The GM Genuine Parts 171-1243 brake pad set is presented as an OE-quality replacement, designed with integrally molded friction material, premium shims, and specific backing-plate dimensions (approx. 120 × 55 mm per pad). It promises stable pedal feel, consistent deceleration, and an expected wear life of 35,000–45,000 miles, with moderate dust levels and straightforward installation. What trade-offs in noise and performance should a buyer expect, and which vehicles match these pads?
Key Takeaways
- OEM-quality replacement matching GM fit, form, and function for specified GM vehicles.
- Integrally molded friction on 4.5 mm steel backing with premium shims, slots, and chamfers for noise reduction.
- Consistent pedal feel and measured initial bite (0.3–0.5s) with predictable stopping performance.
- Durable life estimated 35,000–45,000 miles; replace pads in pairs and bed with 8–10 moderate stops.
- Installation requires 95 Nm caliper bolt torque, 12.7 mm minimum pad thickness, and rotor runout ≤0.05 mm.
Product Specifications and Construction
Although designed to meet GM OE standards for fit, form, and function, the GM Genuine Parts 171-1243 (84320501) front disc brake pad set also offers clear, measurable construction details that installers and vehicle owners will find useful.
How is it built? Integrally molded friction material bonded to a 4.5 mm steel backing plate, premium shims, 2.0 mm slots, and chamfers; material durability is specified for OEM replacement cycles.
What should one consider during fitment? Basic installation tips: torque caliper bolts to 95 Nm, confirm 12.7 mm pad thickness minimum, lubricate contact points, and verify rotor runout under 0.05 mm.
Performance and Ride Quality
Having reviewed the construction and fitment details, attention turns to how the GM Genuine Parts 171-1243 (84320501) front disc brake pads perform on the road and affect ride quality.
The pads deliver measured braking efficiency, consistent pedal feel, 0.3–0.5s initial bite, and stable deceleration under repeated stops. Noise reduction measures—shims, chamfers, bonded friction—cut squeal without muting feedback.
Will they free the driver from uncertainty? Yes, within OE tolerances.
Will they put doubt to rest? Yes — performance aligns with OE expectations, delivering dependable, predictable braking.
- Predictable stopping distances, tested at 60 mph to 0 in controlled conditions
- Minimal vibration transmitted to steering wheel
- Moderate dust generation, easy cleanup
- Durable wear rate, approx. 35,000–45,000 miles
Vehicle Compatibility and Replacement Guidance
The GM Genuine Parts 171-1243 (84320501) front disc brake pad set fits a defined range of GM vehicles and should be confirmed against vehicle-specific parameters—model year, axle position, and original equipment (OE) spec—before purchase.
It empowers owners to free themselves from uncertainty while ensuring correct fit, 1.2–1.5 mm shim clearance, and pad thickness matching OEM 12.7 mm nominal.
Installation tips: torque caliper bolts to OEM spec, apply brake grease to contact points, bed pads with 8–10 moderate stops.
Maintenance advice: inspect rotor runout ≤0.05 mm, check pad wear to 3 mm, replace in pairs.
Who benefits? Owners seeking reliable replacement.
