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**Clyde65** · 12-17-2009, 06:51 PM

LM4

The LM4 was an aluminum block version of the LM7, and had a short production life. It should not be confused with the L33.

LM4 applications:

* 2003-04 Chevrolet TrailBlazer EXT
* 2004 GMC Envoy XL
* 2004 Chevrolet SSR

L33 Vin code "B"

The L33 was an aluminum block version of the LM7, and was referred to as the Vortec 5300 HO in marketing materials. Power increased by 15 hp (11 kW), to 310 hp (230 kW), over the LM7, and torque was unchanged. It was only available on extended cab 4WD pickup trucks. Only 25% of trucks made in 2005 had the L33 engine.

325ftLbs torque per....

http://en.wikipedia.org/wiki/GM_Vortec_engine

Clyde65

12-17-2009, 06:51 PM	#6
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,540	Re: Torque specs for a L33 5.3 vortec LM4 The LM4 was an aluminum block version of the LM7, and had a short production life. It should not be confused with the L33. LM4 applications: * 2003-04 Chevrolet TrailBlazer EXT * 2004 GMC Envoy XL * 2004 Chevrolet SSR L33 Vin code "B" The L33 was an aluminum block version of the LM7, and was referred to as the Vortec 5300 HO in marketing materials. Power increased by 15 hp (11 kW), to 310 hp (230 kW), over the LM7, and torque was unchanged. It was only available on extended cab 4WD pickup trucks. Only 25% of trucks made in 2005 had the L33 engine. 325ftLbs torque per.... http://en.wikipedia.org/wiki/GM_Vortec_engine Clyde65 __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!* Last edited by Clyde65; 12-17-2009 at 06:52 PM.