The GMT400 (1988–1998) Silverado/Sierra uses a double-DIN opening on most trims, making aftermarket head unit installation straightforward.
GMT400 Radio Opening
Most GMT400 trucks came with a double DIN opening that accepts 7" touchscreen head units without modification. Verify your year/trim before ordering — some earlier models used single DIN.
Best GMT400 Head Unit Options:
1. Kissound 7" Double DIN (Best Value)
The Kissound 7" Double DIN with wireless Apple CarPlay/Android Auto is an excellent all-in-one upgrade. At under $100, it delivers features that were $500+ just a few years ago:
- Wireless CarPlay/Android Auto
- Bluetooth
- USB-C/AUX input
- Backup camera input
- 240W amplifier
2. Pioneer DMH-WT7600NEX
Pioneer’s premium double DIN is the best option for those who want top audio quality and premium brand support.
3. Boss Audio BE7ACP
A solid budget double DIN option with CarPlay/Android Auto. Good fit for GMT400 trucks needing basic modern connectivity.
Installation Notes:
The GMT400 requires a dash kit specific to 1988-1998 Silverado/Sierra. These are available from Metra for $15–25 and include the mounting brackets and trim bezel.
Wiring harness adapters are also needed — the factory harness uses GM’s connector, and an adapter converts it to the aftermarket standard.