July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Model Coverage

2003 MODEL COVERAGE

MODEL

BODY CODE ⁽¹⁾

ENGINE (RPO CODE) ⁽²⁾

ENGINE ID

FUEL SYSTEM

IGNITION SYSTEM

Astro & Safari

L, M

4.3L (L35)

X

SFI

DIS

Avalanche

C, K

5.3L (LM7)

T

SFI

DIS

.....

.....

8.1L (L18)

G

SFI

DIS

Aztek

B

3.4L (LA1)

E

SFI

DIS

Blazer & Jimmy Canadian

S, T

4.3L (LU3)

X

CSFI

DIS

Bravada

S, T

4.2L (LL8)

S

SFI

DIS

Cab & Chassis

C

6.0L (LQQ4)

U

SFI

DIS

.....

....

6.6L (LB7)

1

Turbo Diesel

N/A

.....

.....

8.1L (L18)

G

SFI

DIS

Chevy Express & Savana

G

4.3L (LU3)

X

CSFI

Magnetic ⁽³⁾

.....

.....

4.8L (LR4)

V

SFI

DIS

.....

.....

5.3L (LM7)

T

SFI

Magnetic ⁽³⁾

.....

.....

6.0L (LQ4)

U

SFI

DIS

Cutaway

G

6.0L (LQ4)

U

SFI

DIS

.....

.....

6.5L (L65)

F

Turbo Diesel

N/A

Envoy

S, T

4.2L (LL8)

S

SFI

DIS

Envoy XL

S, T

4.2L (LL8)

S

SFI

DIS

.....

....

5.3L (LM4)

P

SFI

DIS

Escalade

C

5.3L (LM7)

T

SFI

DIS

.....

K

6.0L (LQ9)

N

SFI

DIS

Escalade ESV & EXT

K

6.0L (LQ9)

N

SFI

DIS

Montana & Venture

U, X

3.4L (LA1)

E

SFI

DIS

H2

.....

6.0L (LQ4)

U

SFI

DIS

Rendezvous

A

3.4L (LA1)

E

SFI

DIS

RV Cutaway

G

6.0L (LQ4)

U

SFI

DIS

Sierra & Silverado

C, K

4.3L (LU3)

X

CSFI

Magnetic ⁽³⁾

.....

.....

4.8L (LR4)

V

SFI

DIS

.....

.....

5.3L (LM7)

T

SFI

DIS

.....

.....

6.0L (LQ4)

U

SFI ⁽⁴⁾

DIS

.....

.....

6.0L (LQ4/KL6)

U

SFI ⁽⁵⁾

DIS

.....

.....

6.0L (LQ4/KL8)

U

SFI ⁽⁶⁾

DIS

.....

.....

6.6L (LB7)

1

Turbo Diesel

N/A

.....

.....

8.1L (L18)

G

SFI

DIS

Silhouette

X

3.4L (LA1)

E

SFI

DIS

Sonoma & S10 Pickup

S

2.2L (L43)

5

SFI ⁽⁷⁾

DIS

.....

S, T

4.3L (LU3)

X

CSFI

Magnetic ⁽³⁾

SSR

.....

5.3L (LM4)

P

SFI

DIS

Suburban

C, K

5.3L (LM7)

T

SFI

DIS

.....

.....

5.3L (L59)

Z

SFI ⁽⁷⁾

DIS

.....

.....

6.0L (LQ4)

U

SFI

DIS

.....

.....

8.1L (L18)

G

SFI

DIS

Tahoe

C, K

4.8L (LR4)

V

SFI

DIS

.....

.....

5.3L (LM7)

T

SFI

DIS

.....

.....

5.3L (L59)

Z

SFI ⁽⁷⁾

DIS

Tracker

J & E

2.0L (L34)

C

MFI

DIS

.....

.....

2.5L (LE8)

4

SFI

DIS

TrailBlazer

S & T

4.2L (LL8)

S

SFI

DIS

.....

.....

5.3L (LM4)

P

SFI

DIS

Vue

.....

2.2L (L61)

D

SFI

DIS

.....

.....

3.0L (L81)

B

SFI

DIS

Yukon

.....

4.8L (LR4)

V

SFI

DIS

.....

.....

5.3L (LM7)

T

SFI

DIS

.....

.....

5.3L (L59)

Z

SFI ⁽⁷⁾

DIS

.....

.....

6.0L (LQ4)

U

SFI

DIS

Yukon XL

C, K

5.3L (LM7)

T

SFI

DIS

.....

.....

5.3L (L59)

Z

SFI ⁽⁷⁾

DIS

.....

.....

6.0L (LQ4)

U

SFI

DIS

.....

.....

8.1L (L18)

G

SFI

DIS Magnetic

⁽¹⁾	Series designation.

⁽²⁾	Engine code is stamped on engine block. See ENGINE CODE LOCATION .

⁽³⁾	Uses Enhanced Electronic Ignition (EEI), utilizing a camshaft and crankshaft position sensor.

⁽⁴⁾	Gasoline vehicle.

⁽⁵⁾	Bi-fuel vehicle.

⁽⁶⁾	Compressed Natural Gas (CNG) vehicle.

⁽⁷⁾	Flex-fuel vehicle.