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Prices may varyThis product ranks #14 of 15 in Brake Rotors.Three above it ↓
Last reviewed July 16, 2026
TL;DR Vented front rotor from ACDelco's economy Silver tier for the 1999-2006 Chevrolet Silverado 1500 and GMC Sierra 1500. The braking surface is uncoated with a silver-paint coating on the hat; no iron grade or runout tolerance is published.
The 18A925A (GM part 19241877) is a vented, single-piece cast-iron front rotor from ACDelco Silver, the brand's economy tier, positioned below Gold. The braking surface ships uncoated; the hat and vanes carry a basic silver-paint coating, not Gold's baked-on zinc coating. No iron grade or runout tolerance is published. Owner forums generally favor Gold or GM OE for warping-prone use cases.
Right pick for a 1999-2006 Chevrolet Silverado 1500 or GMC Sierra 1500 owner who wants a GM-backed rotor at the lowest ACDelco price. Skip if you want a 24-month warranty or a coated braking surface, both offered by Gold.
No chemical exposure pathway, this is an inert cast-iron part with no SDS. Brake service stirs up brake dust: wear a dust mask and never blow it out with compressed air, that hazard belongs to the brake system, not this rotor. It recycles as ferrous scrap at most parts stores.
Independent parts catalogs (RockAuto, PartsHawk) cross-reference it to the 1999-2006 Chevrolet Silverado 1500 and 1999-2006 GMC Sierra 1500 (GMT800), front position. Confirm your exact year, trim, and brake package before ordering.
No. Silver is ACDelco's economy tier (formerly branded Advantage), positioned below Gold (formerly Professional). Silver does not publish an iron grade for this part, and its corrosion coating is a basic silver paint rather than Gold's baked-on zinc coating.
The braking (friction) surface is uncoated. The hat, edges, and vanes carry a silver-color paint layer for corrosion protection, which is ACDelco's standard finish for the Silver tier.
ACDelco's own Silver-tier retail channel states a 12-month, unlimited-mile limited warranty. This listing's own spec field states 24 months, which conflicts with ACDelco's published Silver-tier warranty terms, so the manufacturer's 12-month figure is treated as authoritative.
Vented. Independent parts-catalog listings confirm vented construction for this part number, matched to daily-driving use on the GM full-size platform.
The Amazon listing for ACDelco Silver Non-Coated Front Brake Rotor 18A925A carries a California Prop 65 warning. California requires this warning on a very wide range of manufactured goods — including rubber, vinyl, plastic, and metal automotive parts — whenever trace exposure to any of roughly 900 listed substances (commonly phthalates or heavy metals) is possible, regardless of whether the specific product poses a meaningful health risk. As a passive accessory, ACDelco Silver Non-Coated Front Brake Rotor 18A925A has no Safety Data Sheet, so there's no chemistry breakdown to translate beyond that.
Marketing copy from ACDelco, via Amazon. Not editorial.
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