1974-1982 C3 Rear Bumper LH Upper Retainer Bracket 339123 - OEM Number(s) (339123)
Restore bumper alignment and mounting confidence with this 1974–1982 C3 Rear Bumper Upper Left Side Retainer for the driver side. Featuring threaded studs like the original GM part number 339123, this exact reproduction offers both factory fit and simplified installation. We’ve found that in real-world restorations, sheet metal screws often offer quicker, just-as-secure installation compared to factory studs—both options are supported here.
Features
• Fits 1974–1982 Corvettes – C3 Generation
• LH (Driver Side) Upper Retainer – Rear Bumper Center Section
• Reproduction of GM 339123 with Original-Style Threaded Studs
• Compatible with OE Fasteners or Sheet Metal Screws
• Metal Construction for Long-Term Structural Integrity
Dimensions and Weight
• Overall Length: 25 in (63.5 cm)
• Width: 3/16 in (0.48 cm)
• 10–24 Threaded Stud
Because Details Matter
This isn't just a cosmetic trim bracket—it's the structural link between your bumper and your Corvette's fiberglass rear body. Misaligned or missing retainers are a common source of stress cracks, poor bumper alignment, and rattling panels. Don’t compromise your restoration—install it right the first time.
Also known under these part numbers: (For reference only)