Factory build sheet

2021 Cadillac CT4 Premium Luxury

Build 1G6DB5RL-M · 2.7L 4cyl · Rear-wheel drive · Sedan

VIN positions 1 through 8 read 1G6DB5RL and position 10 reads M. Those nine characters define this build. Position 9 and positions 11 through 17 differ on every car.

Every CT4 whose VIN starts 1G6DB5RL and carries M in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 116 of them.

  • Decoded Jul 7, 2026
  • 116 known VINs
  • 2 listed for sale now

Factory specification

As filed by Cadillac with NHTSA for this build. Fields the filing does not record are left out entirely — a missing row means no recorded value, not a missing feature.

Engine

Displacement
2.7 L
Cylinders
4
Configuration
In-Line
Engine model
L3B
Valve train
Dual Overhead Cam (DOHC)
Turbocharged
Yes
Fuel type
Gasoline

Drivetrain

Drive type
Rear-wheel drive
Transmission
Automatic
Forward speeds
8

Body & chassis

Body class
Sedan/Saloon
NHTSA body type
PASSENGER CAR
Doors
4
Seats
5
Seat rows
2
Manufacturer
GENERAL MOTORS LLC

Weight rating

GVWR class
Class 1
GVWR
6,000 lb or less

Gross vehicle weight rating is the loaded ceiling set by the manufacturer, not the car's own weight.

Driver assistance, as built

  • Forward collision warning Standard
  • Crash imminent braking Optional
  • Lane departure warning Optional
  • Lane keeping assistance Optional
  • Adaptive cruise control Optional
  • Blind spot warning Standard

Systems the filing does not record are not listed above. Check the window sticker of the exact car before you rely on any single feature.

What this build asks today

Asking prices of live dealer listings decoded to this exact configuration — narrower than the trim-level figure, because every car counted here shares the same engine, transmission and drivetrain.

$29,987 median asking price · 6 listings · as of Aug 30, 2026

Too few listings to publish a price range — with 6 cars on the market, the cheapest and the dearest are single cars, not a spread. The median above is what they ask in the middle.

Compare every 2021 CT4 trim and its price →

The same build, other model years

Cadillac used the VIN pattern 1G6DB5RL for 7 model years. Nothing but the year changes between these pages, so the price gap between them is depreciation on an identical car.

$20,991 2020 $29,987 2021 $36,452 2025 $49,089 2026

How this VIN pattern is read

A 17-character VIN carries two kinds of information: what was built, and which one it is. This page is the first kind — the nine highlighted positions.

Positions Characters What they encode
1–3 1G6 GENERAL MOTORS LLC · World manufacturer identifier
4–8 DB5RL Model, body style, engine and restraint system
9 × Check digit — computed per vehicle, not part of the build
10 M Model year — 2021
11 × Assembly plant
12–17 ×××××× Production sequence number, unique to each vehicle

116 vehicles carry this build

Every VIN we have decoded to 1G6DB5RL-M shares the specification above.

  • 116 Known VINs
  • 2 Listed for sale now
  • 6 Priced listings
  • $29,987 Median asking

Cars are filed by a fixed rule based on the VIN, so a car never moves between groups.

Browse all 116 VINs of this build →

Neighboring configurations

Other factory configurations of the CT4, each with its own build sheet. The set is fixed by the VIN patterns themselves, so it does not shuffle as prices or inventory move.

Keep going

Where this data comes from

Specification fields are decoded from the manufacturer's filings in the NHTSA vPIC database, keyed on VIN positions 1–8 and 10. We publish the filed values as they stand and leave out anything the filing does not record.

Prices are asking prices from 6 live dealer listings decoded to this build , last updated August 30, 2026 . They are what sellers ask, not what buyers paid.

Vehicle counts come from the 116 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.