Skip to content
Trimslate
SavedHelp

2021 Cadillac

CT5

Auto (S10), 6 cyl, 3.0 L, Turbo

Cadillac CT5: best and worst years
2021 Cadillac CT5 (photo 1 of 2)
2021 photoElise240SXCC BY-SA 4.0Wikimedia Commons

Overview

Body
Midsize CarsEPA, from EPA, last updated 6/22/2026
Drivetrain
Rear-Wheel DriveEPA, from EPA, last updated 6/22/2026
Transmission
Automatic (S10)EPA, from EPA, last updated 6/22/2026
Powertrain
GasEPA, from EPA, last updated 6/22/2026
Fuel
PremiumEPA, from EPA, last updated 6/22/2026

Engine & performance

HP
335
Power to weight
0.088 hp/lb
Axle ratio
2.85
Cyl
6EPA, from EPA, last updated 6/22/2026
Aspiration
TurbochargedEPA, from EPA, last updated 6/22/2026
Start-stop system
YesEPA, from EPA, last updated 6/22/2026

Efficiency

MPG Hwy
28 mpgEPA, from EPA, last updated 6/22/2026
MPG City
19 mpgEPA, from EPA, last updated 6/22/2026
MPG Comb
22 mpgEPA, from EPA, last updated 6/22/2026
Fuel $/yr
$3,500EPA, from EPA, last updated 6/22/2026
CO₂
404 g/miEPA, from EPA, last updated 6/22/2026
Eco Score
4/10EPA, from EPA, last updated 6/22/2026
Smog score
5/10
Elec. Range
0 miEPA, from EPA, last updated 6/22/2026
SmartWay certified
No

Dimensions & capacity

Length
194 inNHTSA vPIC, from NHTSA vPIC, last updated 6/4/2026
Width
74 inNHTSA vPIC, from NHTSA vPIC, last updated 6/4/2026
Height
57 inNHTSA vPIC, from NHTSA vPIC, last updated 6/4/2026
Wheelbase
116 inNHTSA vPIC, from NHTSA vPIC, last updated 6/4/2026
Curb Weight
3,799 lbNHTSA vPIC, from NHTSA vPIC, last updated 6/4/2026
Pass. Vol
99 ft³EPA, from EPA, last updated 6/22/2026
Cargo Vol
13 ft³EPA, from EPA, last updated 6/22/2026

Safety NHTSA, model year

Overall crash rating
★★★★★
Rollover rating
★★★★★
Stability control (ESC)
Standard
Forward-collision warning
Standard
Lane-departure warning
Optional
Recalls
4
Owner complaints
19
Reported injuries
2

Reported problems NHTSA owner complaints, model year

  • ELECTRICAL SYSTEM25%
  • STRUCTURE11%
  • AIR BAGS7%
  • FORWARD COLLISION AVOIDANCE7%
  • POWER TRAIN7%
  • UNKNOWN OR OTHER7%

Source: NHTSA owner complaints, 28 total.

Cadillac CT5: best and worst years

Federal investigations NHTSA defect investigations, model year

  • PE21010opened Apr 9, 2021AIR BAGS:SRS MALFUNCTION WARNING LAMP/LIGHT

    Air Bag Malfunction

Known issues manufacturer service bulletins, model year

596 service bulletins filed with NHTSA for this model year

  • May 11, 2026UNKNOWN OR OTHERPIC6551B

    This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues

  • May 11, 2026UNKNOWN OR OTHERPIC6423A

    Pi created to provide GM dealers with information on gathering information for projection issue

  • Apr 25, 2026UNKNOWN OR OTHERPIT6511

    This Preliminary information communicates an issue with a replace or low FOB battery message

  • Apr 20, 2026UNKNOWN OR OTHERPIT6507

    This PI communicates information on a SPS programming issue causing Serial Data Authentication Configuration to fail.

  • Apr 1, 2026UNKNOWN OR OTHERPIT3271Q

    This preliminary information communicates information about how to determine if a wheel and tires size change is available.

  • Mar 9, 2026UNKNOWN OR OTHERPIP6104

    This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.

  • Mar 9, 2026UNKNOWN OR OTHERPIP4902V

    This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.

  • Mar 2, 2026UNKNOWN OR OTHERPIT6425D

    This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC'ss

  • and 588 more

Source: NHTSA manufacturer communications (technical service bulletins).

Warranty manufacturer terms, by make

Basic
4 yr / 50k mi
Powertrain
6 yr / 70k mi
Roadside assistance
6 yr / 70k mi
Maintenance
1 yr / 12k mi
EV battery
8 yr / 100k mi

Information is gathered on a best-effort basis from public sources, may be incomplete or out of date, and is not purchasing or financial advice. Verify with the manufacturer or dealer before buying.