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5.3 vs 6.2


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Can not say for sure, but they both use the same block but have different internal specs.  The GVW difference may come from the 10 speed transmission vs 8 speed transmission.

 

Not like the old day of small block and big block.

 

Link

 

 

 

Edited by WeGone
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32 minutes ago, Earl Cordova said:

Depends on what the block is made of. IIRC most 5.3's are iron and most 6.2's are aluminum.

 

Than the iron block 5.3 would be heaver.

 

Here is a list of what blocks were and the designated RPO.

 

https://en.wikipedia.org/wiki/General_Motors_LS-based_small-block_engine

Edited by WeGone
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Difference is about 100 lbs.  Going off vehicle tow ratings.  5.3 w/ 10-speed is rated for 100 lbs more towing than a 6.2 w/ 10-speed.  Otherwise, engine architecture is pretty much the same.

Edited by Transient
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Maybe its the way the truck is configured? I just don't see it. In any event 100 lbs. is nothing.

 

 

 

 

 

 

 

Crew Cab with Short Bed Double Cab with Standard Bed Regular Cab with Long Bed
2.4L Turbo 9,300 lb (2WD) 9,300 lb (2WD) N/A
4.3L V6 7,600 lb (2WD) 7,600 lb (2WD) 7,900 lb (2WD)
5.3L V8 11,500 lb (2WD) 11,500 lb (2WD) 10,000 lb (2WD)
6.2L V8 11,900 lb (4WD) 13,300 lb (4WD) N/A
3.0L Turbo-Diesel 9,500 lb (2WD) 9,500 lb (2WD) N/A
Edited by WeGone
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RPO Code

Engine

2020 Silverado (lbs / kg)

2021 Silverado (lbs / kg)

Difference (2021 vs 2020)

LV3

4.3L V6

7,900 / 3,583

7,900 / 3,493

0

L3B

2.7L I4 Turbo

7,000 / 3,175

9,600 / 4,354

+2,600 / +1,179

L82

5.3L V8 AFM

10,000 / 4,536

10,000 / 4,536

0

L84

5.3L V8 DFM

11,600 / 5,216

11,500 / 5,262

-100 / -45

LM2

3.0L I6 Turbo-Diesel

9,300 / 4,218

9,500 / 4,309

+200 / +91

L87

6.2L V8 DFM

13,400 / 6,033

13,300 / 6,078

-100 / -45

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20 hours ago, Earl Cordova said:

Depends on what the block is made of. IIRC most 5.3's are iron and most 6.2's are aluminum.

I believe that is the other way around, I think most 5.3's are aluminum. I don't hear of many iron block 5.3's especially of the later models. 4.8's and 6.0's I have heard are mostly iron. I could be wrong though, maybe someone has some production numbers. 

 

Tyler

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Gen. IV LS Engine Upgrade Guides & Specs (2005-Present)

Gen IV LS & Vortech Engines
Displacement Engine Code LS Engine Upgrade Guide LS Engine Spec Guide Reluctor VIN (8th Digit) Block Head Gen IV Years Vehicle
4.8L L20 L20 Upgrade Guide L20 Engine Specs 58X A Iron Cathedral 2010-17 Truck/Van
4.8L LY2 LY2 Upgrade Guide LY2 Engine Specs 58X C Iron Cathedral 2007-09 Truck
5.3L LY5 LY5 Upgrade Guide LY5 Engine Specs 58X J Iron Cathedral 2007-09 Truck/SUV
5.3L LC9 LC9 Upgrade Guide LC9 Engine Specs 58X 3 or 7 Alum. Cathedral 2007-14 Truck/SUV
5.3L LH6 LH6 Upgrade Guide LH6 Engine Specs 24X/58X M Alum. Cathedral 2005-09 SUV
5.3L LH8 LH8 Upgrade Guide LH8 Engine Specs 58X L Alum. Cathedral 2008-09 Truck/SUV
5.3L LH9 LH9 Upgrade Guide LH9 Engine Specs 58X P Alum. Cathedral 2010-12 Truck
5.3L LMF LMF Upgrade Guide LMF Engine Specs 58X 4 Iron Cathedral 2010-14 Vans
5.3L LMG LMG Upgrade Guide LMG Engine Specs 58X 0 Iron Cathedral 2007-14 Truck/SUV
5.3L LS4 LS4 Upgrade Guide LS4 Engine Specs 24X/58X C Alum. Cathedral 2005-09 FWD car
6.0L LS2 (Car) LS2 (Car) Upgrade Guide LS2 (Car) Engine Specs 24X/58X U Alum. Cathedral 2005-2007 Corvette/GTO/CTS-V
6.0L LS2 (Truck) LS2 (Truck) Upgrade Guide LS2 (Truck) Engine Specs 24X/58X H Alum. Cathedral 2005-06, 2007-09 SSR/TBSS, TBSS/9-7X Aero
6.0L L76 (Car) L76 (Car) Upgrade Guide L76 (Car) Engine Specs 58X Y Alum. Rectangle 2008-10 Pontiac G8
6.0L L76 (Truck) L76 (Truck) Upgrade Guide L76 (Truck) Engine Specs 58X Y Alum. Rectangle 2007-09 Truck/SUV
6.0L L77 L77 Upgrade Guide L77 Engine Specs 58X 2 Alum. Rectangle 2011-17 Caprice PPV, Holden VE2/VF
6.0L L96 L96 Upgrade Guide L96 Engine Specs 58X G Iron Rectangle 2010-17 Truck/SUV/Van
6.0L L98 L98 Upgrade Guide L98 Engine Specs 58X N/A Alum. Rectangle 2007-08 Holden
6.0L LC8 LC8 Upgrade Guide LC8 Engine Specs 58X B Iron Rectangle 2011-16 CNG fuel
6.0L LFA LFA Upgrade Guide LFA Engine Specs 58X 5 Alum. Cathedral 2008-09 Hybrid Truck/SUV
6.0L LY6 LY6 Upgrade Guide LY6 Engine Specs 58X K/N Iron Rectangle 2007-14 Truck/SUV/Van
6.0L LZ1 LZ1 Upgrade Guide LZ1 Engine Specs 58X J Alum. Cathedral 2010-13 Hybrid/Truck/SUV
6.2L L92 L92 Upgrade Guide L92 Engine Specs 58X 8 Alum. Rectangle 2007-08 SUV
6.2L L94 L94 Upgrade Guide L94 Engine Specs 58X F Alum. Rectangle 2010-14 SUV
6.2L L99 L99 Upgrade Guide L99 Engine Specs 58X J Alum. Rectangle 2010-15 Camaro (auto)
6.2L L9H L9H Upgrade Guide L9H Engine Specs 58X 2 Alum. Rectangle 2009-14 Truck/SUV
6.2L LS3 LS3 Upgrade Guide LS3 Engine Specs 58X W Alum. Rectangle 2008-17 Performance Cars, C6 Grand Sport
6.2L LSA LSA Upgrade Guide LSA Engine Specs 58X P Alum. Rectangle 2008-15 CTS-V, 5th Gen ZL-1
6.2L LS9 LS9 Upgrade Guide LS9 Engine Specs 58X T Alum. Rectangle 2009-13 Corvette ZR-1
7.0L LS7 LS7 Upgrade Guide LS7 Engine Specs 58X E  
Edited by WeGone
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If memory serves. Around 2006 the transformation started. The performance engines were aluminum. Originally they went into 4WDS for weight reasons. After 2014 they all were aluminum in 1/2 tons. 

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Lots going on here, with info all over the place.  

 

Here are the shipping weights for both the 5.3 and the 6.2 long blocks.  

 

5.3 - 462.97lbs

6.2 - 560lbs

 

On 7/18/2021 at 10:02 AM, Sqrls said:

Yes. I believe the 6.2 is about 150lbs heavier, but that is probably not the correct number. I do know for a fact that the 6.2 and 3.0 Diesel engined trucks sit lower in the front due to the extra weight.

 

The 5.3 and the 6.2 use the same exact motor mounts and mounting locations.  The 6.2 doesn't sit lower than the 5.3.  And, all of the 10 speeds for gas and the diesel use the same exact transmission mount, so the 3.0 probably doesn't sit that much lower.   

 

21 hours ago, Earl Cordova said:

Depends on what the block is made of. IIRC most 5.3's are iron and most 6.2's are aluminum.

 

There has been no iron block 5.3 as of 2014.  All aluminum.  

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