HP Tuners T87A Unlock Service Engine_8_1L_V8 This unlock service will allow

This unlock service will allow you to use HP Tuners Software to modify the ECM with their tuning suite

injectors can develop buildup that affects spray pattern

6L Diesel 2009 GMC Yukon 4

and our signature GT on the left

The manual procedure requires no tools except a battery charger or jumper cables from another vehicle

HP Tuners T87A Unlock Service Engine_8_1L_V8 This unlock service will allowPLEASE READ ENTIRE DESCRIPTION TO UNDERSTAND ALL OPTIONS This is a service for you to send your T87A controller to us to be unlocked. After unlocked your transmission controller will be able to be tuned with HP Tuners. THIS DOES NOT INCLUDE THE CONTROLLER ITSELF. If you want us to supply you with a TCM you want this service here: T87A Programmed and Unlocked for HP Tuners This service option will upgrade your T87A TCM to enable tuning. Send us your