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Details
- Brand:
- SKU:
21688
- GTIN: 00707773843970
- UPC: 707773843970
- Other Names:
22805590
- Description: GM Genuine Parts Radiators are designed, engineered, and tested to rigorous standards, and are backed by General Motors. Radiators are heat exchangers, typically located in the front of the vehicle where air can flow through the fins and dissipate heat. Modern radiators are made from aluminum and plastic, while older vehicles used copper and brass. These radiators are designed to be corrosion resistant with optimal heat transfer characteristics. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE). ⚠ WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
- Condition: New
- Warranty:
Radiator - ACDelco (21688)
- Core Charge: $63.00 Core Charge Applies
Pricing is valid online only and may vary in your local store
Vehicle Fitment
Vehicle Fitment
| Year | Make | Model | Body & Trim | Engine & Transmission |
|---|
Key Product Information
Additional Information
| Brand | GM Genuine Parts |
| Coolant Level Indicator Port | No |
| Core Height | 438.1 17.25 |
| Core Material | Aluminum |
| Core Row Quantity | 1 |
| Core Thickness | 2.15 54.5 |
| Core Width | 863.6 34 |
| Down Flow Or Cross Flow Type | Cross Flow |
| Engine Oil Cooler Included | No |
| FAQ - Answer 1 | No, an overheating engine could mean an issue with your radiator, but there are other pieces of the cooling system that could cause the engine to overheat. It is important to check for coolant leaks or a malfunctioning fan. If you look at the radiator and there is a lot of corrosion or holes there may be a problem with the radiator. Either way it is important to get the whole cooling system checked when your engine overheats. |
| FAQ - Question 1 | My engine is overheating does this mean I need to replace my radiator? |
| Features & Benefits - Bullet 1 | Lightweight; the radiators have a positive heat transfer to weight ratio |
| Features & Benefits - Bullet 2 | Corrosion-resistant aluminum designed core helps optimize the radiators long lasting service life |
| Features & Benefits - Bullet 3 | Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE) |
| Features & Benefits - Bullet 4 | GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors |
| Features & Benefits - Bullet 5 | GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle |
| Features & Benefits - Bullet 6 | GM regularly updates production and service part designs to integrate new materials and technologies |
| Frame Included | Yes |
| Height (in) | 6.2 |
| Inlet Diameter | 47.78 1.88 |
| Inlet Header Length | 469 18.46 |
| Inlet Header Width | 134 5.28 |
| Inlet Location | 1.83 |
| Internal Engine Oil Cooler | No |
| Internal Transmission Oil Cooler | Yes |
| Length (in) | 44.7 |
| Mounting Hardware Included | No |
| Mounting Type | Pin |
| Outlet Diameter | 1.81 46.48 |
| Outlet Header Length | 497 19.57 |
| Outlet Header Width | 131 5.16 |
| Outlet Location | Bottom Right |
| Programming Required | No |
| Radiator Cap Included | No |
| Signs of Wear & Troubleshooting - Section 1 - Bullet 1 | Maintain proper coolant levels and check levels regularly. Also make sure to check coolants concentration because the water ratio can affect the freezing or boiling point. (Note: Never attempt to remove a surge or radiator cap while the engine is hot. Serious injury could result.) |
| Signs of Wear & Troubleshooting - Section 1 - Bullet 2 | Replace coolant with a mixture of antifreeze and water according to the owner's manual recommendations. |
| Signs of Wear & Troubleshooting - Section 1 - Bullet 3 | Evaluate radiator and radiator cap for leaks, corrosion, or worn cap gasket. Make sure to pressure test the cap. |
| Signs of Wear & Troubleshooting - Section 1 - Bullet 4 | Periodically, remove bugs, leaves, and other debris from the front of the radiator. They can block airflow and substantially reduce cooling efficiency. |
| Tank Material | Plastic |
| Thermostat Included | No |
| Transmission Oil Cooler Distance between Fittings | 292 11.5 |
| Transmission Oil Cooler Fitting Diameter | 0.47 12 |
| Transmission Oil Cooler Fitting Gender | Female |
| Transmission Oil Cooler Fitting Type | Quick Connect |
| Transmission Oil Cooler Included | Yes |
| Transmission Oil Cooler Length | 13.07 332 |
| Transmission Oil Cooler Plate Quantity | 6 |
| Transmission Oil Cooler Type | Plate |
| Weight (lb) | 14.33 |
| Width (in) | 19.7 |
Features and Benefits
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Product Reviews
Brand
ACDelco
Shop Official ACDelco Parts Online | AutoNation Parts
Browse our complete catalog of ACDelco replacement components at AutoNation’s Aftermarket Store. As the true Original Equipment (OE) and premium aftermarket brand for General Motors vehicles, ACDelco parts deliver factory-level precision, durability, and peace of mind.
- GM Original Equipment (OE): Factory-installed parts built to exact GM specifications for Chevrolet, GMC, Buick, and Cadillac vehicles.
- Gold (Professional): Premium aftermarket alternatives engineered for high performance and durability across GM and non-GM applications.
- Silver (Advantage): Dependable, quality replacement parts offering an economical solution for routine maintenance and repair.
Popular ACDelco categories available:
- Brake Pads, Rotors & Hydraulics
- Batteries, Alternators & Starters
- Filters, Spark Plugs & Ignition Components
- Steering, Suspension & Chassis Parts
Frequently Asked Questions for Radiator
How do I ensure Radiator fits my specific vehicle?
Verify your vehicle’s exact Year, Make, Model, Engine Size, and Trim Level using our vehicle selector above. Since manufacturing variations occur mid-model year, matching your original equipment (OE) part number or verifying fitment against your 17-digit Vehicle Identification Number (VIN) is the most accurate way to guarantee compatibility with 21688.
Does Radiator meet or exceed Original Equipment (OE) standards?
Yes. ACDelco components are engineered, tested, and backed by General Motors to meet or exceed original equipment specifications for fitment, thermal tolerance, and structural durability. This part is designed as a direct-fit replacement, maintaining factory performance without requiring custom modifications during installation.
Is this part EPA and CARB emissions compliant?
This component complies with Federal EPA emissions regulations for 49-state legal use. If your vehicle is registered in California or a state following California Air Resources Board (CARB) standards (such as NY, ME, or VT), please verify state-specific executive order (EO) compliance before purchase, as CARB-restricted parts cannot be legally installed on CARB-emissions equipped vehicles in those jurisdictions.
Does Radiator include all required installation hardware and gaskets?
Installation hardware inclusion varies by manufacturer assembly. If hardware, gaskets, or mounting brackets are supplied in the box, they will be explicitly listed in the product specs above. We recommend reviewing related components (such as new bolts, seals, or crush washers) prior to starting installation to ensure a complete repair.
Is there a core charge on Part #21688, and how do core returns work?
If a core deposit applies to this item, the exact core amount will display in your cart at checkout. To receive a full core credit, return your old, undamaged unit in the original manufacturer box within 30 days of purchase, following our standard Core Return guidelines.
What manufacturer warranty covers Radiator?
Radiator is backed by ACDelco’s standard manufacturer limited warranty protecting against defects in material and workmanship under normal vehicle operation. For specific coverage duration and claim procedures, please inspect our Warranty Information documentation.
How fast will Part #21688 ship to my address?
Orders placed before daily regional fulfillment cutoffs are dispatched rapidly from AutoNation’s nationwide logistics network. Estimated delivery timelines and expedited shipping choices are calculated directly at checkout based on destination availability.
What is the return policy if Radiator does not fit?
If an item arrives damaged or does not fit your verified application, you can request a return label through our portal under our standard Returns Policy. Returned items must be in clean, uninstalled condition in original brand packaging.
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aftermarket
About AutoNation Aftermarket Parts | ACDelco Authorized Dealer
Welcome to AutoNation Aftermarket Parts (aftermarket.autonationparts.com) — your premier destination for high-performance components, heavy-duty upgrades, and replacement auto parts engineered to match your vehicle's specifications. Backed by AutoNation’s nationwide network of over 300+ locations, our dedicated aftermarket store delivers top-tier components built to meet or exceed original equipment standards.
Popular Auto Parts Categories:
- A/C & Heating Systems
- Brakes & Brake Parts
- Air Intake Systems
- Batteries & Electrical Parts
- Cooling Systems
- Fuel Systems
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- Transmission & Drivetrain
- Towing & Hitches
- Wheels & Accessories
Looking for ACDelco OEM Quality & Fast Shipping?
Check your vehicle year, make, model, and engine requirements to ensure exact compatibility before placing your order.
Product Details
Upgrade or restore your vehicle with Radiator (SKU: 21688) from ACDelco. Manufactured to strict quality standards, this replacement component delivers exact-fit precision, superior durability, and reliable operation under demanding driving conditions.
| Product Name | Radiator |
| Manufacturer / Brand | ACDelco |
| Part Number / SKU | 21688 |
| Part Condition | Brand New Replacement Part |
| Fitment Standard | Direct Fit OEM Replacement |
Frequently Asked Questions for Radiator
What are the core specifications of Radiator?
This Radiator (SKU: 21688) is built by ACDelco using high-grade materials engineered for long-lasting performance, thermal stability, and exact-fit vehicle compatibility.
Is Radiator an original OEM or aftermarket replacement part?
This item (SKU: 21688) manufactured by ACDelco is a premium aftermarket replacement part engineered to meet or exceed original equipment manufacturer specifications. It offers exact-fit reliability and maximum durability at a competitive price point.
How do I confirm Radiator fits my specific vehicle?
To verify fitment for Radiator, check compatibility using our fitment lookup tool above. Cross-reference your exact year, make, model, and engine specifications before ordering to ensure proper clearance and performance.
What related components should I inspect when replacing this part?
When installing a new Radiator, technicians recommend inspecting surrounding hardware, mounting brackets, seals, and connecting lines. Replacing worn supporting components at the same time helps prevent premature wear and maintains peak system efficiency.
What quality and manufacturing standards does ACDelco follow?
ACDelco replacement parts undergo rigorous quality testing and strict dimensional tolerance checks. Engineered using premium-grade materials, this component is designed to withstand harsh operating conditions, thermal stress, and routine vehicle vibration.
Can I install Radiator myself or do I need a technician?
Many ACDelco components are designed for straightforward DIY installation. Refer to factory service manuals or OEM repair procedures for exact torque specifications and sequence steps. If complex electrical diagnosis, specialized hydraulic bleeding, or heavy mechanical tools are required, consult a certified automotive technician.
What are the common symptoms indicating this component needs replacement?
Key indicators that a replacement part like Radiator may be needed include unusual noises, diminished mechanical responsiveness, fluid leaks, visible structural wear or corrosion, or active diagnostic trouble codes (DTCs) triggered by related sensors.
Does Radiator come with mounting hardware included?
Hardware inclusions vary by part type and manufacturer setup. Check the product specifications and images above to confirm whether installation hardware, gaskets, or adapters are supplied directly in the package.
How fast will Radiator ship to my location?
Orders for Radiator (SKU: 21688) are processed rapidly from our nationwide distribution centers. Visit our Shipping Policy page to review estimated ground transit times, expedited shipping rates, and order tracking details.
What is the return policy for Radiator?
If Radiator arrives damaged or does not fit your vehicle, you can initiate a return or exchange under our standard Returns & Refund Policy. Please verify your vehicle fitment details prior to ordering to ensure seamless compatibility.
Why buy ACDelco parts from AutoNation Aftermarket?
AutoNation is one of America's most trusted automotive retailers with over 300+ locations nationwide. When you order ACDelco products from our aftermarket store, you get competitive direct pricing, guaranteed product authenticity, and dedicated customer support.