National
National Automatic Transmission Extension Housing Seal
$36.00
Free Shipping On Orders Over CA$99 (Some Exceptions Apply)
Free Shipping CA$99+
Fits Chevrolet, GMC, Hummer — 10 vehicle applications
Auto Trans Seal
or 4 payments of $11.25 with Sezzle*
Subject to approval. All payment options
You're $54 away from free shipping!
Free shipping on orders $99+
Secure Checkout
SSL encrypted · Visa, Mastercard, Amex, PayPal
Found it cheaper at another authorized Canadian retailer? Send us the offer.
Select your vehicle to check fitment.
This National Automatic Transmission Extension Housing Seal fits Chevrolet, GMC, Hummer vehicles.
2007-2019 GMC Sierra 3500 HD
2007 GMC Sierra 2500 HD Classic
2007 GMC Sierra 3500 Classic
2001-2019 GMC Sierra 2500 HD
2001-2006 GMC Sierra 3500
National 415988 Automatic Transmission Extension Housing Seal
National® has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.
Shop National Automatic Transmission Extension Housing Seal at Autrex with vehicle fitment details, current pricing, and checkout options for the National 415988. Eligible orders over $99 may qualify for free shipping, with some exceptions.
What customers say about buying from Autrex — service, shipping and support. These are reviews of the store, not of this specific part.
Couldn't locate the parts for 2013 Civic Si Sedan. Front struts are an Anomaly found them at Capital autoparts. Great service and great parts. Shipping by CanPar sucked however
Great customer service. I placed an order for wheels and tires and it was an easy transaction. Make sure you read the expected lead times for delivery however. I misread that part, but the order did arrive in the correct timeframe stated. The Hostile rims and Hercules tires look great. Thank you
Awesome
The National 415988 fits 10 vehicle applications including 2001-2019 Chevrolet Silverado 2500 HD, 2007-2019 Chevrolet Silverado 3500 HD, 2001-2019 GMC Sierra 2500 HD, 2007-2019 GMC Sierra 3500 HD, 2007 Chevrolet Silverado 3500 Classic and 5 more. Check the full fitment list above to confirm your vehicle.
Shipping options for the National 415988 are shown during checkout and may vary by item, address, and availability. Eligible orders over $99 may qualify for free shipping, with some exceptions. Call 1-866-461-2787 if you need help confirming shipping or pickup before ordering.
The National 415988 is currently listed at $45.00 CAD at Autrex. Final price, shipping, taxes, and availability are confirmed during checkout. Call 1-866-461-2787 if you need help before ordering.
Yes, the National Automatic Transmission Extension Housing Seal by National is designed as a direct fit replacement. Use our vehicle selector to confirm compatibility with your specific vehicle.
The National Automatic Transmission Extension Housing Seal comes with the standard National manufacturer warranty. Please check the product specifications for exact warranty terms.
