2006 5.3l?

[ColoradoSkiCountry]

Anyone know off the top of their head how much HP the 2006 5.3L offered in the 1500 Silverado/Sierra?

 

Thanks

[jro909]

315ish, my 04 is 295...99-02s were like 275...it also i think depends on exactley what 5.3 it is...

[00Silverado4x4]

I am new to this forum but what I do know in regards to the 2006 is dependent on your model engine. It will be either 295hp or 315hp. I have the L59 cast iron block (flex fuel) which is 295hp.

[dlstewart01]

In 2006, the cast iron block is 295 HP and 335 torque. The aluminum block is 310 HP and 335 torque. In 2006 I believe the aluminum block was only available in the extended cab Z71 4X4. I know thats the only way to get the aluminum block in 2005. I am too lazy to look up the 2006, but I don't believe anything changed.

[RaddHazzard]

i own a 2006 z71 extended cab and have the aluminum block. The window sticker indeed says 315 hp.

[dlstewart01]

i own a 2006 z71 extended cab and have the aluminum block. The window sticker indeed says 315 hp.

 

The GM factory brochure for 2006 says...310@ 5200 RPM.. Maybe its a misprint I didn't want to go out to the garage and look in the dealer book but I guess I can...

 

This is from the dealer RPO code book...

 

 

From Wikipedia, but what do they know...

 

L33

The L33 (VIN code "B") is 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.

 

L33 applications:

 

2005-2007 Chevrolet Silverado 1500 4WD

2005-2007 GMC Sierra 1500 4WD

 

 

 

 

FULL DESCRIPTIONS OF NEW OR CHANGED FEATURES

 

RPO L33 FOR CHEVROLET SILVERADO AND GMC SIERRA

The Gen III Vortec 5300 is available in a new lighter, higher output variant optional on some 2005 Silverados and Sierras. RPO L33 will be introduced in short bed, extended cab versions of these pickups. The L33 features an aluminum engine block, new cylinder heads and a high-lift cam. Torque will increase, and horsepower is expected to exceed 300 in final production trim.

 

One of the L33s distinguishing features is its engine block. As with the 2004 LM4 Vortec 5300, the L33s foundation is a cast-aluminum block with pressed-in iron cylinder liners, similar to the block used for GM Powertrains LS1 and LS6 car V-8s. The L33 block is exceptionally light; as a result, a fully dressed L33 is 100 pounds lighter than cast iron-block Vortec 5300s (RPOs LM7 and L59).

 

The L33 takes its cylinder heads from the LS6. Originally developed for the Z06 Corvette, these heads improve airflow in and out of the engine. With their pent-roof combustion chambers and new flat top pistons (the pistons in other Gen III Vortec 5300s have a slight sump in the piston deck), the L33s compression ratio increases from 9.5:1 to 9.9:1. This increase improves the engines volumetric efficiency yet still allows it to achieve full power with regular grade gasoline.

 

Finally, the L33 is equipped with a higher-lift camshaft. Maximum valve lift increases from 11.6 mm on the LM7 and L59 to 12.5 mm. The new cam and compression ratio are the primary sources of the L33s increased horsepower.

 

The L33 camshaft and cylinder heads were developed in conjunction with the new Gen IV Vortec 5300 (RPO LH6). The design objective was more horsepower for customers who need it, without requiring a step up to the Vortec 6000 (and an increase in operational costs). RPO L33 expands GM Powertrains lineup of Vortec V8s and gives GMs truck customers even more flexibility and choice.

 

The L33 Vortec 5300 will be built at Powertrains Romulus, Mich., engine plant. With its introduction, Powertrain will cease production of Vortec 5300 RPO LM4. The Buick Rainier, Chevrolet Trailblazer EXT and GMC Envoy XL, previously equipped with the LM4, will now be powered by the Gen IV Vortec 5300 with Displacement on Demand. The 2005 Chevrolet SSR will be powered by the new LS2 truck V-8.

[KMGZ400]

wait not to hijack but can someone tell me exactly how much a 2004 4.8 has?

[dlstewart01]

The 2004 factory brochure says... the 4.8 has 285 HP @ 5600 RPM and 295 torque @ 4000 RPM..

[ColoradoSkiCountry]

thanks for all the info

[RaddHazzard]

i own a 2006 z71 extended cab and have the aluminum block. The window sticker indeed says 315 hp.

 

The GM factory brochure for 2006 says...310@ 5200 RPM.. Maybe its a misprint I didn't want to go out to the garage and look in the dealer book but I guess I can....

 

 

 

I could be wrong as my window sticker is kinda beat up and where it says 315 it could say 310 because the last digit is on a fold in the paper and is very hard to read.

[uchi]

some good info right there. ive got an 06 slt crew cab so would i assume ive got the 295 hp version? is there a code somewhere i can check to see what motor is in mine? or a code on the motor itself thats easy to find?

[mxdirtrider56]

some good info right there. ive got an 06 slt crew cab so would i assume ive got the 295 hp version? is there a code somewhere i can check to see what motor is in mine? or a code on the motor itself thats easy to find?

 

www.compnine.com You can enter your VIN number and it will tell you everything you want to know about your truck.

[Itsme7]

If you have the L33 engine it will be shown as a "B" on the 8th digit of the vin. When i was looking for specs in my owners manual on my engine (spark plugs gaps, oil capacity, ect) i couldnt find anything because the "B" engine code. But now that i found this thread its cleared that up. Thanks for the info Don!

[502ci]

I could be wrong as my window sticker is kinda beat up and where it says 315 it could say 310 because the last digit is on a fold in the paper and is very hard to read.

My 2006 5.3 extended cab Z71 window sticker says 315hp.

[kawtoy_77]

I have the LMG Flex-Fuel 5.3L in an '07 GMT900; I always believed it to be 315hp. How do i know for sure?