6 Best Jump Starters for Diesel Trucks (2026): 6.6L and 6.7L Picks

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Diesel engines are much harder to jump than gas engines. High compression means the starter motor pulls far more current, cold diesel oil is thick, and many heavy-duty pickups run two batteries that both need help when they are flat. A jump pack that easily starts a V6 sedan can click helplessly on a cold 6.7L. This guide compares six jump starters by their diesel ratings, starts per charge, cable quality and cold-weather behavior, so you can match one to your truck instead of guessing from the peak amp number.

Our Top Picks at a Glance

How We Chose These Diesel Jump Starters

We left out any pack whose manufacturer does not publish a diesel engine rating, because peak amps alone tell you very little about cranking a diesel. Then we compared specs, manuals and long-term owner feedback on five points:

• Published diesel rating that covers common truck engines (6.6L and 6.7L in heavy-duty pickups).
• Cable and clamp quality. Thick cables and solid copper jaws lose less power on the way to the battery.
• Starts per charge, because a diesel often needs more than one attempt in the cold.
• Safety: spark-proof and reverse-polarity protection, so a wrong connection does nothing.
• Durability for life in a truck cab or toolbox: housing rating, operating temperatures and warranty.

The Best Jump Starters for Diesel Trucks

1. NOCO Boost X GBX155: Best Overall for Diesel Trucks

The GBX155 is NOCO’s top “X” pack and the most capable lithium unit in this guide. NOCO rates it for diesel engines up to 8.0L and gas engines up to 10.0L, which leaves headroom over the 6.6L and 6.7L engines in today’s heavy-duty pickups. That headroom matters on a cold morning, when a pack working at its limit is the one that fails.

The other big strength is charging. Over USB-C Power Delivery it recharges in about 2.7 hours, and NOCO says five minutes of charging gives enough power for one jump even from an empty pack. It also works as a 60W USB-C power bank for phones, tablets and many laptops. NOCO quotes up to 18 starts per charge, and a 60-second timer manages the high-voltage output between attempts. At about 7 lb it fits behind a rear seat or in a toolbox.

Pros: highest diesel rating among lithium packs here, fast USB-C recharge, UltraSafe 2.0 clamps, 500-lumen light.
Cons: fewer starts per charge than the GB150.

Best for: owners of Duramax, Power Stroke and Cummins trucks who want the most margin.
Skip it if: you only own a light-duty 3.0L diesel; the GB70 is enough.

2. NOCO Boost GB150: Most Starts per Charge

The GB150 is the long-running heavy-duty pack from NOCO and still a favorite in work trucks. It is rated for diesels up to 7.0L and gas engines up to 9.0L, and NOCO quotes up to 80 starts per charge, by far the most here. That makes it a good choice if you jump other people’s trucks, run a small fleet, or keep it on a farm where it might be used several times before anyone remembers to charge it.

The housing is IP65 rated with rubber over-molding, the clamps are spark-proof with reverse-polarity protection, and the 500-lumen flashlight has seven modes. The trade-off is charging: about seven hours on the older charging design, so plan to recharge overnight.

Pros: up to 80 starts per charge, rugged IP65 housing, proven design.
Cons: slow seven-hour recharge; 7.0L diesel rating has less headroom than the GBX155.

Best for: fleets, farms and anyone who jumps vehicles often.
Skip it if: you need fast recharging.

3. TOPDON JS3000: Best Power Bank for Work

TOPDON is better known for scan tools, and the JS3000 is built in the same pro-tool style. It is rated for diesels up to 7.0L and gas up to 9.0L, uses 100% copper clamps and heavy-duty cables, and sits in an IP54 fire-resistant housing. TOPDON quotes up to 45 starts per charge and has a BOOST mode for batteries too flat for the clamps to detect.

Where it stands out is the power bank: a 24,000mAh pack with a 45W USB-C PD port that can charge a laptop, two USB QC 3.0 ports, and a 16.8V DC output. The hanging hook and folding stand are practical when you are working under a hood at night. Warranty is one year, shorter than NOCO’s.

Pros: copper clamps, large power bank with laptop charging, hook and stand, EVA case included.
Cons: one-year warranty; IP54 is less protection than NOCO’s IP65.

Best for: mechanics and contractors who also want a jobsite power bank.
Skip it if: long warranty coverage is a priority.

4. AstroAI A30: Best Diesel Jump Pack With Tire Inflator

Most jump starters with built-in compressors are rated for small diesels only. The A30 is an exception, rated for diesels up to 8.0L and gas up to 10.0L, with a 150 PSI, 35 L/min inflator and auto shut-off. If you want one box behind the seat for both a dead battery and a low tire, this is the only one here that is sized for a heavy-duty diesel.

AstroAI includes a 24-month warranty, two USB-C outputs and a screen that shows error codes. Keep one thing in mind: inflating large truck tires uses a lot of the pack’s charge. If the battery is weak and a tire is low, jump the truck first and inflate afterwards. Our guide to the best jump starters with air compressor compares it with other combo units.

Pros: 8.0L diesel rating plus a real tire inflator, 24-month warranty, 3.2 lb.
Cons: using the inflator reduces charge left for jumping.

Best for: diesel owners who want one tool for both problems.
Skip it if: you need many starts per charge for fleet use.

5. Clore Jump-N-Carry JNC770R: Best for Farms, Shops and Fleets

The JNC770R is a different kind of tool. Instead of a small lithium pack, it uses Clore’s sealed lead-acid PROFORMER battery, 68-inch #2 AWG welding-cable leads and heavy Powerjaw clamps that grip big diesel terminals and side-post batteries well. Clore rates it at 1700 peak amps and 425 cranking amps, and it has a built-in 3A automatic charger and a master on/off switch.

The long, thick cables are the reason shops like it: you can reach a battery on the far side of an engine bay or a tractor without moving the unit. The downsides are weight (about 23 lb) and the lack of spark-proof smart clamps, so you must connect it correctly yourself. Lead-acid packs also need regular charging to stay healthy.

Pros: long #2 AWG cables, strong clamps, built-in charger, simple and repairable.
Cons: heavy; no reverse-polarity protection on the clamps; must be kept charged.

Best for: repair shops, farms and fleets that jump trucks every week.
Skip it if: you want something to carry in the cab.

6. NOCO Boost GB70: Best for 3.0L Light-Duty Diesels

Not every diesel truck needs a heavy-duty pack. If you drive a half-ton with a 3.0L Duramax or EcoDiesel, or a diesel SUV, the GB70 is rated for diesels up to 6.0L and gas engines up to 8.0L. It weighs about 5 lb, delivers up to 40 starts per charge and has a 400-lumen light and IP65 housing. Compared with the GB150 it is lighter and easier to store, while still leaving real margin for a 3.0L engine.

We would not rely on it for a 6.6L or 6.7L heavy-duty diesel in cold weather, because those engines sit above its rating. Our portable jump starter roundup covers it alongside the smaller GB40.

Pros: plenty for 3.0L diesels, lighter than heavy-duty packs, NOCO safety.
Cons: six-hour recharge; not rated for heavy-duty diesel engines.

Best for: light-duty diesel pickups and SUVs.
Skip it if: your diesel is larger than 6.0L.

Which Size Fits Your Diesel?

All six picks are 12V units. Semi trucks and equipment that run 24V systems need a dedicated 12/24V jump starter.

How to Jump Start a Diesel Truck Safely

1. Turn off the key, lights, heater fan and any accessories.
2. Check your owner’s manual for the jump point. Many heavy-duty trucks have two batteries; the manual usually names the one to use (often the driver-side battery or a remote jump post).
3. Connect the red clamp to positive (+), then the black clamp to the negative (-) terminal or a bare metal ground.
4. Turn the key to ON and wait for the glow plug or “wait to start” light to go out. Skipping this step is the most common reason a diesel will not catch.
5. Crank for no more than five to ten seconds. If it does not start, wait one to two minutes so the pack and starter can cool, then try again.
6. Once it runs, remove the black clamp first, then the red, and let the engine idle so the alternator can recharge both batteries.

For the basics of cable order and cold-weather tips, see how to jump start a car safely.

Buying Guide: Choosing a Diesel Jump Starter

Use the diesel rating, not peak amps

Peak amps are measured differently by each brand, so a 3000A label on one pack may not equal 3000A on another. The diesel engine rating is the number to compare. Choose a pack rated at or above your engine size, and size up if you live somewhere cold.

Plan for two batteries

When both batteries in a dual-battery truck are flat, the pack has to push current into both while also cranking. That is exactly where extra rating and more starts per charge pay off.

Lithium vs lead-acid

Lithium packs are small, light and hold charge for months. Lead-acid units like the Clore are heavier but have long thick cables and suit shop use. For a truck cab, lithium is the practical choice.

Cold weather matters

Lithium packs lose output in deep cold. In winter, store the pack in the cab or bring it inside overnight when you expect to need it, and recharge every couple of months.

A jump will not fix a failing battery

If your truck needs a jump more than once, test both batteries and the alternator. One weak battery in a dual-battery truck drags the other down. A weak battery can also cause key fob and keyless start problems.

Related Guides

• 7 best portable jump starters for cars, trucks and SUVs
• Best jump starters with air compressor
• How to jump start a car safely
• Key fob not detected after a jump start