Garrett 848212-5002S GT3788VA | LML Duramax

11-16 LML Duramax 6.6L Garrett Stock Replacement Turbo

Garrett 848212-5002S GT3788VA New Turbo - 2011-2016 LML Duramax

$1,456.76

Part Number: 848212-5002S
Est. Ship Time: Usually Ships By Next Business Day

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Gasket Kit Sold Separately
The AP0165 turbocharger installation gasket kit is not included with this unit. Source the AP0165 install kit separately before beginning the swap.

The Garrett 848212-5002S GT3788VA is a brand-new OE stock replacement turbocharger for 2011-2016 Chevrolet Silverado and GMC Sierra 2500HD and 3500HD with the 6.6L LML Duramax engine. It drops in with no modification required, delivers enhanced airflow compared to the LMM-generation turbo, and features a revised center housing with three cobalt pins for improved vane actuation. No core charge required.

The Garrett 848212-5002S is a brand-new GT3788VA stock replacement for 2011-2016 LML Duramax Silverado and Sierra 2500HD/3500HD trucks; it is a direct drop-in with no tuning required, requires no core return, and is backed by a 1-year Garrett warranty. Gaskets are sold separately.

Buy this if...

Your 2011-2016 LML Duramax needs a stock turbo replacement and you want a brand-new Garrett unit - not rebuilt, not remanufactured
You want a direct drop-in with no tuning or modifications required to restore factory boost behavior
You want factory-spec variable geometry performance restored without the premium of a performance upgrade

Do not choose this if...

Your build is tuned or modified and you want more airflow headroom - see the 886976-5004S PowerMax Stage 1 instead
Your engine code is outside the LML - verify your VIN before ordering

Verify before ordering...

Engine code is LML - 2011-2016 Silverado/Sierra 2500HD/3500HD only
AP0165 install kit sourced separately before starting the swap

Stock Replacement or PowerMax Upgrade - Which Is Right?

The 848212-5002S restores factory LML boost behavior and VGT operation with no tuning required - the correct choice for a stock or mildly used truck focused on a clean OE-spec repair. If your LML is tuned or modified and you want additional airflow headroom beyond stock, the 886976-5004S PowerMax Stage 1 supports up to 600 WHP in the same stock-location drop-in format. Stay with the 848212-5002S if factory-spec restoration is the goal and no core return is a priority. Confirm your engine code is LML, then this is the correct part to order.

Condition: 100% brand new - not rebuilt or remanufactured

No Core Required: Brand-new unit with no core return or deposit

Warranty: 1 year - Garrett-backed

Tuning Required: None - direct bolt-on stock replacement

What the Revised Center Housing Changes

The 848212-5002S incorporates Garrett's latest engineering updates for the LML platform. The revised center housing features three cobalt pins added to reduce housing distortion and improve vane actuation accuracy. This design improvement over earlier-production units contributes to more consistent VGT performance across the service life of the turbo. The LML unit also features an enhanced compressor design that delivers improved airflow compared to the LMM-generation turbocharger it supersedes.

848212-5002S Technical Specs

Confirm part number and engine code before ordering. This turbo is built specifically for the LML engine family.

Part Number	848212-5002S
Turbo Model	GT3788VA
Fitment	2011-2016 Chevrolet Silverado 2500HD / 3500HD and GMC Sierra 2500HD / 3500HD - 6.6L LML Duramax
Compressor Wheel	61mm x 88mm - 11 blade
Turbine Wheel	73mm x 64mm - 13 blade
Variable Geometry	Yes - VGT
Center Housing	Revised design with 3 cobalt pins - reduces distortion, improves vane actuation
Condition	Brand new - not remanufactured
Tuning Required	None
Gasket Kit	Sold separately - AP0165
Core Charge	None - no core return required
Warranty	1 year - Garrett-backed
Replaces GM OE Numbers	12642314, 12642129
Replaces Garrett Numbers	800799-0002, 800799-0003

LML engine code confirmed and looking for a factory stock-spec replacement? This is the correct Garrett unit to order.

Avoid These Common Ordering Mistakes

Assuming gaskets are included: The AP0165 installation gasket kit is sold separately. Source it before beginning the swap - installing without fresh gaskets risks boost leaks after the new turbo is seated.
Ordering this for a performance build: The 848212-5002S restores factory stock boost behavior. If your LML is tuned and you need airflow headroom beyond stock, the PowerMax Stage 1 is the correct upgrade path - not this part.
Wrong engine code: This turbo is for the LML engine code only. The LML covers 2011-2016 Silverado/Sierra 2500HD/3500HD. Verify your VIN 8th character is 8 (LML) before ordering.

Before You Order - Final Confirmation

Engine code confirmed: LML - 2011-2016 Silverado/Sierra 2500HD/3500HD
Build goal confirmed: Factory stock-spec restoration, no tuning required
AP0165 install kit ordered separately for gaskets

For a 2011-2016 LML Duramax Silverado or Sierra with a factory stock-spec restoration goal, the 848212-5002S is the correct brand-new Garrett GT3788VA to order - revised center housing, cobalt VGT pins, no tuning required, no core needed.

Frequently Asked Questions

Click or tap a question below to expand the answer.

Will the 848212-5002S fit my 2013 Chevrolet Silverado 2500HD 6.6L LML?

Yes. The 848212-5002S fits 2011-2016 Chevrolet Silverado 2500HD and 3500HD with the 6.6L LML Duramax engine. Verify your VIN confirms the LML engine code before ordering.

Does the 848212-5002S require tuning after installation?

No. The 848212-5002S is a direct stock replacement - no tuning or custom calibration is required. It is a bolt-on swap that restores factory boost behavior on the LML Duramax.

Does the 848212-5002S include gaskets for installation?

No. Gaskets are sold separately. The AP0165 Alliant Power turbocharger installation kit is the correct gasket kit for this application. Source the AP0165 install kit separately before beginning the swap.

What is the difference between the 848212-5002S and the 886976-5004S PowerMax?

The 848212-5002S is a factory stock-spec replacement that restores original LML boost behavior with no tuning required. The 886976-5004S PowerMax Stage 1 is a performance upgrade with a forged fully-machined compressor wheel, 19% more flow than OEM, and support for up to 600 WHP with modifications and tuning. Both drop in to the same stock location. Choose the 848212-5002S for factory restoration; choose the PowerMax if your build has progressed beyond stock fueling.

Does 12642129 replace the 848212-5002S on a 2011-2016 LML Duramax?

Yes. GM OE number 12642129 is a confirmed cross-reference for the 848212-5002S. GM OE number 12642314 is also confirmed. If your existing turbo, dealer invoice, or purchase order shows either of those numbers, the 848212-5002S is the correct new Garrett replacement.

What warranty does the Garrett 848212-5002S come with?

The 848212-5002S is backed by a 1-year Garrett warranty covering defects in materials and workmanship. This is a brand-new unit - no core return is required.