General Motors LC8
Built: 2012-2013 · Series: Other models
More machines from model year 2012
General Motors – other heavy-duty road engines: the collective page of EPA-certified units for heavy US commercial vehicles outside the named ranges, 243 to 350 hp, petrol and diesel, 4.8 to 6.6-litre displacement
General Motors gathers on this collective page engines for heavy US commercial vehicles and vans that the register could not assign to a named range. The group, headquartered in Detroit, was founded in 1908 and is one of the world's largest carmakers. The units listed here carry the factory designations 350, L20, L8T, L96 and LC8; the EPA engine-family codes, such as TGMXE06.6001 or CGMXE04.8581, encode displacement from 4.8 to 6.6 litres.
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The register lists here 5 versions with 243 to 350 hp rated output at 2,500 to 4,500 rpm. Four of the five engines run on petrol, one on ultra-low-sulphur diesel; injection is sequential fuel injection on three engines and direct injection on two. Maximum torque ranges from 284 to 750 Nm at 1,400 to 4,500 rpm, the certification model years range from 2012 to 2026.
Engines of these designations power heavy pickups, chassis-cab platforms and vans sold under the Chevrolet and GMC brands in the North American market; the parallel listing of petrol and diesel versions with a similar engine-family scheme shows GM's typical dual-fuel strategy in the heavy segment.
When buying used, operating hours and service history count, on the petrol versions the condition of spark plugs and injectors, on the diesel version the injection system and exhaust aftertreatment, plus the cooling system and the condition of the engine mounts; since these engines in heavy commercial vehicles are often run under trailer load, it is worth checking the clutch or automatic transmission and its cooling. Spares and service run through the GM authorised workshop network.
Sources: SpecCodex register, model data: General Motors (weitere Heavy-Duty-Straßenmotoren), General Motors (manufacturer)
Technical data
Engine
| Engine code | 75; 85correct |
|---|---|
| Engine family | CGMXE06.0584; DGMXE06.0584; EGMXE06.0584; FGMXE06.0584; GGMXE06.0584correct |
| Engine families | CGMXE06.0584; DGMXE06.0584; EGMXE06.0584; FGMXE06.0584; GGMXE06.0584correct |
| Fuel | petrolcorrect |
| Rated output | 218.5 kW (= 293 bhp)correct |
| Rated speed | 4,300 rpmcorrect |
| Maximum torque | 368 ft·lbfcorrect |
| Speed at max. torque | 4,000 rpmcorrect |
| Operating cycle | petrol enginecorrect |
| Injection | sequential injectioncorrect |
| Aspiration | naturally aspiratedcorrect |
Origin and approval
| Built from | 2012correct |
|---|---|
| Built to | 2016correct |
| Model year from | 2012correct |
| Model year to | 2016correct |
Other data
| Application | HDG 1 (<=14k lbs)correct |
|---|
Frequently asked questions
How much power does the General Motors LC8 have?
The General Motors LC8 delivers 218 kW.
When was the General Motors LC8 built?
Production years: 2012-2013.
What to check before buying
- Match the data plate against the order: frame size, mounting and rating have to agree.
- For used units, ask about winding condition and bearing play.
- Ask about parts availability for this series — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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This page carries 19 individual figures for this model. They come from 2 recorded sources; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
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Other models in this series
Sources: US EPA — engine certification data (retrieved August 2026) · How we check the data
Diesel engine in 3D section
Turn the model, look inside and click an assembly — each one is explained.
Parts for this engine (13)
Manufacturer part numbers from the official EPA documentation. No prices or availability — those come from the supplier.
| Part number | Description | Manufacturer |
|---|---|---|
| 12643512 | ECM / Motorsteuergerät | General Motors |
| 12644904 | ECM / Motorsteuergerät | General Motors |
| 12647990 | ECM / Motorsteuergerät | General Motors |
| 12649297 | ECM / Motorsteuergerät | General Motors |
| 12653784 | ECM / Motorsteuergerät | General Motors |
| 12654015 | ECM / Motorsteuergerät | General Motors |
| 12656197 | ECM / Motorsteuergerät | General Motors |
| 12658390 | ECM / Motorsteuergerät | General Motors |
| 12658777 | ECM / Motorsteuergerät | General Motors |
| 12613412 | Fuel Injector | General Motors |
| 12572706 | HO2S | General Motors |
| 12612797 | HO2S | General Motors |
| 12572705 | O2 Sensor Switching | General Motors |
Source: 2012 Model Year On-Highway Heavy-Duty Engine Certification Data
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