OER Parts offers a wide selection of Starter Parts and Hardware for your 1977 GMC G25. OER Parts offers 1977 GMC G25 Starter Motor Brace, 1977 GMC G25 Starter Mounting Bolts, 1977 GMC G25 Starter Motor Heat Shield, 1977 GMC G25 Starter Solenoid, 1977 GMC G25 Starter Rebuild Kit, 1977 GMC G25 Starter Shim Set, 1977 GMC G25 Starter Heat Shield Set, and 1977 GMC G25 Floor Mounted Starter Switch.