Reproduce it on purpose
Identify whether the noise follows bumps, steering input, braking, acceleration or vehicle speed. That operating condition is the first branch.
CHASSIS · 2002 · FRONT SUSPENSION
2002 Firebird Front-Suspension Noise Diagnosis
A clunk over bumps, steering pop and road-speed growl are different problems. Reproduce the exact condition before loading the parts cannon.
APPLICATION: 2002 Pontiac Firebird / Formula / Trans Am. Modified suspension cars must be diagnosed with the installed springs, shocks, control arms, bushings and ride height.
Inspect before disassembly
Check fasteners, mounts, bushings, ball-joint/control-arm areas, stabilizer hardware, spring/shock attachment and signs of metal-to-metal contact.
Modified car checkpoint
Lowering, aftermarket shocks, tubular arms, altered wheel offset and tire size can create contact or preload that a stock-car diagnostic assumption will miss.
DO NOT REPLACE SHOCKS FROM NOISE ALONE
Prove the noise source. A suspension noise can originate from loose hardware, tire/wheel contact, steering, brakes or a wheel bearing.
FPV RULE
OBSERVE → MEASURE → ISOLATE → PROVE → REPAIR → VERIFY. A symptom is a starting point, not a parts verdict.
AFTER THE FAILURE IS PROVEN
Use the proven failed branch—not the original symptom—to choose the replacement. Go from diagnosis to the Parts Verdict →