GM Radio Antenna Base
Genuine GM · Part #42747534 · Audio / Antenna
Genuine GM radio antenna base for vehicles equipped with satellite radio. It seals out water and provides the antenna system ground.
- Part number
- 42747534
- Fits
- Chevrolet Trailblazer, 2021–2025 (all trims: L, LS, LT, RS, ACTIV), equipped with satellite radio / roof radio antenna.
- Replaces
42740211
- AutoNation price
- $79.47 (as of 2026-07-12)
Shop this part at AutoNation Parts →
Before you order
- Confirm it fits with your VIN before buying.
- The numbers under “Replaces” are older, superseded numbers — why GM part numbers change.
Details on this page were taken from the live AutoNation Parts listing (https://www.autonationparts.com/parts/gm-radio-antenna-base-42747534) on 2026-07-12. Prices and availability can change — confirm on the retailer’s page before purchase. Vehicle fitment was cross-checked against PartsGeek(https://www.partsgeek.com/ss/?i=1&ssq=42747534).