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An LS engine sits differently in an S10 or S10 Blazer engine bay than the small-block or 4-cylinder it replaced, and the inlet/outlet layout, fan clearance and shroud mounts rarely line up with a stock radiator. The picks below split into two groups: radiators built and cataloged specifically for an S10 LS swap, and universal LS-swap aluminum radiators that cool just as well but need custom brackets or shroud fabrication to fit an S10 bay. Two well-known cooling brands are deliberately left off this list: Mishimoto’s S10 line is an OEM-spec replacement radiator built for the factory 2.2L/4.3L/V6 engine, not an LS-capable core, and Cold Case’s LS-swap catalog covers the C10, Camaro, Mustang, G-body and A-body but has no S10-specific part.
| # | Product | Price | Where to buy |
|---|---|---|---|
| 1 | DeWitts 1996-2004 Chevrolet S10 Truck LS Swap Direct-Fit Radiator | $550-$750 | Amazon |
| 2 | Frostbite Performance Cooling FB308 3-Row Aluminum Radiator | $750-$850 | Amazon |
| 3 | Champion Cooling Systems S10 LS Engine Conversion Radiator | $450-$650 | Amazon · eBay |
| 4 | ECP / Speed Cooling S10 V8 Conversion Radiator with Dual Fans | $350-$500 | Amazon |
| 5 | Northern Radiator 205067 Aluminum Radiator | $300-$450 | Amazon · eBay |
| 6 | Griffin PerformanceFit LS Swap Combo Unit (Radiator + Shroud + Dual Fans) | $650-$900 | Amazon |
| 7 | Be Cool LS Swap Direct-Fit Aluminum Radiator | $600-$900 | Amazon |
| 8 | Speedway Motors Universal LS Swap Aluminum Radiator | $250-$450 | Amazon |
The picks, in detail
DeWitts 1996-2004 Chevrolet S10 Truck LS Swap Direct-Fit Radiator
DeWitts builds this radiator to bolt straight into the second-gen S10’s stock mounts with an LS-appropriate inlet/outlet layout, so there’s no shroud fabrication involved.
- Epoxy-free aluminum core
- Factory-style press-formed end tanks
- Serpentine fin design
- Bolts to stock 1996-2004 S10 radiator mounts
- True direct-fit for the second-gen S10
- No shroud modification needed
- Limited lifetime warranty
- Premium price versus a universal radiator
- Doesn’t cover the 1982-1993 first-gen S10
Frostbite Performance Cooling FB308 3-Row Aluminum Radiator
Frostbite catalogs the FB308 specifically for the 1982-1993 first-gen S10/Blazer LS swap (a companion FB309 covers 1994-2004 2WD trucks), so you’re buying a part number matched to your truck’s year, not a generic LS radiator.
- 3-row aluminum core
- Dedicated 1982-1993 S10/Blazer LS-swap fitment
- Dual electric fan compatible
- Purpose-built for the first-gen S10 body
- More cooling capacity than the stock 2-row
- Different part number (FB309) needed for 1994-2004 trucks – order the right one for your year
Champion Cooling Systems S10 LS Engine Conversion Radiator
Champion’s PRO Series is cataloged as a direct replacement specifically for LS-converted 1986-2005 Chevy S10 pickups, with the twin 1.5-inch fittings the LS accessory drive expects.
- Dual-pass aluminum core
- Cataloged for 1986-2005 S10 LS conversions
- Two 1.5-inch fittings sized for LS hose routing
- Dedicated S10 catalog listing rather than a generic LS part
- U.S. aluminum radiator manufacturer
- Sold mainly through specialty cooling retailers rather than big-box auto parts stores, so pricing takes more shopping around
ECP / Speed Cooling S10 V8 Conversion Radiator with Dual Fans
This 2-row all-aluminum radiator ships with dual 11-inch, 3,000 CFM fans included, so the fan cost is already baked into the price rather than a separate line item.
- All-aluminum 1.0-inch tube 2-row core
- Dual 11-inch 3,000 CFM electric fans included
- Core 15 inches high x 23-5/8 inches wide
- Fans bundled into the price
- Maker claims it outcools a 4-row copper/brass radiator
- Smaller shop, less brand recognition than DeWitts or Frostbite
Northern Radiator 205067 Aluminum Radiator
Northern’s 205067 is a double-pass aluminum radiator built for 1982-1993 S10/GMC Jimmy small-block V8 swaps – a real, well-known part number worth cross-checking against an LS’s specific inlet/outlet position.
- Double-pass aluminum core
- Cataloged for 1982-1993 S10/Jimmy SBC V8 swaps
- Established 60-plus-year radiator manufacturer
- Real, verifiable part number
- Cataloged for small-block V8 swaps rather than LS specifically – confirm the inlet/outlet position clears your LS accessory drive before ordering
Griffin PerformanceFit LS Swap Combo Unit (Radiator + Shroud + Dual Fans)
Griffin’s ComboUnit line packages an aluminum crossflow radiator with shroud, dual fans, wiring and cap in one box. It’s cataloged mainly for GM A/F-body chassis (Camaro, Chevelle, Firebird), so an S10 install means building your own mounting brackets.
- Crossflow aluminum core
- Complete kit: shroud, dual fans, wiring harness, radiator cap
- Everything needed to cool the swap in one purchase
- Well-known name in LS-swap cooling
- Not S10-specific – expect to fabricate mounts and shroud brackets to fit the S10 core support
Be Cool LS Swap Direct-Fit Aluminum Radiator
Be Cool’s LS-swap line uses the correctly sized LS inlets, outlets and steam ports across its GM truck fitments (demonstrated on the 67-72 and 73-87 C10). There’s no S10-specific listing, so treat it as a universal-tier option that needs custom brackets for an S10 bay, the same way the Griffin ComboUnit does.
- Dual 1-inch performance-grade core
- Fabricated tanks with OE brass drain petcock
- Correctly sized LS inlets, outlets and steam ports
- Purpose-engineered for LS swaps rather than a repurposed small-block radiator
- Available as a complete module with fans, shroud and wiring
- No S10-specific catalog part – expect the same custom-mounting work as the Griffin ComboUnit
Speedway Motors Universal LS Swap Aluminum Radiator
Speedway’s LS swap radiator line is a budget, DIY-friendly universal option in multiple core sizes – the cheapest way onto this list if you’re comfortable fabricating your own brackets.
- Universal-fit aluminum LS-swap radiator
- Multiple core size options
- Lowest price point on this list
- Wide stock and fast shipping
- Universal fit means custom brackets and shroud fabrication in an S10 engine bay
Buying tips
- Confirm which S10 body style you have (1982-1993 first-gen vs. 1994-2004 second-gen) before ordering – several of these radiators use different part numbers for each.
- A direct-fit radiator (DeWitts, Frostbite, Champion, ECP, Northern) saves the labor of fabricating shroud and fan mounts; a universal radiator (Griffin, Be Cool, Speedway) trades that convenience for a lower price and broader engine-bay compatibility.
- Skip Mishimoto’s S10 catalog for this project – it’s an OEM-spec replacement line for the factory engine, not built for LS cooling loads.
- Check that the radiator’s inlet/outlet position matches the LS’s water pump routing, not just a generic small-block V8 layout.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.