Doc’s Diesel Duramax ULV is the trusted choice for rugged reliability and long-haul peace of mind. Engineered for heavy-duty demands, this ultra-low-viscosity formula delivers dependable protection, smooth performance, and long-term durability across tough operating conditions.
Product Details:
Full synthetic formulation with improved cold flow and oxidation resistance
Corrosion inhibition that helps protect internal components from rust and breakdown
Wear protection that maintains viscosity under extreme stress and temperature
Ultra low viscosity for ideal flow, smooth operation, and consistent performance in all conditions
Fitment:
Vehicle Fitment:
2020–2026 Chevrolet/GMC Silverado/Sierra 3.0L Duramax 1500, 2500HD, and 3500HD with 10-speed transmissions
Doc's Part Number:
DOCSDEXULV-55G
Change Interval:
Above all recommendations, change according to your vehicle’s manufacturer's warranty.
Transmission Fluid:
Normal Duty: Every 60,000 to 100,000 miles maximum
Severe Duty: Every 30,000 to 50,000 miles maximum
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Address frequently asked questions about this product to minimize any concerns or uncertainties that might deter a customer from making a purchase.
Does it come with a warranty?
Yes, most products we sell are backed by the manufacture's warranty. Warranty coverage varies by brand, so check the product listing or contact us if you have any questions before purchasing.
What happens if I don't like it?
If you're not completely satisfied, we're here to help. Eligible unused items may be returned within 30 days of delivery, subject to our return policy and applicable restocking fees.
How fast is shipping?
We process most orders within 1-2 business days. Shipping times vary by product availability and location, but most customers receive their orders within 3-7 business days after they ship.
What's the returns policy?
Returns must be requested within 30 days of purchase, Items must be new, unused, and in their original packaging. Approved returns are subject to a 30% restocking fee. Custom order, electrical, and special order items may not be eligible for return.
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