SBC3

This Model is part of the Small Block Chevy V8 Family of Engines.

This page is intended to aid in the understanding of the entire Gen III Lineup of engines, and as a guide when attempting to find one in a junkyard.

It outlines all of the engines in Chevy's generation 3, both by displacement and year by year. It aims to aid in finding an engine from a junkyard, identifying specific engine models, or teaching the history of Gen 3. For more details about engines, see that engines specific page.

Components

• Powertrain Control Modules (PCMs)
• Cam Shafts
• Cylinder Heads
• Transmissions
• Oil Filters
• Starters
• Spark Plugs
• Coils
• Fuel Injectors
• Flex Fuel
• Intake Manifolds and Throttle Bodies

By Displacement

The Gen III Lineup consists of nine total engine models, four of which feature an aluminum block (the rest being cast iron).

4.8L (293ci)

LR4 "Vortec 4800"
Iron Block
1999-2007 - Vin V
'99-'07 Silverado 1500 '00-'06 Tahoe '03-'07 Express 2500/3500

5.3L (325ci)

LM7 "Vortec 5300"	L59 "Vortec 5300 (Flex Fuel)"	LM4 "Vortec 5300"	L33 "Vortec 5300 HO"
Iron Block	Iron Block	Aluminum Block	Aluminum Block
1999-2007 - Vin T	2002-2007 - Vin Z	2003-2005 - Vin P	2005-2007 - Vin B
99-'07_Silverado_1500 '99-'00 Silverado 2500 '00-'06 Suburban 1500 '00-'06 Tahoe '03-'07 Express 1500/2500 '02-'06 Avalanche 1500 '02-'05 Escalade 2WD	'02-'07 Silverado 1500 '02-'06 Suburban 1500 '02-'06 Tahoe '05-'06 Avalanche 1500	'03-'05 Trailblazer EXT '03-'04 SSR '04-'04 GMC Envoy XL/XUV '04-'04 Buick Rainier '03-'04 Isuzu Ascender	'05-'07 Silverado 1500 4WD

5.7L (346ci)

LS1	LS6
Aluminum Block	Aluminum Block
1997-2005 - Vin G	2002-2007 - Vin S
'97-'04 Corvette '98-'02 Firebird '98-'02 Camaro Z28/SS '04-'04 GTO	'01-'04 Corvette Z06 '04-'05 Cadillac CTS-V

6.0L (364ci)

LQ4 "Vortec 6000"	LQ9 - "Vortec HO 6000/VortecMAX"
Iron Block	Iron Block
1999-2007 - Vin U	2002-2007 - Vin N
'99-'07 Silverado 1500HD-3500 '00-'06 Suburban 1500LTZ/2500 '02-'07 Hummer H2 '03-'07 Express 2500/3500 '03-'08 W-Series	'02-'06 Escalade AWD/EXT '03-'06 Escalade ESV '05-'06 Escalade 2WD '03-'07 Silverado SS/HO/VortecMAX '05-'06 Sierra Denali

By Model Year

* Denotes New Addition

1997

Aluminum Block

*LS1
5.7L (346ci)
Corvette

1998

Aluminum Block

LS1
5.7L (346ci)
Corvette Camaro Firebird

1999

Aluminum Block

LS1
5.7L (346ci)
Corvette Camaro Firebird

Iron Block

*LR4	*LM7	*LQ4
4.8L (293ci)	5.3L (325ci)	6.0L (364ci)
Silverado 1500/2500	Silverado 1500/2500	Silverado HD

2000

Aluminum Block

LS1
5.7L (346ci)
Corvette Camaro Firebird

Iron Block

LR4	LM7	LQ4
4.8L (293ci)	5.3L (325ci)	6.0L (364ci)
Silverado 1500/2500 *Tahoe	Silverado 1500/2500 *Suburban 1500 *Tahoe	Silverado HD *Suburban 1500LTZ/2500

2001

Aluminum Block

LS1	*LS6
5.7L (346ci)	5.7L (346ci)
Corvette Camaro Firebird	Corvette Z06

Iron Block

LR4	LM7	LQ4
4.8L (293ci)	5.3L (325ci)	6.0L (364ci)
Silverado 1500 Tahoe	Silverado 1500/2500 Suburban 1500 Tahoe	Silverado *2500/HD Suburban 1500LTZ/2500

2002

Aluminum Block

LS1	*LS6
5.7L (346ci)	5.7L (346ci)
Corvette Camaro Firebird	Corvette Z06

Iron Block

LR4	LM7	*L59	LQ4	*LQ9
4.8L (293ci)	5.3L (325ci)	5.3L (325ci)	6.0L (364ci)	6.0L (364ci)
Silverado 1500 Tahoe	Silverado 1500/2500 Suburban 1500 Tahoe	Silverado 1500 Suburban 1500 Tahoe	Silverado *2500/HD Suburban 1500LTZ/2500	Escalade AWD/EXT

2003

Aluminum Block 5.3 LM4 introduced for Trailblazer EXT and Chevrolet SSR, Silverado SS introduced with LQ9, Express gets LR4, LM7, and LQ4.

Aluminum Block

*LM4	LS1	LS6
5.3L (325ci)	5.7L (346ci)	5.7L (346ci)
Trailblazer EXT Chevrolet SSR Isuzu Ascender	Corvette Camaro Firebird	Corvette Z06

Iron Block

LR4	LM7	L59	LQ4	*LQ9
4.8L (293ci)	5.3L (325ci)	5.3L (325ci)	6.0L (364ci)	6.0L (364ci)
Silverado 1500 Tahoe *Express 2500/3500	Silverado 1500/2500 Suburban 1500 Tahoe *Express 1500/2500	Silverado 1500 Suburban 1500 Tahoe	Silverado *2500/HD Suburban 1500LTZ/2500 *Hummer H2 *Express 2500/3500 *W-Series	Escalade AWD/EXT *Silverado SS/HO

2004

GMC Envoy XL/XUV and Buick Rainier get LM4, Pontiac GTO Gets LS1, Cadillac CTS-V Gets LS6

Aluminum Block

LM4	LS1	LS6
5.3L (325ci)	5.7L (346ci)	5.7L (346ci)
Trailblazer EXT Chevrolet SSR Isuzu Ascender *GMC Envoy XL/XUV *Buick Rainier	Corvette Camaro Firebird *GTO	Corvette Z06 *Cadillac CTS-V

Iron Block

LR4	LM7	L59	LQ4	LQ9
4.8L (293ci)	5.3L (325ci)	5.3L (325ci)	6.0L (364ci)	6.0L (364ci)
Silverado 1500 Tahoe Express 2500/3500	Silverado 1500/2500 Suburban 1500 Tahoe Express 1500/2500	Silverado 1500 Suburban 1500 Tahoe	Silverado 2500/HD Suburban 1500LTZ/2500 Hummer H2 Express 2500/3500 W-Series	Escalade AWD/EXT Silverado SS/HO

2005

Gen4 Debuts, Replaces LS1 and LM4 (Trailblazer EXT gets one more year of LM4). L33 Releases as the only Aluminum Truck Engine. Avalanche gets Flex Fuel. Sierra Denali gets LQ9

Aluminum Block

LM4	*L33	LS1	LS6
5.3L (325ci)	5.3L (325ci)	5.7L (346ci)	5.7L (346ci)
Trailblazer EXT	Silverado 1500 4WD	Replaced By LS2	Cadillac CTS-V

Iron Block

LR4	LM7	L59	LQ4	LQ9
4.8L (293ci)	5.3L (325ci)	5.3L (325ci)	6.0L (364ci)	6.0L (364ci)
Silverado 1500 Tahoe Express 2500/3500	Silverado 1500/2500 Suburban 1500 Tahoe Express 1500/2500	Silverado 1500 Suburban 1500 Tahoe *Avalanche 1500	Silverado 2500/HD Suburban 1500LTZ/2500 Hummer H2 Express 2500/3500 W-Series	Escalade AWD/EXT Silverado SS/HO *Sierra Denali

2006

LS7 Replaces LS6, Silverado VortecMAX introduced. Escalade 2WD drops LM7.

Aluminum Block

LM4	L33	LS6
5.3L (325ci)	5.3L (325ci)	5.7L (346ci)
Replaced by LH6	Silverado 1500 4WD	Replaced by LS7

Iron Block

LR4	LM7	L59	LQ4	LQ9
4.8L (293ci)	5.3L (325ci)	5.3L (325ci)	6.0L (364ci)	6.0L (364ci)
Silverado 1500 Tahoe Express 2500/3500	Silverado 1500/2500 Suburban 1500 Tahoe Express 1500/2500	Silverado 1500 Suburban 1500 Tahoe *Avalanche 1500	Silverado 2500/HD Suburban 1500LTZ/2500 Hummer H2 Express 2500/3500 W-Series	Escalade AWD/EXT Silverado VortecMAX Sierra Denali

2007

Tahoe, Suburban, and Avalanche switch to Gen 4.

Aluminum Block

L33
5.3L (325ci)
Silverado 1500 4WD

Iron Block

LR4	LM7	L59	LQ4	LQ9
4.8L (293ci)	5.3L (325ci)	5.3L (325ci)	6.0L (364ci)	6.0L (364ci)
Silverado 1500 Express 2500/3500	Silverado 1500/2500 Express 1500/2500	Silverado 1500	Silverado 2500/HD Suburban 1500LTZ/2500 Hummer H2 Express 2500/3500 W-Series	Escalade AWD/EXT Silverado VortecMAX Sierra Denali

2008

All Gen 3 Blocks cease production. Remaining stock is used up in W-Series.

Aluminum Block

L33
5.3L (325ci)
Replaced by LC9

Iron Block

LR4	LM7	L59	LQ4	LQ9
4.8L (293ci)	5.3L (325ci)	5.3L (325ci)	6.0L (364ci)	6.0L (364ci)
Replaced by LY2	Replaced by LY5	Replaced by LMG	W-Series	Replaced by L92

2009

All Gen 3 stock depleted.

Iron Block

LQ4
6.0L (364ci)
Replaced by LY6

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