AMDP 2021-2024 3.0L SUV LM2 Duramax** DO NOT DELETE YOUR VEHICLE UNTIL TUNING HAS BEEN PERFORMED AND TESTED ** REQUIRES AN MPVI4 DEVICE, UNLOCKED ECM (SENT TO AND RECEIVED BACK FROM HP TUNERS) AND HP CREDITS TO INSTALL TUNING (6 ECM CREDITS, 4 TCM CREDITS). IF TCM TUNING IS PURCHASED, THE TCM MUST BE SENT IN FOR AN UNLOCK ALONG WITH THE ECM. ECM TCM TUNING AVAILABLE, TUNING WILL REQUIRE A STOCK ECM AND OR TCM SENT INTO XTREMECALIBER@OUTLOOK. COM AFTER THE UNLOCKED MODULE s ARE RECEIVED
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