The Alternator output is controlled by the Powertrain Control Module (PCM). No adjustment is possible.
Removal & Installation
The voltage regulator is part of the Alternator and is not serviceable as a separate component.
Escalade, Suburban 1500 & 2500, Tahoe, Yukon, Yukon XL 1500 & 2500 (2006-2007), Yukon Denali and Yukon Denali XL (2005-2006)