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4.8L vs 5.3L

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by dgreenbluet, Dec 18, 2008.

  1. dgreenbluet

    dgreenbluet Member

    I have a 2007 sierra w/4.8L V8 and i was just wondering what are the differences between this engine and the 5.3L? Is it the same block just a small bore? or shorter stroke? just trying to figure out which parts are compatible with each other. and what parts i could maybe take off the 5.3 and slap on my 4.8 for an upgrade. any info is appreciated...thanks!
  2. 04sierracrewcab

    04sierracrewcab Epic Member 5+ Years 1000 Posts

    good question
  3. bubba33

    bubba33 Rockstar 100 Posts

    What would you want to put on your 4.8 ? that came off a 5.3 anyway. You do know that there is only like 20 hp differance between the two. See what kind of gain you would get by adding a new cold air intake. Taking something off a 5.3 to put on a 4.8 makes no sence what so ever.
  4. dgreenbluet

    dgreenbluet Member

    Maybe I would like to know if I can put some heads or a cam that comes out for the 5.3 into my 4.8. I know the difference is only 20hp which makes me think why do they even make this motor anymore? It doesnt get any better gas mileage cuz the 5.3 has the cylinder deactivation. Would headers made for the 5.3 work for the 4.8?

    And maybe if you dont have any good info about my question you should just move along.
  5. bubba33

    bubba33 Rockstar 100 Posts

    Really well I did give you some good info!!!! Look into getting a cold air intake. Here is some more info headers are the same for a 5.3 or 4.8. So back to what I told you before. I would bet you are not going to want to change a cam to get what??????? I was asking you a serious question when I respond to your post. So you move along
  6. dgreenbluet

    dgreenbluet Member

    Kinda hard to understand what your saying here, but i would assume your askn why would i want to change the cam?

    I'm really trying to find out if these engines are made from the same block?
  7. dwill3015

    dwill3015 Epic Member 5+ Years ROTM Winner 1000 Posts

    Let's be respectful here!

    Here is some info on the 4.8 and the 5.3 as far as specs go. Back in the day with early small-block engines you could upgrade the heads and such with bigger valves etc. but I'm not sure what you can swap with the newer engines and it looks like the only difference is the 5.3 has a longer stroke but same bore size as the 4.8.



    The Vortec 4800 LR4 is a Generation III small block V8 truck engine. Displacement is 4.8 L (≈293 cu in) with a 96.01 mm bore and 83 mm stroke. It is the smallest of the Generation III Vortec truck engines and was the replacement for the 5.0 L 5000 L30. The LR4 produces 270 horsepower (200 kW) to 295 horsepower (220 kW) and 285 lb·ft (386 N·m) to 305 lb·ft (414 N·m), depending on the model year and application. LR4s are manufactured at St. Catharines, Ontario and Romulus, Michigan.

    LR4 applications:

    2003-present Chevrolet Express 2500-3500/GMC Savana 2500-3500
    1999-2007 Chevrolet Silverado/GMC Sierra
    1999-2006 Chevrolet Tahoe/GMC Yukon

    The Vortec 4800 LY2 is a Generation IV small block V8 truck engine. Like its LR4 predecessor, it gets its displacement from a 96.01 mm bore and 83 mm stroke. The smallest member of the Generation IV Vortec engine family, it is unique in that it is the only member of that family that does not feature either variable valve timing or Active Fuel Management. It is rated at 295 hp (220 kW) and 305 ft·lbf (414 N·m) of torque for all applications.

    LY2 applications:

    2007-present Chevrolet Silverado 1500
    2007-present Chevrolet Tahoe
    2007-present GMC Sierra 1500
    2007-present GMC Yukon


    Generation III
    The Vortec 5300, or LM7/LM4/L59/L33, is a V8 truck engine. It is a stroked (by 9 mm) version of the Vortec 4800 and replaced the 5700 L31. L59 denoted a flexible fuel version, while the LM7 was the standard version of the engine.

    Power output is 285-295 hp (213-220 kW) and torque is 325 lb·ft (441 N·m) to 335 lb·ft (454 N·m). Displacement is 5.3 L (5328 cc (325 cu in)) from 96.01 mm bore and 92.00 mm stroke. Vortec 5300s are built in St. Catharines, Ontario, Romulus, Michigan, and Silao, Mexico.

    The LM7 Vortec 5300 was introduced in 1999, and can be considered the "garden variety" version of the Generation III 5.3 liter V8's.

    LM7 applications:

    2002-2005 Cadillac Escalade 2WD
    2002-2006 Chevrolet Avalanche
    2003-2007 Chevrolet Express/GMC Savana
    1999-2007 Chevrolet Silverado 1500
    1999-2007 GMC Sierra 1500
    1999-2006 Chevrolet Suburban/GMC Yukon XL
    1999-2006 Chevrolet Tahoe/GMC Yukon

    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:

    2004 Chevrolet TrailBlazer EXT
    2004 GMC Envoy XL
    2004 Chevrolet SSR

    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.

    L33 applications:

    2005-2007 Chevrolet Silverado 1500 4WD
    2005-2007 GMC Sierra 1500 4WD

    The L59 Vortec 5300 was introduced in 2002, and was a flexible fuel version of the LM7. Power and torque ratings matched that of the LM7.

    L59 applications:

    2002-2007 Chevrolet Silverado 1500
    2002-2006 Chevrolet Tahoe/GMC Yukon
    2002-2006 Chevrolet Suburban/GMC Yukon XL
    2002-2007 GMC Sierra 1500

    Generation IV
    First introduced in 2005, the Generation IV Vortec 5300 engines share all the improvements and refinements found in other Generation IV engines. At present, four versions of the 5300 are in production: 2 iron block versions (LY5 and LMG) and 2 aluminum block versions (LH6 and LC9). All versions feature the Active Fuel Management system.

    The LH6 with Active Fuel Management replaced the LM4 for 2005, and was the first of the Generation IV small block V8 truck engines to go into production. It is the aluminum block counterpart to the LY5.

    LH6 applications:

    2005-2007 Chevrolet TrailBlazer including EXT
    2005 GMC Envoy XL
    2005 GMC Envoy XUV
    2005-2007 Buick Rainier
    2005-present Saab 9-7X
    2007 Chevrolet Silverado 1500
    2007 GMC Sierra 1500

    Introduced in 2007, the LY5 Vortec 5300 is the replacement for the LM7 Generation III engine. For SUV applications, it is rated at 320 hp (239 kW) and 340 ft·lbf (461 N·m) of torque; for pickup truck applications, it is rated at 315 hp (235 kW) and 338 ft·lbf (458 N·m) of torque.

    LY5 applications:

    2007-present Chevrolet Avalanche
    2007-present Chevrolet Silverado 1500
    2007-present Chevrolet Suburban 1/2 ton
    2007-present Chevrolet Tahoe
    2007-present GMC Sierra 1500
    2007-present GMC Yukon
    2007-present GMC Yukon XL 1/2 ton

    The LMG Vortec 5300 is the flexible-fuel version of the LY5. Power and torque ratings for SUV and pickup truck applications are the same as each application's LY5 rating.

    LMG applications:

    2007-present Chevrolet Avalanche
    2007-present Chevrolet Silverado 1500
    2007-present Chevrolet Suburban 1/2 ton
    2007-present Chevrolet Tahoe
    2007-present GMC Sierra 1500
    2007-present GMC Yukon
    2007-present GMC Yukon XL 1/2 ton

    The LC9 Vortec 5300 is the Flex-Fuel version of the LH6, and is found in 4WD models. SUV applications are rated at 310 hp (231 kW) and 335 ft·lbf (454 N·m) of torque.

    LC9 applications:

    2007-present Chevrolet Avalanche
    2007-present Chevrolet Silverado 1500
    2007-present Chevrolet Suburban 1/2 ton
    2007-present GMC Sierra 1500
    2007-present GMC Yukon XL 1/2 ton

    The LH8 Vortec 5300 is a variant of the 5.3 L Gen IV small block V8 modified to fit in the engine bay of the GMT 345 SUV and GMT 355 trucks. It produces 300 hp (220 kW) at 5200 rpm and 320 lb·ft (434 N·m) at 4000 rpm. It has a displacement of 5328 cc (325 cu in). [22]

    LH8 applications:

    2008-present Hummer H3
    2009-present Chevrolet Colorado
    2009-present GMC Canyon
    Last edited: Dec 18, 2008
    MoBillyAla likes this.
  8. dgreenbluet

    dgreenbluet Member

    Awesome, perfectly what i was lookn for, thanks for all that info
  9. Aeropagus

    Aeropagus Rockstar Platinum Contributor 100 Posts

    Wow, that's a wealth of information, this thread should be brought back to life.
  10. silveradotrailblazer

    silveradotrailblazer Epic Member 5+ Years ROTM Winner 5000 Posts

    I'll add alittle to this, a 4.8 & 5.3 have the same block and head, the intake valves are 1.89 and exhaust are 1.55. The crankshaft is the differance. A 6.0 and a 5.3 share the same crankshaft, but the blocks are differant. The 6.0 head has 2.00 intake valves and 1.55 exhaust. You can take a 4.8 block, add the 6.0 or 5.3 crankshaft, bore the block to 99mm, add 2.00 intake valves to the head, add a GM cam part # 12560965 (LS1) and you have basiclly a castiron block LS1 engine, 350hp and 365 ft lb torque. Some people say its easier just add a 6.0 but its all what your looking for.
    MoBillyAla likes this.

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