2020-2023 GMC Sierra 2500 3500 HD Aux Heater Wiring Harness Cover OEM
This is a Genuine GM OEM Auxiliary Heater Wiring Harness Cover, designed for the 2020–2023 GMC Sierra 2500 HD and Sierra 3500 HD. Note that only the part referenced as item #8 on the manufacturer's diagram is included in this listing.
This part is a direct-fit OEM replacement backed by a genuine GM fitment guarantee. Compatible with 6.0L V8, 6.6L V8 gas, and 6.6L V8 Duramax diesel engines across both the Sierra 2500 HD and Sierra 3500 HD for model years 2020 through 2023.
| Year Range | Make | Model | Trim/Engine | Notes/Options |
|---|---|---|---|---|
| 2020-2023 | GMC | Sierra 2500 HD | 6.0L V8, 6.6L V8 Gas, 6.6L V8 Duramax Diesel | Auxiliary Heater; Only part #8 on diagram included |
| 2020-2023 | GMC | Sierra 3500 HD | 6.0L V8, 6.6L V8 Gas, 6.6L V8 Duramax Diesel | Auxiliary Heater; Only part #8 on diagram included |
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