If you are not sure if these are the right parts for your truck, please email me your VIN (Vehicle Identification Number) and I will check fitment for you.
OEM Cross GM 12499225 Hydraulic Roller Lifters & Aftermarket Guide Trays
LS1, LS2, LS3, LS7 - (4.8L, 5.3L, 5.7L, 6.0L, 6.2L)
Replaces OE Part Number:
12499225,17120735, 17122490, 17089852, 17108057, 17120070
17121905,HL124, 10530-16, 91113, HT-2148, 12595365, 5234890
5235498, 5233745, 5234670,JB2079, HL123,JB2270,HL112 ,HL118,HL119, L2148
Features included:
OEM GM# 12499225
Large Base Design
Durable in High Performance Applications
16 x OEM Hydraulic Roller Lifters
4 x Guide Trays (Not OEM)

Note: These are not designed to replace DOD/AFM lifters unless customer is looking to remove DOD/AFM from the engine.
Applications:
LS1, LS2, LS3, LS6, LS7, LS9 LSX Engines
1999-2002 Camaro & Firebird
2010-2013 Camaro
1999-2013 Corvette
2004-2006 Pontiac GTO
2004-2007 Cadillac CTS-V
2008-2009 Pontiac G8
2000-2013 Tahoe, Yukon, Escalade
2003-2009 H2 Hummer
2001-2013 Chevrolet Avlanche
1999-2013 Silverado & Sierra (4.8L, 5.3L, 6.0L)