Cadillac STS Specs — Dimensions & Weight by Generation

Quick answer

The 2011 Cadillac STS, the latest model year on record, is 196.5″ long, 72.4″ wide and 57.5″ tall on a 116.1″ wheelbase, and weighs 4,050 lb. At 16.4 ft it fits a standard garage and leaves 1.6 ft spare in an 18-foot street space.

Every Cadillac STS generation, measured

FIG.01·Cadillac STS dimensions by generation
Generation	Length	Width	Height	Wheelbase	Curb weight
2005–2011	196.5″	72.4″	57.5″	116.1″	3,858 lb

ROWS 1·SOURCE NHTSA vPIC / Transport Canada

STS year by year

FIG.02·Cadillac STS dimensions by model year
Model year	Length	Width	Wheelbase	Curb weight	Body styles
2011	196.5″	72.4″	116.1″	4,050 lb	2
2010	196.5″	72.4″	116.1″	4,045 lb	2
2009	197.2″	72.4″	116.5″	4,076 lb	2
2008	197.2″	72.4″	116.5″	4,076 lb	2
2007	197.2″	72.4″	116.5″	4,076 lb	2
2006	197.2″	72.4″	116.5″	4,076 lb	2
2005	196.5″	72.4″	116.1″	3,858 lb	1

ROWS 7·SOURCE Transport Canada vehicle specifications

STS on the used market

In 89 STS listings we have collected since June 2026, the 2005–2011 car is the most common: 84 of them (94%), at an average asking price of $4,813.

FIG.05·Cadillac STS generations on the used market
Generation	Listings	Share	Average asking price	Average mileage
2005–2011	84	94%	$4,813	112,565 mi
Other years	5	6%	$7,370	65,620 mi

ROWS 2·SOURCE ForCar, US used-car listings collected since June 2026

Will a STS fit

FIG.02·Cadillac STS — will it fit
Space	Typical size	This car	Verdict
Single garage	20 ft deep	16.4 ft	Fits, with room to open the door
Street parking space	18 ft	16.4 ft	Fits comfortably
Standard parking bay width	8.5 ft wide	6 ft	Room to open doors both sides

ROWS 3·SOURCE ForCar, computed from vehicle dimensions

Against cars of the same length

FIG.03·Cadillac STS against similar-sized cars
Measure	This car	Typical of 875 cars within 10″ of its length	Difference
Width	72.4″	74″	−1.6″
Wheelbase	116.1″	113″	+3.1″
Curb weight	4,050 lb	4,101 lb	−51 lb

ROWS 3·SOURCE ForCar, computed across vehicles of similar length

STS against its rivals

Next to the Infiniti G25, Saturn Aura and Pontiac Grand Prix, the STS is the heaviest and the widest of the four.

FIG.04·Cadillac STS against its rivals
Model	Model year	Length	Width	Curb weight
Cadillac STS (this car)	2011	196.5″	72.4″	4,050 lb
Infiniti G25	2012	187″	69.7″	3,680 lb
Saturn Aura	2009	190.9″	70.5″	3,589 lb
Pontiac Grand Prix	2009	198.4″	71.7″	3,538 lb

ROWS 4·SOURCE NHTSA vPIC / Transport Canada; rivals: same EPA class and body, most searched

Upgrade to Pro

Specs vary by trim. Yours decodes from the VIN.

Exact build, engine and factory options for one VIN
The original window sticker as it left the factory
What that specific configuration is worth today
Decode a whole list of VINs at once
No ads, on every page
No ads, no tracking — and much more

See plans → Start free →

Free plan available — no credit card needed

Everything on the Cadillac STS

Recalls14 campaigns Fuel economy21 mpg best Reliability3.5/5 Common problems371 complaints Check a VINAgainst this exact build Cargo space14 cu ft Used prices137 listings What yours is worthValue by year & mileage Insurance costEstimated per year Window stickerOriginal Monroney label Decode a VINWhat each character means About this car2005–2011

Frequently asked questions

Is the 2011 STS bigger than the 2010?

No. The 2011 and 2010 STS are the same size, within half an inch and 5 lb of each other.

Which is bigger, the STS or the Infiniti G25?

The 2012 Infiniti G25 is 9.5″ shorter and 370 lb lighter than the 2011 STS.

Dimensions from NHTSA vPIC and Transport Canada vehicle records, manufacturer-declared for 7 STS model years, 2005 to 2011. Metric values converted to inches and pounds; generation boundaries are estimated from changes in size (how we measure). Last updated Nov 2026. — ForCar Reviewed by Denis Kataev, founder of ForCar.

Found this useful?

Mark ForCar as a preferred source and our data shows up first in your Google results. One click, no account.

Prefer ForCar →