GMC Sierra Engine

Replacement Parts

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An award-winning truck like your Sierra is only as good as its engine. When you see steam pouring out from under the hood, your ride is going to suffer. Fortunately, AutoZone carries a selection of engines for GMC Sierra to restore your truck's power and performance.

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  • Part Number: P4259
  • Notes: Long block
    IMPORTANT: See Warranty Information Bulletin. The VIN# is required to ensure that the correct part is shipped. Premium Engine with oil pan & timing cover. With VVT (Variable Valve Timing). Without AFM (Active Fuel Management). Call Tri Star at 1-855-459-6671 for customer service, availability and technical assistance. "Expected delivery date does not account for the required special freight shipping. Most deliveries will arrive within 5-7 business days".
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A GMC Sierra engine requires regular maintenance. Keep it well watered to prevent issues from overheating and pressure, such as cylinder casting cracks. If you have an oil leak, the loss of lubrication ruins the engine quickly, and so does a leaky radiator. No matter what caused your engine to fail, Sierra replacement engines from AutoZone bring your truck back to life. Order online and get your engine right away by choosing Same Day Store Pickup (in most cases) at the location nearest you. We offer trustworthy advice provided by our helpful staff and a Loan-a-Tool program so your repairs are easier whenever you visit your local store.

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