2003 CHEVROLET Impala L61/LS1 (GMX220)

GMX220 / 4-door sedan / North America / select global markets

L61LS1Registro exacto de año/versiónSilver

Engine identity

Engine code

L61, LS1

Engine summary

The 2003 Chevrolet Impala was primarily offered with two main engines: the 3.4L V6 (code L61) for base trims, and the 3.8L V6 (code LS1) for more upscale trims in some markets. The L61 is an aluminum 3.4L V6 producing around 180 hp. Some police or fleet versions used a 3.8L V6 variant.

Displacement

3.4L (3345 cc) and 3.8L (3799 cc)

Power

180 hp (3.4L L61), approx. 200-210 hp (3.8L LS1 variant, market dependent)

Torque

200 Nm (3.4L L61) approx. 298 Nm (3.8L LS1 variant)

Fuel system

Sequential multiport fuel injection

Timing drive

Timing chain

Puerto OBD

Verify by VIN and market

Oils and fluids

Tipo de aceite

SAE 5W-30 synthetic or conventional per GM specifications

Capacidad de aceite

Approximately 5.7 liters / 6 quarts (service fill including filter change)

Refrigerante

Approx. 10.5 liters

Fluido

DEXRON III/Mercon ATF

Differential fluid

GM recommended SAE 80W-90 gear oil (if applicable)

Líquido de frenos

DOT 3 or DOT 4

Service and parts data

Manual transmission

Not commonly offered in 2003 Impala in North America

Automatic transmission

4-speed automatic (4T65-E electronically controlled)

Spark plugs

Standard GM Iridium or platinum tipped plugs (gap approx. 0.044 in/1.1 mm)

Service interval

Approx. 8,000-12,000 km or 5,000-7,500 miles depending on market and driving conditions

Medidas de neumáticos

P205/65R15, P215/60R16

Torque de rueda

Verify by VIN and market

Common and chronic problems

Intake manifold gasket leaks
Transmission slipping in older units
Ignition coil failures

First checks

Check for coolant leaks around intake manifold
Verify transmission fluid condition and level
Inspect ignition coils and spark plugs

Antes de cambiar piezas

Save fault codes and freeze-frame data before clearing anything.
Check engine oil, coolant and transmission fluid using the correct temperature and service procedure.
Verify power, ground, connectors, hoses, leaks and live data before replacing expensive parts.

Important notes

Engine variants and outputs may differ in non-North American markets.
The 3.8L V6 LS1 in the Impala is different from the LS1 V8 used in performance GM vehicles.

Códigos comunes

Source and verification notes

Chevrolet 2003 Impala owner's manual and service manual excerpts
GM official parts catalog and engine specifications for 2003 Impala

Herramientas compatibles

Verify by VIN and market

Preguntas frecuentes

What engine code does the 2003 CHEVROLET Impala L61/LS1 (GMX220) use? 2003 CHEVROLET Impala L61/LS1 (GMX220) is listed here with engine code L61, LS1; engine summary: The 2003 Chevrolet Impala was primarily offered with two main engines: the 3.4L V6 (code L61) for base trims, and the 3.8L V6 (code LS1) for more upscale trims in some markets. The L61 is an aluminum 3.4L V6 producing around 180 hp. Some police or fleet versions used a 3.8L V6 variant..
What oil and capacity does the 2003 CHEVROLET Impala L61/LS1 (GMX220) use? 2003 CHEVROLET Impala L61/LS1 (GMX220) is listed with SAE 5W-30 synthetic or conventional per GM specifications and oil capacity Approximately 5.7 liters / 6 quarts (service fill including filter change). Confirm market and engine option before service.
What are common 2003 CHEVROLET Impala L61/LS1 (GMX220) problems? Highlighted checks for 2003 CHEVROLET Impala L61/LS1 (GMX220): Intake manifold gasket leaks, Transmission slipping in older units, Ignition coil failures.

Engine identity

Engine code

L61, LS1

Engine summary

Displacement

3.4L (3345 cc) and 3.8L (3799 cc)

Power

180 hp (3.4L L61), approx. 200-210 hp (3.8L LS1 variant, market dependent)

Torque

200 Nm (3.4L L61) approx. 298 Nm (3.8L LS1 variant)

Fuel system

Sequential multiport fuel injection

Timing drive

Timing chain

Puerto OBD

Verify by VIN and market

Oils and fluids

Tipo de aceite

SAE 5W-30 synthetic or conventional per GM specifications

Capacidad de aceite

Approximately 5.7 liters / 6 quarts (service fill including filter change)

Refrigerante

Approx. 10.5 liters

Fluido

DEXRON III/Mercon ATF

Differential fluid

GM recommended SAE 80W-90 gear oil (if applicable)

Líquido de frenos

DOT 3 or DOT 4

Service and parts data

Manual transmission

Not commonly offered in 2003 Impala in North America

Automatic transmission

4-speed automatic (4T65-E electronically controlled)

Spark plugs

Standard GM Iridium or platinum tipped plugs (gap approx. 0.044 in/1.1 mm)

Service interval

Approx. 8,000-12,000 km or 5,000-7,500 miles depending on market and driving conditions

Medidas de neumáticos

P205/65R15, P215/60R16

Torque de rueda

Verify by VIN and market

Preguntas frecuentes

What engine code does the 2003 CHEVROLET Impala L61/LS1 (GMX220) use? 2003 CHEVROLET Impala L61/LS1 (GMX220) is listed here with engine code L61, LS1; engine summary: The 2003 Chevrolet Impala was primarily offered with two main engines: the 3.4L V6 (code L61) for base trims, and the 3.8L V6 (code LS1) for more upscale trims in some markets. The L61 is an aluminum 3.4L V6 producing around 180 hp. Some police or fleet versions used a 3.8L V6 variant..

What oil and capacity does the 2003 CHEVROLET Impala L61/LS1 (GMX220) use? 2003 CHEVROLET Impala L61/LS1 (GMX220) is listed with SAE 5W-30 synthetic or conventional per GM specifications and oil capacity Approximately 5.7 liters / 6 quarts (service fill including filter change). Confirm market and engine option before service.

What are common 2003 CHEVROLET Impala L61/LS1 (GMX220) problems? Highlighted checks for 2003 CHEVROLET Impala L61/LS1 (GMX220): Intake manifold gasket leaks, Transmission slipping in older units, Ignition coil failures.

2003 CHEVROLET Impala L61/LS1 (GMX220)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

First checks

Antes de cambiar piezas

Important notes

Scanning Engine...

2003 CHEVROLET Impala L61/LS1 (GMX220)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

First checks

Antes de cambiar piezas

Important notes