Garrett / AiResearch Turbochargers

Stage 1 Turbocharger - 2004.5-2010 GM 6.6L LLY LBZ LMM 6.6L Duramax 773540-5001

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MPN: 773540-5001
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Garrett PowerMax Stage 1 GT3794VA Performance Turbo - 04.5-10 Duramax

Part # 773540-5001

Suitable for stock replacement. OEM Part# 12639460

Complete drop-in performance upgrade Garrett turbocharger kit that provides extra flow for engines producing up to 500 hp. Advanced GT-series wheel designs deliver excellent performance, lower back pressure and reduced intake and exhaust gas temperatures. The GT3794VA features Advanced Variable Nozzle Turbine (AVNTTM) design for increased compressor and turbine flow.

Turbocharger Performance and DTC P2563
DTC P2563 typically occurs on vehicles that are driven at high temperatures and towing heavy loads. P2563 sets when the ECM detects the turbocharger actual and desired vane positions are not tracking. When this happens, the turbo unison ring will stick in a high turbo boost request position while the ECM requests a lower vane position and/or a lower turbo boost pressure. Due to the vanes sticking in a high turbo boost position there may not be any loss of power noticed before the P2563 sets. Once the turbo vanes begin to stick, then it is suggested that the turbocharager assembly be replaced.

It should be noted that DTC P0108 (MAP sensor) may also be set along with P2563. It may not be necesarry to replace the MAP sensor if P0108 has set along with P2563. We suggest replacing the turbocharger and clearing your codes. If P0108 persists, then you may have to replace the MAP sensor.

Also remember to check for kinked or damaged turbo oil feed lines, as that could also cause the turbo unison ring to stick.

WARNING : This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to