On this page you'll find the exact dimensions for the GMC Sierra Regular Cab 1500 generation 4, made from 2014 to . Below we'll list the dimensions for this pickup from verified sources. First, let's make sure you have the right dimensions in front of you:

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Dimensions in tables

Sierra truck bed dimensions (Regular Cab)

Truck bed dimensions	Standard Box (6'6")	Long Box (8')
Volume (cu. ft.)	61	76.3
Length at floor	78.9	97.8
Inside height	21.1	21.1
Width at wheelhouse	51	51
Maximum width at floor	64.6	64.6

Wheelbase of the Sierra:

Wheelbase	Length (inch)
Standard Box (6'6")	119
Long Box (8')	133

Exterior dimensions of the Sierra Regular Cab:

Dimension	4x2	4x4
Overall length - Standard Box (6'6")	205.6	205.6
Overall length - Long Box (8')	224.4	224.4
Height - Standard Box (6'6")	74	74.1
Height - Long Box (8')	73.5	73.8

Exterior width of the Regular Cab:

Exterior width	4x2	4x4
Overall width - Standard Box (6'6")	80	80
Overall width - Long Box (8')	80	80

Regular Cab miscellaneous dimensions

Miscellaneous dimensions	4x2	4x4
Min. ground clearance - Standard Box (6'6")	8.2	8.6
Min. ground clearance - Long Box (8')	8.3	8.8
Ground to top of load floor - Standard Box (6'6")	36.3	36.2
Ground to top of load floor - Long Box (8')	35.9	35.6

Interior dimensions

1st row dimensions	Regular Cab
Head room	42.4
Shoulder room	66
Hip room	60.7
Leg room	45.3

Turning circle of the Sierra:

Turning circle:	Kerb-to-kerb	Wall-to-wall
Standard Box (6'6")	40
Long Box (8')	44