Should be able to.
The optional 220A alternator is:
KW5 Alternator, 220 amps
Some on lots 'here' have that option added.
And factory dual alternators is:
KHB Alternators, dual, 150 amps and 220 amps each
They gotta have parts available for service and/or crash usage.
(duals are only available with the duramax)
2018 L5P Sierra 4x4 SB Denali
Sold 2011 LML Sierra 4x4 CCSB SLT
Sold 2010 LMM Sierra 4x4 CCSB SLT
Sold 2004.5 LLY Sierra 4x4 ECLB SLE
Last edited by redwngr; 04-09-2017 at 10:18 PM.