Chevy 2.8L V6 TBI Swap – ECMs 1227429 and 1228062 Pinout

1227429 Pinout (1228062 differences noted)

A1 Green/white Fuel pump relay

A2 Dark brown A/C clutch control (not used 1228062)

A3 ***not used*** (1228062 Green/yellow Canister purge control (not used))

A4 Gray EGR control (1228062 Gray/red)

A5 Brown/white Service Engine Soon light

A6 Pink/black 12V switched power

A7 Tan/black TCC or shift light

A8 Orange/green Serial data at ALDL (1228062 orange)

A9 White/black Diagnostic input at ALDL

A10 Brown VSS input

A11 Purple MAP ground

A12 Black/white System ground


B1 Orange Battery 12V

B2 Tan/white Fuel pump signal

B3 Black/red HEI ignition module ground

B4 ***not used***

B5 Purple/white HEI reference

B6 ***not used***

B7 Black ESC signal

B8 Dark green A/C signal

B9 Brown EGR switch signal

B10 Orange/black Park/neutral switch

B11 ***not used***

B12 ***not used***


C1 Pink/black EAC solenoid (Federal) (1228062 Black/pink AIR divert solenoid (not used?) )

C2 Brown EAC solenoid (California) (1228062 Brown AIR switch solenoid)

C3 Green/black IAC Coil B low

C4 Green/white IAC Coil B high

C5 Blue/white IAC Coil A high

C6 Blue/black IAC Coil A low

C7 ***not used*** (1228062 Light blue 4th gear (not used?))

C8 ***not used***

C9 Purple/white Crank input

C10 Yellow CTS signal

C11 Light green MAP signal

C12 Dark blue/white ETM (1228062 not used)

C13 Dark blue TPS signal

C14 Gray 5V reference (MAP, TPS)

C15 ***not used***

C16 Orange Battery 12V


D1 Tan/white System ground (1228062 black/white)

D2 Black MAP ground (1228062 TPS, CTS ground)

D3 ***not used***

D4 White EST

D5 Tan/black EST bypass

D6 Tan Oxygen sensor ground

D7 Purple Oxygen sensor signal

D8 ***not used***

D9 ***not used***

D10 ***not used***

D11 ***not used***

D12 ***not used***

D13 ***not used***

D14 Light green Injector drive B

D15 ***not used***

D16 Light blue Injector drive A


1228062 ECM Pinout

A1 Green/white Fuel pump relay

A2 ***not used***

A3 Green/yellow Canister purge control (not used)

A4 Gray/red EGR control

A5 Brown/white Service Engine Soon light

A6 Pink/black 12V switched power

A7 Tan/black TCC or shift light

A8 Orange Serial data at ALDL

A9 White/black Diagnostic input at ALDL

A10 Brown VSS input

A11 Purple MAP ground

A12 Black/white System ground


B1 Orange Battery 12V

B2 Brown Fuel pump signal

B3 Black/red HEI ignition module ground

B4 ***not used***

B5 Purple/white HEI reference

B6 ***not used***

B7 Black ESC signal

B8 Dark green A/C signal

B9 Blue EGR temperature sensor (not used?)

B10 Orange/black Park/neutral switch

B11 ***not used***

B12 ***not used***


C1 Black/pink AIR divert solenoid (not used?)

C2 Brown AIR switch solenoid

C3 Green/black IAC Coil B low

C4 Green/white IAC Coil B high

C5 Blue/white IAC Coil A high

C6 Blue/black IAC Coil A low

C7 Light blue 4th gear (not used?)

C8 ***not used***

C9 Purple/white Crank input

C10 Yellow CTS signal

C11 Light green MAP signal

C12 ***not used***

C13 Dark blue TPS signal

C14 Gray 5V reference (MAP, TPS)

C15 Light green Injector B (not used?)

C16 Orange Battery 12V


D1 Black/white System ground

D2 Black TPS, CTS ground

D3 ***not used***

D4 White EST

D5 Tan/black EST bypass

D6 Tan Oxygen sensor ground

D7 Purple Oxygen sensor signal

D8 ***not used***

D9 ***not used***

D10 ***not used***

D11 ***not used***

D12 ***not used***

D13 ***not used***

D14 Light green Injector drive B

D15 Light blue Injector drive A (not used?)

D16 Light blue Injector drive A