Plan d’maintenance Chevrolet Silverado 3500 HD II (GMT900, facelift 2011) Crew Cab Long Box

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📖Chevrolet Silverado 3500 HD II (facelift 2011) Crew Cab Long Box: the heavy fifth-wheel touring master

Chevrolet Silverado 3500 HD II (GMT900, facelift 2011) Crew Cab Long Box (2011-2014)

The comprehensive 2011 heavy-duty overhaul fundamentally elevated the Silverado 3500 HD. Featuring an all-new fully boxed high-strength steel frame, redesigned beefier front suspension, and larger brake discs, the GMT900 facelift transformed payload and towing stability. In Crew Cab Long Box form, this eight-foot-bed behemoth was engineered to dominate serious fifth-wheel and commercial plant haulage. Meticulous and preventive Chevrolet Silverado 3500 HD maintenance is imperative to keep its reinforced chassis and heavy-duty drivetrain operating at peak reliability.

Engine choices paired the reliable 6.0-litre Vortec L96 petrol V8 with the 6L90 transmission, while serious long-distance hauliers opted for the updated 6.6-litre Duramax V8 turbo-diesel LML generating 397 hp and 765 lb-ft of torque through a fortified Allison automatic transmission. The LML introduced selective catalytic reduction (SCR) using Diesel Exhaust Fluid (DEF/AdBlue), which enhanced combustion efficiency but introduced technical sensitivities regarding NOx sensors, tank heaters, and Bosch CP4.2 high-pressure fuel pumps vulnerable to contaminated or unlubricated diesel.

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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 fully boxed high-strength steel chassis introduced in 2011 significantly improves towing stiffness and directional stability.
The Duramax LML and fortified Allison 1000 transmission offer exceptional torque and robust integrated exhaust braking on descents.
Massive 8-foot load bed paired with a spacious Crew Cab provides unrivalled payload capacity for commercial and leisure trailering.
The Vortec L96 petrol V8 provides a rugged, lower-maintenance alternative for regional fleets not requiring diesel complexity.

Chronic weak spots

Keep an eye on

Duramax LML fuel system: inspect Bosch CP4 fuel pump health; fuel filter cleanliness is critical to avoid catastrophic injection system failure.
DEF and SCR emissions equipment: check DEF tank level sensors, heater elements, and NOx sensors for recurrent fault codes.
Allison 1000 transmission: inspect fluid quality, replace external spin-on filters regularly, and verify smooth gear shifts under full payload.
Dual rear wheel setup: examine inner wheel rims, inspect rear hub seals for oil leakage, and check tyre tread wear consistency.
Front wishbones and steering: inspect heavy-duty ball joints, torsion bar adjusters, and steering linkages for play after heavy towing.

Critical deadlines

Do not miss

Replace the Allison transmission spin-on filter and fluid every 40,000 km on vehicles frequently hauling heavy trailers.
Renew fuel filters every 15,000 to 20,000 km using premium OEM filtration to safeguard the sensitive CP4 common-rail fuel pump.
Service heavy-duty front and rear differential oils every 50,000 km to protect the high-stress ring and pinion assemblies.
Inspect and grease all front suspension joints, steering linkages, and prop-shaft slip yokes at every engine oil change.

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 3500 HD II (GMT900, facelift 2011) Crew Cab Long Box

Estimated average budget

Mid-range cost

Servicing a Chevrolet Silverado 3500 HD II (GMT900, facelift 2011) Crew Cab Long Box sits slightly above the market average (+24%).

Simple oil change~125 €

Full service~355 €

Front brake pads~170 €

Timing-belt kit~650 €

Tyres (set of 4)~495 €

* Indicative estimates for parts and labour.

Frequently asked questions about Chevrolet Silverado 3500 HD II (GMT900, facelift 2011) Crew Cab Long Box

What are the common problems on the Silverado 3500 HD II (GMT900, facelift 2011) Crew Cab Long Box?▾

Silverado 3500 HD II (GMT900, facelift 2011) Crew Cab Long Box owners should especially watch: Duramax LML fuel system: inspect Bosch CP4 fuel pump health; fuel filter cleanliness is critical to avoid catastrophic injection system failure. DEF and SCR emissions equipment: check DEF tank level sensors, heater elements, and NOx sensors for recurrent fault codes. Garajo includes these watch points so you can act early.

When should you change the timing belt on a Silverado 3500 HD II (GMT900, facelift 2011) Crew 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 3500 HD II (GMT900, facelift 2011) Crew Cab Long Box?▾

Garajo offers a free digital service book, always up to date, with reminders and a detailed history for your Chevrolet Silverado 3500 HD II (GMT900, facelift 2011) Crew Cab Long Box.

How much does it cost to service a Chevrolet Silverado 3500 HD II (GMT900, facelift 2011) Crew Cab Long Box?▾

The service budget for a Chevrolet Silverado 3500 HD II (GMT900, facelift 2011) Crew Cab Long Box sits slightly above the market average (+24%). 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 3500 HD II (GMT900, facelift 2011) Crew Cab Long Box powertrain is best for town use?▾

This model is only available as petrol/diesel. Fuel mix: 4 petrol versions ; 4 diesel versions. In town, petrol/LPG versions are usually the better match; diesel versions make more sense with regular long journeys.

Which Chevrolet Silverado 3500 HD II (GMT900, facelift 2011) Crew Cab Long Box powertrain should you choose if you mostly drive on the motorway?▾

This model is only available as petrol/diesel. Fuel mix: 4 petrol versions ; 4 diesel versions. 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 3500 HD II (GMT900, facelift 2011) Crew Cab Long Box?

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

15W-40 for Chevrolet Silverado 3500 HD II (GMT900, facelift 2011) Crew Cab Long Box

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

5W-30 for Chevrolet Silverado 3500 HD II (GMT900, facelift 2011) Crew Cab Long Box

Capacity : 5.7 lGM dexos 1

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

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