOTE: FOLLOW THE SAME PATTERN AS STATED ABOVE FOR THE "Z" "J" DIMENSIONS WHEN MEASURING THE "O""K"DIMENSIONS EXCEPT: LIFT AND PUSH ON THE REAR BUMPER.

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.