Plan d’maintenance Chevrolet Silverado 2500 HD II (GMT900, facelift 2011) Extended Cab Long Box

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📖Chevrolet Silverado 2500 HD II facelift Extended Cab Long Box: the long-range commercial freighter

Chevrolet Silverado 2500 HD II (GMT900, facelift 2011) Extended Cab Long Box (2011-2014)

With the 2011 chassis transformation, the Extended Cab Long Box took on its most formidable commercial form. Featuring rear-hinged clamshell access doors, secondary rear jump seats, and an expansive eight-foot cargo bed on a heavy-duty boxed chassis, it was purpose-built for contractors, utility companies, and agricultural operators needing maximum load volume. Methodical Chevrolet Silverado 2500 HD maintenance is essential to protect its robust frame and heavy running gear against the rigours of commercial service.

Beneath the bonnet, the 6.0-litre L96 petrol V8 serves fleets requiring simple mechanics, while the 6.6-litre Duramax V8 turbo-diesel LML paired with the six-speed Allison automatic transmission delivers exceptional pulling capability for heavy machinery. The eight-foot bed and extended wheelbase provide reassuring directional stability when pulling long trailers, but they place high torsional demands on the two-piece prop-shaft centre bearing, chassis crossmembers, and the rear leaf-spring assembly.

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Entrez votre number plate d’number plate afin de suivre freeement votre Silverado 2500 HD II (GMT900, facelift 2011) Extended Cab Long Box

Garajo prépare votre garage et vous permet ensuite de suivre les maintenances, les rappels et les points à surveiller.

Owner notes

The reassuring points, known weak spots and deadlines you should not let slip.

Reassuring points

Reliability

The eight-foot cargo bed accommodates large plant machinery, pallets, and building materials without tailgate overhang.
The 6.0-litre L96 petrol V8 offers low maintenance complexity and proven durability for low-mileage commercial duties.
The Duramax LML and Allison 1000 powertrain provides superior towing torque and seamless motorway cruising under heavy load.

Chronic weak spots

Keep an eye on

Extended Cab doors: check lower latch mechanisms, weather stripping, and door alignment to prevent wind noise and water ingress.
Duramax LML fuel delivery: inspect fuel filter replacement records and check the Bosch CP4 pump for signs of fuel starvation or metallic debris.
DEF and SCR emissions: monitor the urea tank heating element, fluid level sensors, and watch for recurring DEF system warning lamps.
Allison 1000 and driveline: check the two-piece prop-shaft centre support bearing, universal joints, and evaluate shift quality under load.
Chassis crossmembers: inspect the rear bed mounting brackets, frame rail welds, and tow hitch assembly for fatigue cracking or rust.

Critical deadlines

Do not miss

Any fuel starvation symptom or metallic flecks in the fuel bowl on the LML must be investigated immediately before injectors are ruined.
Persistent DEF tank heater or SCR system error codes must be repaired promptly to prevent the truck entering a 5 mph limp speed restriction.
Scheduled fluid replacements for the Allison gearbox, transfer case, and heavy differentials are mandatory on trucks towing commercial plant.
Worn prop-shaft bearings, loose steering idler arms, or fatigued rear leaf springs must be overhauled before transporting maximum cargo.

Fréquences d'maintenance recommandées

Service markers for petrol/diesel versions. Exact intervals vary by engine and model year.

Oil change

Every 15 000 km

Every 1 year

Service

Every 15 000 km

Every 1 year

Brake pads

Every 30 000 km

Every 2 years

Poids ou puissance élevés : usure des number platettes accélérée sur certaines versions

Timing belt / chain

Every 100 000 km

Every 5 years

Battery (12 V)

Every 50 000 km

Every 4 years

Powertrains and average consumption

Average consumption from manufacturer data for the versions available in this generation.

Petrol and diesel powertrains

▾

Petrol, diesel or LPG versions. The intervals shown cover the usual mechanical jobs.

Silverado 2500 HD II (GMT900, facelift 2011) Extended Cab Long Box

Estimated average budget

Mid-range cost

Servicing a Chevrolet Silverado 2500 HD II (GMT900, facelift 2011) Extended Cab Long Box sits slightly above the market average (+30%).

Simple oil change~115 €

Full service~355 €

Front brake pads~170 €

Timing-belt kit~650 €

Tyres (set of 4)~590 €

* Indicative estimates for parts and labour.

Frequently asked questions about Chevrolet Silverado 2500 HD II (GMT900, facelift 2011) Extended Cab Long Box

What are the common problems on the Silverado 2500 HD II (GMT900, facelift 2011) Extended Cab Long Box?▾

Silverado 2500 HD II (GMT900, facelift 2011) Extended Cab Long Box owners should especially watch: Extended Cab doors: check lower latch mechanisms, weather stripping, and door alignment to prevent wind noise and water ingress. Duramax LML fuel delivery: inspect fuel filter replacement records and check the Bosch CP4 pump for signs of fuel starvation or metallic debris. Garajo includes these watch points so you can act early.

When should you change the timing belt on a Silverado 2500 HD II (GMT900, facelift 2011) Extended Cab Long Box?▾

The timing belt is usually replaced every 100,000 km or 5 years on this type of engine.

Where can I find the service book for the Chevrolet Silverado 2500 HD II (GMT900, facelift 2011) Extended Cab Long Box?▾

Garajo offers a free digital service book, always up to date, with reminders and a detailed history for your Chevrolet Silverado 2500 HD II (GMT900, facelift 2011) Extended Cab Long Box.

How much does it cost to service a Chevrolet Silverado 2500 HD II (GMT900, facelift 2011) Extended Cab Long Box?▾

The service budget for a Chevrolet Silverado 2500 HD II (GMT900, facelift 2011) Extended Cab Long Box sits slightly above the market average (+30%). Allow about 355 € for a full service, for example. Garajo estimates your budget by powertrain and tracks what you actually spend, for free.

Which Chevrolet Silverado 2500 HD II (GMT900, facelift 2011) Extended Cab Long Box powertrain is best for town use?▾

This model is only available as petrol/diesel. Fuel mix: 2 petrol versions ; 2 diesel versions ; 1 LPG version. In town, petrol/LPG versions are usually the better match; diesel versions make more sense with regular long journeys.

Which Chevrolet Silverado 2500 HD II (GMT900, facelift 2011) Extended Cab Long Box powertrain should you choose if you mostly drive on the motorway?▾

This model is only available as petrol/diesel. Fuel mix: 2 petrol versions ; 2 diesel versions ; 1 LPG version. For regular motorway use, diesel versions of this model are usually the best fit (range and refinement at a steady speed).

Compatible engine oil

Which engine oil for Chevrolet Silverado 2500 HD II (GMT900, facelift 2011) Extended Cab Long Box?

These links are limited to the engines of this generation when oil data is available.

5W-30 for Chevrolet Silverado 2500 HD II (GMT900, facelift 2011) Extended Cab Long Box

Capacity : 5.7 lGM dexos 1

15W-40 for Chevrolet Silverado 2500 HD II (GMT900, facelift 2011) Extended Cab Long Box

Capacity : 9.5 lAPI CJ-4API CK-4 15W-40

Unsure between two viscosities?5W-30 vs 5W-40 0W-20 vs 5W-30 5W-30 vs 0W-30

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