2021 GMC Sierra 1500 Engines

Used and remanufactured engines that fit the 2021 GMC Sierra 1500. Each unit below is matched to this vehicle, warranty-backed, and shipped with freight quoted at checkout from Ironclad.

Available Engines (6)

Other GMC Sierra 1500 Years

2021 GMC Sierra 1500 Engine Market Context

Is replacing the engine worth it?

Vehicle value (full-size truck):
$17,571 – $22,363
Repair makes sense under:
≈$8,985

Rule of thumb: a engine replacement is usually worth it when the installed cost stays under 45% of what the 2021 GMC Sierra 1500 is worth — most units below beat that comfortably.

Frequently Asked Questions

Is it worth repairing or replacing the engine on a 2021 GMC Sierra 1500?

As a general rule of thumb, an engine replacement on a 2021 GMC Sierra 1500 (full-size truck segment, vehicle value roughly $17,571–$22,363) is usually worth it when the installed cost stays under about $8,985 — roughly 45% of what the vehicle is worth.

What years of GMC Sierra 1500 does an remanufactured or new engine fit?

Based on vendor-verified fitment data across 56 listed engines, remanufactured and new engines for this model cover the 1999–2026 model years. Always confirm your exact VIN or engine/transmission code before ordering, since fitment can vary by submodel or engine.