Exergy 06-07 Chevrolet Duramax 6.6L LBZ Sportsman CP3 Pump (LBZ Based)
If your 2006 or 2007 Silverado or Sierra HD with the LBZ Duramax is throwing P0087, losing power on a grade, or taking too long to start, the high-pressure pump is one of the first parts to check. The Exergy Sportsman E04 10305 is a brand-new, upgraded CP3 for the LBZ. It drops in where the factory pump came out, it runs on the stock calibration, and it gives an LBZ that already has a tune or bigger injectors more fuel at the top of the rev range than an original pump can make.
The LBZ keeps the Bosch common-rail layout GM used across the 2001-2010 Duramax family. The CP3 is driven off the engine's gear train and turns fuel from the supply side into rail pressure for both banks. Inside, three plungers do the work, and an inlet metering valve, often called the MPROP, opens and closes to let the engine computer hold the pressure it wants. Most LBZ pumps that go bad do it slowly: the plungers and valves wear, internal leakage rises, and the pump can still idle the truck fine but cannot keep up when the throttle is pinned.
The Sportsman is Exergy's answer for that truck. It uses higher-flowing valves that Exergy says outlast stock, and it keeps increasing flow beyond about 3,000 RPM, where a factory pump flattens out. Exergy rates the Sportsman from stock power up to 650 horsepower or more, and every pump is tested across its range up to 4,500 RPM and 29,000 psi before it ships.
P0087 on an LBZ is often a supply problem, not a pump problem. A plugged filter, air leaking in at the filter head, or a failed MPROP can all starve a good CP3. Measure supply pressure, inspect the filter, and watch MPROP current on a scan tool before condemning the pump. Remember the Allison 1000 behind the LBZ can make a truck feel down on power too. If it flares between gears or goes into a fixed gear, start with our Allison 1000 limp mode guide, and if you only feel a vibration at steady speed, read the Allison TCC shudder guide.
Our listing covers 2006-2007 Chevrolet Silverado and GMC Sierra 2500 HD and 3500 with the 6.6L LBZ, part number E04 10305. Exergy cross-references it to Bosch 0 445 020 037, 0 445 020 105 and 0 986 437 332, and GM 97780161, 97720662, 97361351 and 8973613516. Those same numbers carry over to the later LMM, and Exergy's own chart for this pump also lists later 6.6L Express and Savana vans, so match the number on your old pump or send us the year and VIN. If your 2007 is a new-body truck with the LMM, look at the LMM version instead. All Duramax fuel parts are under engine performance, and the transmission behind it is covered on our Allison 1000 parts page.
If you plan to add tuning later and want more headroom, Exergy also makes the 10mm stroker CP3 for the LBZ.
| Brand | Exergy |
| Part number | E04 10305 |
| Fits | Exergy 06-07 Chevrolet Duramax 6.6L LBZ Sportsman CP3 Pump (LBZ Based) |
| Vehicle fitment | Chevrolet Duramax (2006-2007) |
| Type | Injection Pumps & Controllers |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
The 2007 Classic body trucks used the LBZ, so yes. A 2007.5 new-body truck with the LMM should use the LMM Sportsman instead. Send us the VIN if you are unsure.
Yes. Exergy says the Sportsman needs no significant supporting mods or tuning, and it covers stock power up to about 650 horsepower.
A lift pump is not required. For maximum output Exergy recommends 150 GPH at 8-10 psi at the pump.
Check supply first. A restricted filter, air in the system or a bad MPROP will set P0087 with a healthy CP3. If supply is good and actual rail pressure still falls behind desired, the pump is the likely cause.
Exergy lists Bosch 0 445 020 037, 0 445 020 105 and 0 986 437 332, plus GM 97780161, 97720662, 97361351 and 8973613516.
