Docs Diesel Oil Filter D11878 Compatible with Chevrolet GMC 6 6L Duramax 2500HD 3500HD 2020 Replaces PF26

4.6(65)

370+ bought in the past month

$13.99

About this item

DOC'S DIESEL OIL FILTERS - Doc's Diesel Premium Oil Filters are built to deliver reliable performance for hard-working trucks. They filter out dirt, metal, and other debris from your oil, helping protect your engine and improve fuel efficiency. They’re made for synthetic, conventional, or blended oils, with high-flow synthetic media and a heavy-duty metal housing for longer life and better filtration. Changing your filter regularly keeps your motor running smoothly and helps prevent overheating.
FITMENT - Compatible with Chevrolet/GMC 6.6L Duramax 2500HD, 3500HD 2020-2025
INTERCHANGE - Replaces GM 12684038, Replaces AC/Delco PF26, Replaces Wix WL10454, Replaces Baldwin B7449, Replaces Premium Guard PG9952EX
THIRD PARTY TESTED - 25 Micron @ 99% Efficiency Rating
REPLACEMENT GUIDELINES - Above all recommendations, change according to your vehicle’s manufacturer's warranty. Oil Filters should be changed every 5,000-7,000 miles or 10,000-15,000 miles maximum.

$13.99

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Product details

Brand	Doc's Auto Parts
Material	Synthetic, Metal
Product Grade	Replacement Part
Vehicle Service Type	Truck
Thread Size	17mm

From the brand

Customer reviews

4.665 ratings

★★★★★

Looks wrong but it’s right.

ck—January 19, 2026✓ Verified purchase

5 stars so far. I ordered this for a 24 Silverado 2500hd with the 6.6 Duramax. The filter is much fatter and a little shorter but it is the right filter for the truck. I should’ve taken a picture but I forgot. Read more

★★★★★

Good quality

Customer—December 2, 2025✓ Verified purchase

1st time user, I’ll let you know in 5k miles! Read more

★★★★★

Cost, better than OEM.

Customer—October 21, 2025✓ Verified purchase

Docs Diesel is the best!! These filters are great! Read more

★★★★★

Works great

Phil—November 2, 2025✓ Verified purchase

Works Read more

★★★★★

Right-size

COLEEN—October 23, 2025✓ Verified purchase

😀 Read more

★★★★★

Works well on the 3500 chev

Fred Wagner—July 11, 2025✓ Verified purchase

One of the very best filters Read more

★★★★★

cost

Kathleen A. Collins—June 16, 2025✓ Verified purchase

great product Read more

★☆☆☆☆

Poor quality

21 Silverado—February 10, 2026✓ Verified purchase

I purchased 2 of these filters for my 2021 Duramax. When I opened the first one I noticed loose wire mesh inside the filter. Very poor quality look elsewhere. Read more