On this page you'll find the exact dimensions for the GMC Sierra Regular Cab 1500 & 1500 HD generation 2, made from 1998 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	Fleetside Short Box	Fleetside Long Box
Volume (cu. ft.)	56.9	70.7
Length at floor	78.7	97.6
Inside height	19.5	19.5
Width at wheelhouse	50	50
Maximum width at floor	64.8	64.8

Wheelbase of the Sierra:

Wheelbase	Length (inch)
Sportside Box	119
Fleetside Short Box	119
Fleetside Long Box	133

Exterior dimensions of the Sierra Regular Cab:

Dimension	4x2	4x4
Overall length - Sportside Box	203.3	203.3
Overall length - Fleetside Short Box	203.3	203.3
Overall length - Fleetside Long Box	222.2	222.2
Cab length	114.2	114.2
Height - Short Box	71.2	73.8
Height - Standard Box	71	73.7

Exterior width of the Regular Cab:

Exterior width	4x2	4x4
Width (excluding mirrors)	78.5	78.5

Regular Cab miscellaneous dimensions

Miscellaneous dimensions	4x2	4x4
Front overhang - Fleetside Short Box	36.9	36.9
Front overhang - Fleetside Long Box	36.9	36.9
Rear overhang - Fleetside Short Box	47.3	47.3
Rear overhang - Fleetside Long Box	52.2	52.2
Front ground clearance - Fleetside Short Box	8	8.5
Front ground clearance - Fleetside Long Box	8	8.4
Rear ground clearance - Fleetside Short Box	8.5	8.7
Rear ground clearance - Fleetside Long Box	8.4	8.7
Ground to top of load floor - Fleetside Short Box	31.3	33
Ground to top of load floor - Fleetside Long Box	31	33
Cab length	114.2	114.2

Interior dimensions

1st row dimensions	Regular Cab
Head room	41
Shoulder room	65.2
Hip room	61.4
Leg room	41.3