2021 GMC Truck Sierra Denali 3500 Engine — Part # 027801 — A Plus Auto Parts · Pasadena, TX

Engine for 2021 GMC Truck Sierra Denali 3500

Product Details

Part Number

027801

Vehicle

2021 GMC Truck Sierra Denali 3500

Description

When replacing or upgrading the engine in your 2021 GMC Truck Sierra Denali 3500, one often overlooked but critical consideration is ensuring the engine's compatibility with your vehicle's specific drivetrain and transmission setup. This particular engine is designed for a 6.6-liter displacement and is paired with an automatic transmission (AT) and a 4x4 drivetrain, which are essential details to confirm before purchase to avoid installation issues or performance mismatches. This engine, identified by seller stock number 027801, comes from a 2021 GMC Truck Sierra Denali 3500, a heavy-duty truck known for its robust power and towing capabilities. The seller notes include the engine's configuration as 6.6 liters with automatic transmission and four-wheel drive, which aligns with the truck's original setup. The grade "X" indicates the seller's classification of the part's condition, which should be clarified directly with the seller for specifics. When comparing this engine to others, verify the exact engine code and any additional features such as emissions equipment or electronic control modules, as these can vary even within the same model year and affect compatibility. Also, consider the estimated CO2e savings of 1194 kg noted by the seller, which may reflect environmental benefits or efficiency improvements. Before purchasing, check the engine's physical condition, mileage, and service history if available. Confirm that the engine's mounting points and connections match your vehicle's requirements. Since this engine is from a 2021 model, it likely includes modern emissions and control systems that must be compatible with your truck's existing systems. For more information on compatible parts, you can explore GMC parts or specifically Truck Sierra Denali 3500 parts. Taking these steps will help ensure a smooth replacement and maintain your vehicle's performance and reliability. Consider reaching out to the seller with any questions about the engine's history and condition before finalizing your purchase.

Enhanced product content

Fitment & Buyer Verification

This engine is listed for a 2021 GMC Truck Sierra Denali 3500 with a 6.6L engine, automatic transmission, and 4x4 drivetrain. Buyers should verify exact compatibility with their vehicle's configuration.

Record only

Fitment checks

Vehicle Compatibility

Use these records to confirm the vehicle match before purchase.

Check	What to verify	Buyer action	Basis
Vehicle Year	2021	Confirm this detail before ordering.	Product recordHigh
Vehicle Make	GMC	Confirm this detail before ordering.	Product recordHigh
Vehicle Model	Truck Sierra Denali 3500	Confirm this detail before ordering.	Product recordHigh
Drivetrain Type	4x4	Confirm this detail before ordering.	Listing noteHigh

Option checks

Configuration Details

Match trim, equipment, and listing-specific details against your vehicle.

Check	What to verify	Buyer action	Basis
Engine Displacement	6.6L	Confirm your vehicle uses a 6.6L engine to ensure compatibility.	Listing noteHigh
Transmission Type	Automatic	Verify your truck has an automatic transmission matching this engine's setup.	Listing noteHigh
Emission Compliance	Unknown	Check if the engine meets your local emission standards and matches your vehicle's emissions system.	AI-assisted reviewLow
Engine Control Modules Included	Unknown	Confirm whether the engine includes necessary electronic control modules for your vehicle.	AI-assisted reviewLow

Before ordering

Buyer Verification Checklist

Verify engine displacement matches your vehicle's original engine (6.6L).
Confirm transmission type is automatic as listed.
Check drivetrain compatibility (4x4) with your truck.
Request detailed condition and service history from the seller.
Confirm mounting points and connections match your vehicle's engine bay.

Condition review

Condition & Inspection Notes

Inspect engine for physical damage or leaks.
Request information on engine mileage and usage history.
Confirm the condition of electronic components and sensors.

Common questions

Product Fitment FAQs

Is this engine compatible with all 2021 GMC Sierra Denali 3500 trucks?

This engine is from a 2021 GMC Truck Sierra Denali 3500 with a 6.6L engine, automatic transmission, and 4x4 drivetrain. Compatibility depends on matching these specifications with your vehicle.

What does the grade 'X' indicate?

The seller has assigned a grade 'X' to this engine, but specific details about this grading are not provided. It's recommended to ask the seller for clarification regarding the engine's condition.

Does this engine come with necessary electronic control modules?

The listing does not specify if electronic control modules are included. Buyers should confirm with the seller to ensure all required components for operation are provided.

Source review