5.3 vs 6.2

81mmcat · July 17, 2021

Is there any difference in weight between the two engines?

Sqrls · July 18, 2021

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.

WeGone · July 18, 2021

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 July 18, 2021 by WeGone

Earl Cordova · July 18, 2021

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

WeGone · July 18, 2021

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 July 18, 2021 by WeGone

Transient · July 19, 2021

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 July 19, 2021 by Transient

WeGone · July 19, 2021

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 July 19, 2021 by WeGone

WeGone · July 19, 2021

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

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

Amcguy1970 · July 19, 2021

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

WeGone · July 19, 2021

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 July 19, 2021 by WeGone

KARNUT · July 19, 2021

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.

newdude · July 19, 2021

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.