OER Parts offers a wide selection of Starter Parts and Hardware for your 1999 GMC Sonoma. OER Parts offers 1999 GMC Sonoma Starter Motor Brace, 1999 GMC Sonoma Starter Mounting Bolts, 1999 GMC Sonoma Starter Motor Heat Shield, 1999 GMC Sonoma Starter Solenoid, 1999 GMC Sonoma Starter Rebuild Kit, 1999 GMC Sonoma Starter Shim Set, 1999 GMC Sonoma Starter Heat Shield Set, and 1999 GMC Sonoma Floor Mounted Starter Switch.