Vehicle
Cadillac DeVille
Cadillac's front-drive full-size saloon, and the car that became the DTS in 2006 with the nameplate retired rather than the vehicle replaced — a 2007 DTS is a 2000 DeVille with revisions, so parts and procedures cross that line. Almost all of them run the Northstar V8, whose head-bolt thread pull is the failure that decides what an overheat or a coolant-loss complaint on one of these actually costs: the block is aluminium, the threads strip, and a head gasket job becomes a time-serted engine-out repair. That, and the 4T80-E transaxle behind it, are what a diagnosis here turns on.
Generations
-
Seventh generation 1994–1999
The first DeVille on the Northstar. Base cars kept the older 4.9 HT V8 for two years, so a 1994 or 1995 car may be either engine and the diagnosis differs.
- Body styles
- Sedan
- Platform
- GM K-body
- Engines
-
- 4.9 V8 — L26 · petrol · 149 kW (200 hp) · 373 Nm (275 lb-ft) · 1994-1995 base
- 4.6 Northstar V8 — LD8 · petrol · 205 kW (275 hp) · 407 Nm (300 lb-ft)
- 4.6 Northstar V8 high-output — L37 · petrol · 224 kW (300 hp) · 386–400 Nm (285–295 lb-ft) · Concours
- Transmissions
- 4-speed 4T80-E automatic
- Drivetrain
- Front-wheel drive
-
Eighth generation 1999–2005
G-body, sold as DeVille, DHS and DTS trims. Night Vision, StabiliTrak and road-sensing suspension arrive, so an electrical complaint here has far more modules behind it than the previous car.
- Body styles
- Sedan
- Platform
- GM G-body
- Engines
-
- 4.6 Northstar V8 — LD8 · petrol · 205 kW (275 hp) · 407 Nm (300 lb-ft)
- 4.6 Northstar V8 high-output — L37 · petrol · 224 kW (300 hp) · 386–400 Nm (285–295 lb-ft) · DTS
- Transmissions
- 4-speed 4T80 automatic
- Drivetrain
- Front-wheel drive
-
DTS 2005–2011
The same G-body car under a new name. Widely used as a limousine and hearse base, so a very high-mileage example is normal rather than exceptional.
- Body styles
- Sedan
- Platform
- GM G-body
- Engines
-
- 4.6 Northstar V8 — LD8 · petrol · 205 kW (275 hp) · 407 Nm (300 lb-ft)
- 4.6 Northstar V8 high-output — L37 · petrol · 218 kW (292 hp) · 386–400 Nm (285–295 lb-ft) · Performance
- Transmissions
- 4-speed 4T80 automatic
- Drivetrain
- Front-wheel drive
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
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