GM 42644796 Lower Radiator Air Baffle

( Brand: Gm ), ( Manufacturer Part Number: 42644796 ), ( Part Type: Baffle Radiator ), ( Genuine Oem: Yes ), ( Manufacturer Warranty: 1 Year ), ( Universal Fitment: Direct Replacement ), ( Make: Chevrolet ), ( Year: 2017 2018 2019 2020 2021 ), ( Parts Included: Only Part Reference 7 On The Diagram Is Included ), ( Replaces Part Number: 95429867 )

Review GM Genuine Lower Radiator Air Baffle fits 2017–2021

The **GM 42644796 Lower Radiator Air Baffle** is a precision-engineered component designed to optimize airflow and cooling efficiency within General Motors vehicles equipped with front-wheel-drive or transverse-engine layouts. This baffle serves as a critical barrier between the engine bay and the radiator, directing airflow through the cooling system while minimizing turbulence and heat buildup in the surrounding areas. Crafted from durable, heat-resistant materials typically high-grade plastic reinforced with fiberglass or polycarbonate this baffle is engineered to withstand the rigors of high-temperature environments and prolonged exposure to road debris, ensuring long-term reliability. Its contoured design fits snugly around the lower radiator support and surrounding components, creating a sealed passage that channels air directly toward the radiator fins, enhancing heat dissipation and preventing overheating during demanding driving conditions. Beyond its primary cooling function, the baffle also plays a role in reducing engine bay noise by dampening airflow disturbances, contributing to a quieter cabin experience. Whether installed in classic models like the Chevrolet Impala, Pontiac Grand Prix, or more modern applications such as the Buick Regal or Cadillac ATS, this baffle is a straightforward yet essential upgrade for maintaining optimal engine performance and longevity. Its universal compatibility and straightforward installation make it an ideal choice for both professional mechanics and DIY enthusiasts looking to restore factory cooling efficiency or address overheating issues.

### **Pros and Cons of buying a GM 42644796 Lower Radiator Air Baffle**

1. **Improved Cooling Efficiency** The baffle helps direct airflow more effectively over the radiator, reducing heat buildup in the engine bay. This can prevent overheating, especially in high-performance or heavily loaded applications.

2. **Enhanced Durability** GM s aftermarket parts are generally designed to meet or exceed OEM standards, ensuring better longevity compared to generic or low-quality alternatives.

3. **Compatibility** This specific part is engineered for GM vehicles (likely older models with the 426 cubic-inch V8 engine, such as the LS1, LS6, or related applications). It fits seamlessly without requiring extensive modifications.

4. **Heat Shielding** The baffle helps block hot air from recirculating back into the engine bay, which can reduce the risk of warping components like the oil pan or intake manifold.

5. **Ease of Installation** GM parts are often designed for straightforward installation, reducing labor time and potential fitting issues.

6. **Support for Performance Upgrades** If you re running a high-flow radiator, larger intercooler, or forced induction, this baffle can help maintain proper airflow dynamics.

---

1. **Cost** GM aftermarket parts can be more expensive than generic or third-party alternatives, which may offer similar functionality at a lower price.

2. **Potential Overkill for Stock Applications** If your vehicle is not heavily modified or used in extreme conditions, the benefits of the baffle may be minimal, making the purchase unnecessary.

3. **Installation Complexity** Depending on your vehicle s design, installing the baffle may require removing or repositioning other components (e.g., hood scoops, sensors, or wiring harnesses), adding to labor time.

4. **Aesthetic Considerations** The baffle may not be visually appealing, especially if you prefer a clean, unobstructed engine bay. Some aftermarket options offer sleeker designs if aesthetics are a priority.

5. **Limited Availability** GM parts like this may not be as widely stocked as universal or brand-agnostic alternatives, potentially requiring special ordering or longer wait times.

6. **Potential for Airflow Restriction** While the baffle directs airflow, an improperly sized or poorly positioned one could restrict airflow too much, leading to reduced cooling performance in extreme conditions.

---

### **Conclusion**

The **GM 42644796 Lower Radiator Air Baffle** is a solid choice if you re running a high-performance setup, a large radiator, or encounter frequent overheating issues. Its OEM-quality construction and precise fitment make it a reliable upgrade for GM V8 applications. However, if your vehicle is stock or lightly modified, the benefits may not justify the cost.

For stock or mildly modified vehicles, a **universal baffle** or **no baffle at all** (with proper airflow management) might suffice. If you re pushing performance limits, the GM part is worth the investment for long-term reliability.

- **Buy it if:** You have a high-performance engine, a large radiator, or frequently drive in high-load conditions (e.g., towing, track use, or forced induction).

- **Skip it if:** Your vehicle is stock or lightly modified, and you re on a budget. Instead, focus on ensuring proper radiator mounting, hoses, and cooling system maintenance.

- **Alternative:** If cost is a concern, consider a **high-quality aftermarket baffle** (e.g., from AEM, Racepak, or Melling) that offers similar benefits at a lower price.

For best results, pair this with a **properly sized radiator, thermostat, and cooling fan setup** to maximize efficiency.

Details:

High-value items are usually sent with signature-delivery requirements. Parts and prices listed on our site are based off GM pricing.

part #: 42644796 prices

• $58.68-$75.86

specifications ocoosys:

• for years: 2017-2021
• brand: Gm
• mpn: 42644796
• part type: Baffle Radiator
• genuine oem: Yes
• manufacturer warranty: 1 Year
• universal fitment: Direct Replacement
• make: Chevrolet
• year: 2017 2018 2019 2020 2021
• parts included: Only Part Reference 7 On The Diagram Is Included
• replaces part number: 95429867

general ocoosys:

• Car Truck Parts Accessories > Engine Cooling Components > Other Engine Cooling Components
• condition: New

seller ocoosys:

• city: Tomball, Texas
• rating: 99.7%
• # reviews: 4397

offer ocoosys:

• options: Ship-to-home
• sold: 0
• availability: In Stock
• quantity: 5
• started: February 3, 2026

returns ocoosys:

• time: 30 Days
• policy: Returns Accepted
• paid by: Seller

shipping ocoosys:

• type: Fixed
• class: Standard, Expedited, One-day
• service: UPS Ground, UPS 2nd Day Air, UPS Next Day Air Saver
• transit: 3-9 Days
• carrier: UPS
• cost: $26.67

payments ocoosys:

• other
• wallet: Paypal
• credit card: Visa

Gm 42644796 Is Similar To:

• 10096136 Genuine Gm Engine Coolant Temperature Sensor (36.7% similar) See jink-vol for reference. Some hard to find discontinued Gm ford Mopar parts. Please see the pictures as box bag may show dust. Genuine Gm engine coolant temperature sensor AcDelco new oem part...(February 25th, 2018)
• 10256544 Gm Genuine Silicone Hose (41% similar) Genuine Gm silicone pre formed heater hose set oem part...(November 6th, 2017)
• 12345797 Gm Genuine Original Dealer Coolant System Fluorescent Tracer Dye Oz (39.7% similar) New old stock original Gm equipment...(June 11th, 2018)
• 12378255 General Motors Genuine Gm Acdelco Coolant System Sealing Tabs Stop (23.3% similar) This listing is for a package of gram Gm coolant system sealing tablet's...(March 27th, 2019)
• 12543281 Gm New Diesel Radiator (39.5% similar) ...(May 22nd, 2017)
• 12583048 Gm Brand New Genuine Oem Engine Coolant Outlet Gasket (35.5% similar) The offer is what you see in pictures...(April 1st, 2018)
• 12656444 Gm Oem-radiator Coolant Temperature (42.7% similar) ...(December 2nd, 2017)
• 12842086 Gm Saab Expansion Tank Genuine (26.2% similar) 8t Saab aery sedan 8t Saab aery wagon radiator expansion tank. Free shipping applies only to the USA and us territories. 88T Saab aery sedan 8t Saab sedan zed 0t Saab wagon zed 8t Saab aery wagon zed 0t Saab aery convertible fits: Saab aery convertible 8t Saab aery convertible ensure this part fits ...(April 3rd, 2018)
• 13267668 Gm Radiator 13 14 (47.9% similar) All parts have been: carefully inspected. Unless stated otherwise in the , all used parts come with a six month replacement limited warranty and 30 day money-back return period. Rear is towards the trunk, hatch, or bed. Transmission type manual or auto, and the body 2 door, 4/5 door hatch, etc. ...(July 20th, 2017)
• 13393368 Gm Chevrolet Cruze Radiator Antifreeze Overflow Tank Bottle Reservoir (34.1% similar) You are looking at cooling fluid tank donor: 2013 Chevy Cruz LTZ...(October 25th, 2018)
• 15-51259 Acdelco Gm Original Equipment Instrument Panel Air Duct Temperature Sensor (23.4% similar) When cars breakdown, car owners are left with little alternative than to fix them up again...(February 9th, 2019)