On this page, you will find the general dimensions of the GMC Sierra 1500 generation 5 (2019-present), including cargo box dimensions. This page won't display all dimensions. If you are looking for the exact dimensions of a specific cab style, please select one below. First, let's make sure we have the right truck in front of you:

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Dimensions in tables

Sierra truck bed dimensions

Bodystyle	Crew Cab Standard Bed (6'6")	Crew Cab Long Bed (8')	Double Cab Standard Bed (6'6")	Regular Cab Long Bed (8')
Volume (cu. ft.)	71.7	89.1	71.7	89.1
Length at floor	79.44	98.18	79.44	98.18
Inside height	22.4	22.4	22.4	22.4
Width at wheelhouse	50.63	50.63	50.63	50.63
Maximum width at floor	71.4	71.4	71.4	71.4

Wheelbase of the Sierra:

Bodystyle	Length (inch)
Crew Cab - Short Bed (5'8")	147.4
Crew Cab - Standard Bed (6'6")	157
Double Cab - Standard Bed (6'6")	147.4
Regular Cab - Long Bed (8')	139.5

This model comes in 3 body styles

There are 3 bodystyles for this Sierra 1500 in our database. For exact dimensions, please click on one below:

• Crew Cab
• Double Cab
• Regular Cab

Most truck models come in different body styles. The Sierra 5 1500 comes in 3 body styles. Typically the dimensions of different bodystyles differ slightly. The dimensions will greatly overlap, so this page will be helpful to get a general sense of sizing. You can click through to more detailed dimension pages per cab style.

Body styles generally have different cab styles, with the most common ones being the regular cab (two-door), extended cab (more space behind seats), and crew cab (four-door). Manufacturers also offer different trim types, although these will generally not affect dimensions so we don't always list them here.

GMC Sierra Crew Cab

Check the dimensions of the Crew Cab

GMC Sierra Double Cab

Check the dimensions of the Double Cab

GMC Sierra Regular Cab

Check the dimensions of the Regular Cab