OER Parts offers a wide selection of Starter Parts and Hardware for your 1991 GMC Sonoma. OER Parts offers 1991 GMC Sonoma Starter Motor Brace, 1991 GMC Sonoma Starter Mounting Bolts, 1991 GMC Sonoma Starter Motor Heat Shield, 1991 GMC Sonoma Starter Solenoid, 1991 GMC Sonoma Starter Rebuild Kit, 1991 GMC Sonoma Starter Shim Set, 1991 GMC Sonoma Starter Heat Shield Set, and 1991 GMC Sonoma Floor Mounted Starter Switch.