Hand pump that threads into a 15 to 55 gallon drum and pulls ATF or motor oil at 10 fluid ounces per stroke, no siphon needed.
A shop that services heavy-duty pickups goes through transmission fluid by the case, and at some point it becomes cheaper and cleaner to buy it by the drum. The catch is getting fluid out of a full 55 gallon drum without tipping it. This lever-action barrel pump threads into the drum bung, reaches the bottom with a telescoping suction tube, and moves about 10 fluid ounces per stroke, so a 5 quart jug fills in roughly sixteen pulls.
The pump does not fill a transmission directly. Its job is the step before that: moving clean fluid from bulk storage into a measured container or into the tank of a pressurized fill pump. That matters most on the high-capacity units. GM's 2025 capacity chart lists a fluid change on the 10L1000 in the 2020-up Silverado and Sierra HD at 13.6 liters, about 14.4 quarts, and overhaul fills on its van and medium-duty units run past 12 quarts. Pouring that out of quart bottles is slow, expensive and leaves a bin full of empties. GM itself lists its DEXRON HP fluid in a 55 gallon drum in bulletin 18-NA-355, which tells you how dealers handle volume.
Count fill volume, not jobs. One 10L1000 service uses most of four gallons, while a car with a 6-quart unit uses well under two. If your bays see the same fluid spec week after week, a drum plus this pump pays back fast. Before buying the drum, confirm the exact spec for the trucks you see most; our Allison 1000 fluid and filter service specs and 4L80E fluid type and capacity guides cover two of the most common heavy-duty units, and the wrong fluid in a drum is the wrong fluid in every truck you fill from it.
The pump threads into the bung on standard 15 to 55 gallon drums and is built for non-corrosive oils: automatic transmission fluid, motor oil and heating oil. It is not for water, diesel, gasoline or any corrosive fluid, which attack the seals and steel body. It is a shop tool and fits no particular vehicle; what matters is which fluid you put through it. If you service late-model Duramax trucks, the 10L1000 service kit with DEXRON ULV and filters gives you the filters and fluid for one truck without committing to a drum.
Kit includes the pump, telescoping suction tube, thread seal tape, two wrenches and a fitted storage case. Weight is about 5 lb.
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No. It is a drum transfer pump. Fill a clean measured container or the tank of a fill pump, then add fluid through the transmission's fill port with the proper adapter.
Non-corrosive oils: automatic transmission fluid, motor oil and heating oil. Do not use it with water, diesel, gasoline or corrosive fluids, which will damage the seals and steel body.
About 10 fluid ounces per stroke, so roughly sixteen strokes fill a 5 quart jug. Thicker oil in a cold shop pumps a little slower.
Yes. The suction tube telescopes to suit 15 to 55 gallon drums. Set it just above the floor of the drum so sediment stays behind.
It is better not to. GM warns that intermixing fluids dilutes the new fluid. Use one pump per drum spec, or drain and clean it thoroughly before switching.
GM lists the 10L1000 fluid change in 2020-up Silverado and Sierra HD trucks at 13.6 liters, about 14.4 quarts, which is why shops servicing these trucks often buy fluid by the drum.
