The 1988 Fiero Service Manual Section 3A, Figure 5, Wheel Alignment Specifications Revised. See Illustration.
SPECIFICATIONS FOR DIAGNOSIS FOR WARRANTY REPAIRS OR SERVICE SETTING CUSTOMER PAID SERVICE (SERVICE CHECKING)
FRONT TOE DEG (PER WHEEL) 0.3 DEG +/- 0.2 Deg TOTAL 0.3 DEG TOTAL
CAMBER FRONT 0 DEG +/- .5 DEG 0 DEG
CASTER FRONT 3.0 DEG +/- .5 DEG 3.0 DEG (MANUAL STRNG)
CASTER FRONT 5.0 DEG +/- .5 DEG 5.0 DEG (GT & FORMULA)
CAMBER REAR -1.0 DEG +/- .5 DEG -1.0 DEG +/- .5 DEG
REAR TOE DEG (PER WHEEL) .5 DEG +/- .1 DEG .15 DEG +/- .1 DEG
. Vehicle must be jounced three times before checking alignment, to eliminate false geometry readings
. Front toe adjustment to be set separately per wheel, with steering wheel held in "straight-ahead" position within +/- 5.0 DEG.
. Front & rear cross car camber must be within 0.75 DEG.
. Front cross car caster must be within 0.75 DEG.
. Tie rod boot must not be twisted and must be seated in tie rod groove.
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.