L83 vs L86: what's the difference?

Both are Gen V (LT-family) truck engines from 2014 on with direct injection, VVT and AFM. The L86 is the 6.2 L; the L83 is the 5.3 L. Same stroke, bigger bore on the 6.2:

	L83	L86
Family	Generation V	Generation V
Years	2014–2020	2014–2018
Displacement	5.3 L (325 ci)	6.2 L (376 ci)
Power	355–376 hp	420 hp
Torque	383–416 lb-ft	460 lb-ft
Bore × stroke	3.78 × 3.622 in	4.065 × 3.622 in
Compression	11.00:1	11.50:1
Block	aluminum	aluminum
AFM/DOD	yes	yes
VVT	yes	yes
Direct injection	yes	yes
VIN 8th digit	C	—

Key differences:

• Bore: L83 3.78 in, L86 4.065 in
• Compression: L83 11.00:1, L86 11.50:1

Specs are GM ratings as published; power varied by year and vehicle. Confirm any engine by the RPO code on the glovebox/console sticker.