Fraser Engines sells to the public & commercial auto shops! Phone Hours: Mon-Fri 8AM-5PM EST. Online ordering & Texting support open 24-7!
This unit requires a returnable core (your old engine block & heads). Fraser Engines will arrange free core pickup at no additional cost. The core deposit may be waived for up to 15 business days when the engine is shipped directly to a licensed repair facility. If the engine is shipped to a private residence, the core deposit must be paid upfront.
This unit is IN STOCK
⛟ Shipping is FREE to commercial address! $125.00 to a private residence.
Order before 3PM EST and receive your order in 2-3 business days! – some exclusions apply.
3 Year / Unlimited Miles parts and labor
Fully remanufactured engine block
Remanufactured cylinder heads (pressure tested & resurfaced)
New pistons, rings, and bearings
Timing components
Oil pump
New gaskets and seals throughout
Balanced rotating assembly
What even is a NO FAULT Warranty and why would I need it if the engine already has a warranty for free? –Click to View Standard vs NFW protection breakdown
1-Year No-Fault Warranty
$99.00
2-Year No-Fault Warranty
$199.00
3-Year No-Fault Warranty
$299.00
4-Year No-Fault Warranty
$399.00
5-Year No-Fault Elite
$499.00
Labor reimbursement uses published Mitchell or AllData times. One-time replacement applies per covered unit during the elected term.
Fraser Engines Premium Break-In Fluid is specially formulated to protect your new engine during the most critical phase of its life—the initial break-in period. Designed to promote proper ring seating, reduce friction, and prevent premature wear, this high-performance fluid helps ensure maximum longevity, smoother operation, and optimal performance from day one.
Trusted by engine builders and recommended by Fraser technicians, this break-in fluid provides the added protection your investment deserves during startup and early run time—when engine components need it most.
✔ Promotes proper piston ring seating
✔ Reduces initial wear and friction
✔ Helps protect camshafts, lifters, and bearings
✔ Ideal for all newly installed Fraser remanufactured engines
Highly recommended for every new engine installation.
Fraser Engines’ Premium Engine Installation Kit is designed to streamline your engine replacement while protecting your investment from day one. This all-inclusive kit replaces the most commonly worn supporting components that can affect performance, cooling, and reliability after installation.
Kit Includes:
✅ New drive belts
✅ New radiator and heater hoses
✅ New water pump
✅ New thermostat
✅ New air filter
✅ New oil filter
✅ New spark plugs
Installing new supporting components helps reduce repeat labor, ensure proper cooling, and maximize the lifespan of your new engine.
⚠️ Availability may vary by application.
Please confirm availability during order confirmation to ensure this kit can be added to your purchase.
| Year(s) | Make | Model | Engine Code | Notes |
|---|---|---|---|---|
| 2004–2006 | Chevrolet | Colorado | 3.5L Atlas I5 (VIN 6) | Inline 5-cylinder gasoline engine |
| 2004–2006 | Chevrolet | Canyon | 3.5L Atlas I5 (VIN 6) | Mid-size truck application |
| 2004–2006 | GMC | Canyon | 3.5L Atlas I5 (VIN 6) | Shared platform with Colorado |
| 2006 | Hummer | H3 | 3.5L Atlas I5 (VIN 6) | Base engine before 3.7L upgrade |
If you’re searching for a remanufactured 3.5L GM Straight-5 engine replacement that delivers reliable performance, long-term durability, and factory-correct fitment, choosing the right remanufacturer is critical. The 3.5L GM Atlas inline-5 (I5) engine, found in Chevrolet Colorado, GMC Canyon, and early Hummer H3 models, has unique engineering and wear characteristics that require expert remanufacturing to ensure long-lasting service.
A Fraser Engines 3.5L GM Straight-5 engine is a true remanufactured engine, built from the ground up using precision machining, updated internal components, and rigorous quality control. Unlike used engines or budget “rebuilt” cores, Fraser engines are engineered to meet or exceed OEM performance standards — delivering dependable power for daily driving, towing, and every-day use.
Fraser Engines remanufactures every 3.5L Straight-5 engine with a full teardown and inspection, followed by:
Precision CNC machining of core engine components
Updated pistons, rings, bearings, and valve train components
Rebalanced rotating assembly for smooth operation
Rebuilt cylinder heads with proper valve sealing
New or updated wear components where needed
This ensures your engine arrives zero-mile ready, not simply cleaned up and resold.
The 3.5L GM Atlas engine can develop predictable wear — especially in high-mileage or commercial use. Fraser Engines rebuilds these engines with corrective machining and updated components to reduce issues such as:
Ring and piston wear
Valve guide and lifter wear
Oiling system and pressure concerns
Intake, head gasket, and seal failures
These corrections help restore compression, oil pressure, and torque consistency throughout the engine’s life.
Fraser’s remanufactured 3.5L GM engines are built to perform in applications such as:
Chevrolet Colorado (mid-size truck)
GMC Canyon (mid-size truck)
Hummer H3 (SUV)
These vehicles serve a variety of roles — from daily driving to light towing and utility work — and Fraser’s 3.5L engines are remanufactured to match the demands of each application.
The 3.5L GM Atlas engine has specific accessory, sensor, and emissions configurations depending on year and model. Fraser Engines verifies your VIN and vehicle details to ensure you receive the correct 3.5L Straight-5 GM engine, reducing installation delays and costly mistakes.
Fraser Engines backs its remanufactured 3.5L GM engines with industry-leading warranty coverage:
Up to 3-Year / Unlimited-Mile Parts & Labor Warranty (program dependent)
Labor reimbursement based on Mitchell or ALLDATA book time
Warranty claims handled directly by Fraser Engines
This level of protection gives you genuine peace of mind — far beyond parts-only coverage.
When you buy from Fraser Engines, you’re supported by engine professionals, not marketplace resellers. Our team provides:
Pre-sale fitment and application support
Technical assistance during installation
After-sale warranty and support
One company. One trusted point of contact.
Fraser Engines has been remanufacturing engines for over 60 years, earning a reputation for quality, consistency, and dependable performance. Our experience shows in every remanufactured 3.5L GM Straight-5 engine we ship.
A remanufactured 3.5L GM Straight-5 engine from Fraser Engines delivers:
✅ True ground-up remanufacturing — not used or lightly rebuilt
✅ Known wear points corrected and improved
✅ VIN-verified fitment for your vehicle
✅ Strong warranty protection with labor coverage
✅ Dedicated support from engine specialists
📞 Need a quote or help verifying fitment?
Call 800-731-3177 and speak with a Fraser Engines specialist today.
Our journey begins with a thorough visual inspection of each engine block for casting defects. We meticulously disassemble the components, inspecting each part for damage and identifying the cause of failure. We remove oil and water passage plugs to guarantee optimal results during thermal cleaning. We select only premium castings for our marine blocks, insisting on replacements in all salt-water applications. For high-performance engines, we utilize premium cores, never employing repaired castings or sleeved blocks, preserving the authenticity of your classic car’s original block casting with our skilled technicians’ craftsmanship.
We elevate engine parts to a new level of clean with our thermal cleaning system. This process evenly distributes heat throughout the chamber, avoiding overheating or warping. Components are heated in an oxygen-deficient atmosphere, decomposing combustible hydrocarbons and leaving parts dry. We use the Ace RKE 230 oven exclusively for cast iron blocks, ensuring ash residue is effortlessly removed in the subsequent stainless steel shot blasting phase.
Our shot-blasting method employs stainless steel shot to remove surface contamination like rust, creating a smoother finish. This step is vital for detecting surface and subsurface defects during quality inspection. The peening process imparts compression strength to the metal, preparing it for a preliminary defect inspection.
We use magnetic particle inspection to detect cracks and imperfections in ferrous engine parts, ensuring the highest quality for our cast iron blocks. Before proceeding to aluminum blocks, we explain their specific cleaning, testing, and defect checking processes.
Aluminum engine blocks first encounter our AXE SW20 OS spray cleaning system, which removes all foreign material with its powerful spraying action and multi-integrated nozzles. This step is crucial for a thorough inspection.
We use ultrasonic cleaning for aluminum blocks, known as the benchmark in cleanliness. This method reaches inaccessible areas, breaking the bonds that hold small particles to surfaces. Post-cleaning, the block undergoes pressure testing.
We employ the Delta Pressure tester to double-check for pinholes after magnafluxing and dye testing, ensuring the integrity of all castings used in our products.
After a complete visual inspection, we repair minor casting defects, remove broken bolts, tap threads, and perform gasket surface repairs to minimize stock removal.
We use the RMC CNC V40 enclosed machining center for precise and versatile machining. This computerized machine measures and levels blocks, measures deck heights & cylinder bore sizes, eliminating operator error. Our machine determines Ra finish based on block type and gasket used, utilizing CBN cutters and checking surface finish with the Mitutoyo SJ-301.
The Sunnen LBB-1600 Hone, measuring accuracy within .0001″, is our choice for precision rod reconditioning and pin fitting, ensuring honed bores equal to or better than new rods. High-performance engines are fitted with ARP high-strength bolts and nuts prior to this step.
We are the first to use Rottler’s newest cylinder honing machine, ensuring the most accurate honing with cylinders finishing within .0001″ roundness and straightness. This machine continuously analyzes and corrects the bore, maintaining evolving engine designs’ critical oil clearances and machining tolerances.
After precise machining, our blocks undergo a second high-pressure wash cycle, ensuring absolute cleanliness for final assembly.
We ultrasonically clean all parts prior to assembly, ensuring the ultimate cleanliness level. This method reaches every surface and internal area, providing the cleaning force required for the most stringent standards.
Each assembler at Fraser Engines conducts a thorough visual inspection and measures parts for proper size. We fit blocks with new cam bearings, oil restrictors, relief valves, new water and oil plugs, and more. Cylinder heads are installed with new bolts and gaskets, and each cylinder’s seal integrity is checked. The final inspection by our assembly manager ensures the highest quality for your remanufactured engine.
Fraser Engines is committed to delivering engines of exceptional quality and performance. Our rigorous, detailed remanufacturing process ensures every engine we deliver meets our high standards and exceeds your expectations.
At Fraser Engines, we embrace cutting-edge technology to ensure that every engine we remanufacture meets the highest standards of quality and performance. A cornerstone of our state-of-the-art machinery is the ACF200 Cylinder Boring-Resurfacing Machine. This sophisticated equipment plays a pivotal role in our engine rebuilding process, allowing us to deliver products that consistently exceed expectations.
The ACF200 is renowned for its precision and versatility. Our skilled technicians utilize this machine’s advanced capabilities to perform intricate machining tasks with unmatched accuracy.
Incorporating the ACF200 into our remanufacturing process allows us to offer several distinct advantages:
Meticulous Cylinder Machining: Each engine’s cylinders are bored and honed to exact dimensions, ensuring optimal fit and function. This meticulous attention to detail is crucial for the engine’s performance and the vehicle’s overall efficiency.
Flawless Surface Finishing: Proper head gasket sealing is paramount in engine rebuilding. The ACF200 enables us to resurface engine blocks and cylinder heads to precise specifications, ensuring a perfect seal and reliable performance.
Assured Quality and Performance: With the ACF200’s precision, every engine remanufactured at Fraser Engines is a testament to our commitment to quality. We don’t just rebuild engines; we enhance them, setting new benchmarks for performance and reliability in the remanufacturing industry.
At Fraser Engines, we pride ourselves on being at the forefront of remanufacturing innovation, and our CNC Crankshaft Grinder stands as a testament to this commitment. As a leading remanufacturer, we boast the utilization of CNC Crank Grinders, a technology that sets us apart and reinforces our position as an industry pioneer in the United States.
Our CNC Crankshaft Grinder represents the pinnacle of modern engineering, bringing the precision of fully automated production processes, typically exclusive to OEM plants, into our remanufacturing workflow.
One-Chucking Complete Grinding: Designed for efficiency and excellence, the CNC Crankshaft Grinder performs complete grinding of crankshafts in a single chucking. This advanced approach ensures consistency and precision throughout the entire process.
Unmatched Precision and Quality: The machine’s capabilities extend far beyond the current industry standards, offering:
At Fraser Engines, we’re committed to innovation and excellence in every facet of our remanufacturing process. Our continuous pursuit of improvement and our investment in the latest technologies underscore this commitment. A shining example of our forward-thinking approach is the integration of state-of-the-art flame spray technology into our operations.
Recently, Fraser Engines has taken a significant leap forward by incorporating the latest flame spray machine into our remanufacturing facilities. Installed and fully operational since 2016, this technology marks a new era in our production capabilities.
Setting New Standards in Finish Quality: The flame spray machine elevates our ability to meet and exceed the finish requirements for engine block cylinder bores. With this technology, Fraser Engines effortlessly surpasses the industry benchmarks for remanufacturing current model year engines.
Unparalleled Precision and Durability: Flame spray technology allows us to apply coatings with unmatched precision and uniformity, ensuring each engine block’s durability and performance are maximized. This process not only enhances the quality of the finished product but also extends the lifespan of the engines we remanufacture.