View 3 Photos View 0 Videos Caterpillar 3126 Muffler for a 1998 GMC T7500 Contact for price (Used) 1998 GMC T7500, MUFFLER- Location: Under Frame, Side: Driver Left Side, Engine: Caterpillar 3126 Material: Stainless Steel, Length: 36", Reference images for condition, For more... ConditionUsedFits To Make(s)GMCFits To Model(s)T7500Will Fit Year(s)1998Stock NumberP-506712 MLS Number14442984CategoryMufflers Last Updated6/21/2026 LocationElkton, MD, US Sold ByCRG Heavy Truck Parts (844) 402-___ SHOWNUMBERCall Seller Email Seller Save More Info