Vehicle
Chevrolet Suburban
The long-wheelbase full-size SUV, and mechanically a Tahoe with more length behind the rear axle — Tahoe information covers the powertrain completely and the Suburban-specific part is the rear suspension load, the longer exhaust and the extra body electrics. The small-block V8s here use Active Fuel Management, which shuts down cylinders under light load, and its lifters are the standing fault: a collapsed AFM lifter sets a misfire code on a specific cylinder and is an engine-out repair rather than a coil.
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Generations
-
GMT400 1992–1999
Throttle-body then Vortec injection, and the 6.5 turbo diesel — whose pump-mounted driver module is the classic heat-soak no-restart.
- Body styles
- SUV
- Platform
- GM GMT400
- Engines
-
- 5.7 V8 — petrol · Vortec L31
- 7.4 V8 — L29 · petrol
- 6.5 V8 turbo diesel — diesel
- Transmissions
- 4-speed 4L60 automatic · 4-speed 4L80 automatic
- Drivetrain
- Rear-wheel drive · Part-time four-wheel drive with low range
-
GMT800 2000–2006
The three-quarter-ton 2500 keeps the 8.1 big block, which shares almost nothing with the 5.3 in the half-ton beside it.
- Body styles
- SUV
- Platform
- GM GMT800
- Engines
-
- 5.3 V8 — petrol · 213–220 kW (286–295 hp) · 434–454 Nm (320–335 lb-ft)
- 6.0 V8 — LQ4 · petrol · 224–239 kW (300–321 hp) · 508 Nm (375 lb-ft)
- 8.1 V8 — L18 · petrol · 239 kW (321 hp) · 597–603 Nm (440–445 lb-ft) · 2500
- Transmissions
- 4-speed 4L60E automatic · 4-speed 4L65E automatic · 4-speed 4L80E automatic · 4-speed 4L85E automatic
- Drivetrain
- Rear-wheel drive · Four-wheel drive
-
GMT900 2006–2014
A long Tahoe; Active Fuel Management lifter collapse is the fault behind most of its cylinder-specific misfires.
- Body styles
- SUV
- Platform
- GMT900
- Engines
-
- 5.3 V8 — LY5 · petrol · 461 Nm (340 lb-ft)
- 6.0 V8 — petrol
- 6.2 V8 — petrol · 301 kW (404 hp)
- Transmissions
- 4-speed automatic · 6-speed 6L80 automatic (1500 only) · 6-speed 6L90 automatic (2500 only)
- Drivetrain
- Rear-wheel drive · Four-wheel drive
-
T1XX 2020–present
Independent rear suspension at last, and a Duramax straight-six diesel option — both changes to systems the earlier trucks did not have.
- Body styles
- SUV
- Platform
- GM T1XX
- Engines
-
- 5.3 V8 — L84 · petrol · 265 kW (355 hp) · 519 Nm (383 lb-ft)
- 6.2 V8 — petrol
- 3.0 Duramax straight-six — LM2 · diesel · 207–227 kW (278–304 hp) · 624–671 Nm (460–495 lb-ft)
- Transmissions
- 10-speed automatic
- Drivetrain
- Rear-wheel drive · Four-wheel drive
Service information
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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