THE SPECS GUIDE

2021 Cadillac CT4

Find your trim. See what changes.

Compare recorded engines, drivetrains and specifications, then open the VIN pattern that matches your car.

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Use its full VIN to look up the vehicle and check the recorded specifications.

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Choose up to three VIN patterns. Each column describes one recorded pattern.

Vehicle 1 Vehicle 2 Vehicle 3

Swipe the table sideways to compare vehicles. Specification names stay visible.

Specification	Premium Luxury · AWD 1G6DF5RK-M	Luxury · RWD 1G6DJ5RK-M	Sport · AWD 1G6DG5RK-M	Luxury · AWD 1G6DK5RK-M	Premium Luxury · AWD 1G6DF5RL-M	Premium Luxury Special Edition · RWD 1G6D45RK-M	Luxury · RWD 1G6DJ5RK-9	Premium Luxury Special Edition · RWD 1G6D45RL-M	Luxury · AWD 1G6DE5RK-M	Premium Luxury Special Edition · AWD 1G6D55RL-M	Premium Luxury · RWD 1G6DB5RL-M	Luxury · RWD 1G6DA5RK-M	Premium Luxury Special Edition · AWD 1G6D55RK-M	V-Series · RWD 1G6DD5RL-M	V-Series · AWD 1G6DH5RL-M	Sport · RWD 1G6DC5RK-M
Engine	2L 4-cyl	2L 4-cyl	2L 4-cyl	2L 4-cyl	2.7L 4-cyl	2L 4-cyl	2L 4-cyl	2.7L 4-cyl	2L 4-cyl	2.7L 4-cyl	2.7L 4-cyl	2L 4-cyl	2L 4-cyl	2.7L 4-cyl	2.7L 4-cyl	2L 4-cyl
Drivetrain	All-wheel drive	Rear-wheel drive	All-wheel drive	All-wheel drive	All-wheel drive	Rear-wheel drive	Rear-wheel drive	Rear-wheel drive	All-wheel drive	All-wheel drive	Rear-wheel drive	Rear-wheel drive	All-wheel drive	Rear-wheel drive	All-wheel drive	Rear-wheel drive
Transmission	Automatic	Automatic	Automatic	Automatic	Automatic	Automatic	Automatic	Automatic	Automatic	Automatic	Automatic	Automatic	Automatic	Automatic	Automatic	Automatic
Fuel	Gasoline	Gasoline	Gasoline	Gasoline	Gasoline	Gasoline	Gasoline	Gasoline	Gasoline	Gasoline	Gasoline	Gasoline	Gasoline	Gasoline	Gasoline	Gasoline
Body	Sedan	Sedan	Sedan	Sedan	Sedan	Sedan	Sedan	Sedan	Sedan	Sedan	Sedan	Sedan	Sedan	Sedan	Sedan	Sedan
Seats	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5
Doors	4-door	4-door	4-door	4-door	4-door	4-door	4-door	4-door	4-door	4-door	4-door	4-door	4-door	4-door	4-door	4-door
Median asking price	$24,650	$19,438	$25,488	$26,071	$25,642	Not recorded	Not recorded	Not recorded	$23,260	Not recorded	Not recorded	$20,895	Not recorded	$29,637	$32,470	$24,418
Price observations	40	21	25	14	8	Not recorded	Not recorded	Not recorded	5	Not recorded	Not recorded	9	Not recorded	12	20	23
Price sample updated	Oct 11, 2026	Oct 11, 2026	Oct 11, 2026	Oct 11, 2026	Oct 11, 2026	Not recorded	Not recorded	Not recorded	Oct 11, 2026	Not recorded	Not recorded	Oct 11, 2026	Not recorded	Oct 11, 2026	Oct 11, 2026	Oct 11, 2026

Missing data does not mean a feature is absent. Prices are advertised asking prices for each pattern’s own sample, not completed sale prices or a trim-wide average.

EXPLORE THE LINEUP

Find your CT4

Grouped by recorded trim, with engine and drive variants underneath. Open a variant to see every source pattern.

2021 CT4

Luxury

5 VIN patterns

2L 4-cyl · Gasoline · All-wheel drive · Automatic 2 patterns · View specs

1G6DK5RK-M → 509 VINs in our data

Sedan · 5 seats

$26,071 median asking price

14 price observations · Updated Oct 11, 2026

1G6DE5RK-M → 97 VINs in our data

Sedan · 5 seats

$23,260 median asking price

5 price observations · Updated Oct 11, 2026

2L 4-cyl · Gasoline · Rear-wheel drive · Automatic 3 patterns · View specs

1G6DJ5RK-9 → 1 VINs in our data

Sedan · 5 seats

No qualifying asking-price sample for this pattern.

Limited record — some specifications may be missing.

1G6DJ5RK-M → 734 VINs in our data

Sedan · 5 seats

$19,438 median asking price

21 price observations · Updated Oct 11, 2026

1G6DA5RK-M → 445 VINs in our data

Sedan · 5 seats

$20,895 median asking price

9 price observations · Updated Oct 11, 2026

2021 CT4

Premium Luxury

3 VIN patterns

2.7L 4-cyl · Gasoline · All-wheel drive · Automatic 1 pattern · View specs

1G6DF5RL-M → 228 VINs in our data

Sedan · 5 seats

$25,642 median asking price

8 price observations · Updated Oct 11, 2026

2.7L 4-cyl · Gasoline · Rear-wheel drive · Automatic 1 pattern · View specs

1G6DB5RL-M → 116 VINs in our data

Sedan · 5 seats

No qualifying asking-price sample for this pattern.

2L 4-cyl · Gasoline · All-wheel drive · Automatic 1 pattern · View specs

1G6DF5RK-M → 888 VINs in our data

Sedan · 5 seats

$24,650 median asking price

40 price observations · Updated Oct 11, 2026

2021 CT4

Premium Luxury Special Edition

4 VIN patterns

2.7L 4-cyl · Gasoline · All-wheel drive · Automatic 1 pattern · View specs

1G6D55RL-M → 18 VINs in our data

Sedan · 5 seats

No qualifying asking-price sample for this pattern.

Limited record — some specifications may be missing.

2.7L 4-cyl · Gasoline · Rear-wheel drive · Automatic 1 pattern · View specs

1G6D45RL-M → 10 VINs in our data

Sedan · 5 seats

No qualifying asking-price sample for this pattern.

Limited record — some specifications may be missing.

2L 4-cyl · Gasoline · All-wheel drive · Automatic 1 pattern · View specs

1G6D55RK-M → 24 VINs in our data

Sedan · 5 seats

No qualifying asking-price sample for this pattern.

2L 4-cyl · Gasoline · Rear-wheel drive · Automatic 1 pattern · View specs

1G6D45RK-M → 38 VINs in our data

Sedan · 5 seats

No qualifying asking-price sample for this pattern.

2021 CT4

Sport

2 VIN patterns

2L 4-cyl · Gasoline · All-wheel drive · Automatic 1 pattern · View specs

1G6DG5RK-M → 603 VINs in our data

Sedan · 5 seats

$25,488 median asking price

25 price observations · Updated Oct 11, 2026

2L 4-cyl · Gasoline · Rear-wheel drive · Automatic 1 pattern · View specs

1G6DC5RK-M → 524 VINs in our data

Sedan · 5 seats

$24,418 median asking price

23 price observations · Updated Oct 11, 2026

2021 CT4

V-Series

2 VIN patterns

2.7L 4-cyl · Gasoline · All-wheel drive · Automatic 1 pattern · View specs

1G6DH5RL-M → 352 VINs in our data

Sedan · 5 seats

$32,470 median asking price

20 price observations · Updated Oct 11, 2026

2.7L 4-cyl · Gasoline · Rear-wheel drive · Automatic 1 pattern · View specs

1G6DD5RL-M → 214 VINs in our data

Sedan · 5 seats

$29,637 median asking price

12 price observations · Updated Oct 11, 2026

Source: manufacturer specifications decoded through NHTSA vPIC, alongside VIN and listing records in our dataset. Trim groups are for browsing; shared labels do not establish identical equipment. Confirm options on the specific vehicle.

THE MARKET VIEW

What are 2021 CT4s listed for?

Explore model-year asking prices and available market history.

Explore prices →

BEFORE YOU CHOOSE

Go beyond the spec sheet

Equipment, fuel economy and safety results can vary with the vehicle’s engine, drivetrain and options.

Safety & recalls

Check the tested body style and drivetrain before comparing crash ratings.

Check NHTSA ratings → Check recalls by VIN →

Fuel economy

Match the engine and drivetrain to an EPA entry. A model-year fuel estimate may describe a different variant from yours.

Find the matching EPA vehicle →

Prices across model years

Compare current asking-price samples. Differences between model years are not a forecast of how one car will depreciate.

Asking-price history →