• Garrett PowerMax GT3788V Turbocharger Kit - 6.6L Duramax LML | 2011-2014 GMC Sierra 3500 - Stateside Performance - Turbochargers - Garrett - Garrett PowerMax GT3788V Turbocharger Kit - 6.6L Duramax LML | 2011-2014 GMC Sierra 3500
  • Garrett PowerMax GT3788V Turbocharger Kit - 6.6L Duramax LML | 2011-2014 GMC Sierra 3500 - Stateside Performance - Turbochargers - Garrett - Garrett PowerMax GT3788V Turbocharger Kit - 6.6L Duramax LML | 2011-2014 GMC Sierra 3500
  • Garrett PowerMax GT3788V Turbocharger Kit - 6.6L Duramax LML | 2011-2014 GMC Sierra 3500 - Stateside Performance - Turbochargers - Garrett - Garrett PowerMax GT3788V Turbocharger Kit - 6.6L Duramax LML | 2011-2014 GMC Sierra 3500
  • Garrett PowerMax GT3788V Turbocharger Kit - 6.6L Duramax LML | 2011-2014 GMC Sierra 3500 - Stateside Performance - Turbochargers - Garrett - Garrett PowerMax GT3788V Turbocharger Kit - 6.6L Duramax LML | 2011-2014 GMC Sierra 3500
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GRT886976-5004S

Garrett

Garrett PowerMax GT3788V Turbocharger Kit - 6.6L Duramax LML | 2011-2014 GMC Sierra 3500

Garrett PowerMax GT3788V Turbocharger Kit - 6.6L Duramax LML | 2011-2014 GMC Sierra 3500

$3,069.81 USD
$3,069.81 USD
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Shipping calculated at checkout.

The Garrett PowerMax GT3788V Turbo Kit fits the 2011-2014 GMC Sierra 3500 6.6L Duramax LML and delivers a bolt-on turbo upgrade for more airflow and boost response.

Install Difficulty: Professional Install Only
Turbocharger replacement requires removing exhaust and intake plumbing, coolant and oil line service, and VGT calibration; typically takes 6-8 hours on a vehicle lift. Professional ECU tune required to safely support the new turbo.

Product Overview

This is a direct-replacement upgraded turbocharger built on Garrett's PowerMax GT3788V platform for the LML Duramax.

It increases compressor and turbine flow over the factory unit to support higher horsepower and towing loads.

Designed as a drop-in fitment for the 2011-2014 GMC Sierra 3500 6.6L Duramax, it uses the OE variable-vane control strategy for stock-like drivability with more power on tap.

Features & Specifications

  • Fits: 2011-2014 GMC Sierra 3500
  • Fits 6.6L Duramax LML diesel only
  • Garrett PowerMax GT3788V platform
  • Direct bolt-on replacement for factory turbocharger
  • Upgraded compressor and turbine wheels for higher airflow
  • Variable geometry turbine retains factory-style drivability
  • Supports increased horsepower and towing capability
  • Professional tune recommended -- this forced-induction component changes airflow and boost, so proper ECU calibration is recommended to safely realize its performance and avoid lean or over-boost conditions.

Fitment

This part fits the following vehicles:

Year Make Model Submodel
2011-2014 GMC Sierra 3500 All
⚠ Submodel Fitment: If your submodel is not listed in the fitment table above, we cannot confirm fitment. Please contact us before purchasing to verify.

Shipping & Returns

Tracking is typically provided within 3–5 business days; items shipping direct from the manufacturer may take 5–7. Some items are made to order or may be backordered. Questions about stock? Reach us through live chat or email.

Warranty

All warranties are through the manufacturer and are facilitated by Stateside Performance. Some manufacturers require the end user to contact them directly; in that case we will point you to the right contact. Email us with any warranty questions.

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  • 30-day returns

    Returns must be requested within 30 days of delivery. Parts must be new, unused, uninstalled, and in original packaging, with an RMA. Some items are final sale.

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