GMT800 to E40/T42 conversion table
04-12-2014, 10:19 AM
#1
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GMT800 to E40/T42 conversion table I have just completed swapping from the GMT800 PCM to the later E40/T42 combination. This was a requirement for the CAN-BUS feature to run my Speedhut dash.
Along the way I modified the truck harness with the correct connectors for the E40/T42.
I also learned that an LS3 throttle body will work with this combination.
I did an exhaustive bit of research, most of it said this absolutely could not be done. Well I am here to tell you this is false!
I won't say it is cheap or easy, but it can be done.
EFI connection supplied all of the terminals and plugs for the swap, BlueCat Tuning did the basic PCM/TCM flash, a local auto salvage yard supplied the PCM and matching pedal assembly and an Ebay vendor provided the TB adapter. I proved that the LS3 throttle body will work without a hitch. Yes it will go to full throttle opening and not throw a code.
If anyone needs further information please PM. I will be happy to assist.
GMT800 to E40/T42 harness conversion
GMT800 BLUE=B GREEN=G E40 BLUE=B BLACK=K GRAY=G T42=T
GMT800 E40 COLOR CIRCUIT # DESCRIPTION
B01 GROUND
B02 K43 LT GRN 1867 12 V REF
B03 K09 PNK/BLK 1746 FI #3
B04 K06 LT GRN/BLK 1745 FI #2
B05
B06
B07 K37 GRY 2705 5V REF OIL PRESS
B08
B09
B10
B11 K72 LT BLU 1876 KNOCK SENSOR 2
B12 K62 DK BLU/WHT 1869 CKP SENSOR
B13
B14
B15
B16
B17 T44 DK BLU/WHT 1225 TRANS FLUID PRESS SW SIG B
B18 T33 RED 1226 TRANS FLUID PRESS SW SIG C
B19 B19 PINK 439 IGN 1 VOLTAGE
B20 T32 ORANGE 440 BATTERY +
B21 K14 YEL/BLK 1868 CRANK POSITION GRND
B22
B23
B24 GROUND
B25
B26 K70 TAN 1667 O2 LOW BANK2/1
B27 GROUND
B28
B29 K49 TAN 1664 O2 LOW BANK1/1
B30
B32 T32 BLK/WHT 771 TRANS RANGE SWITCH SIG A
B31 B46 PURPLE 420 TCC BRAKE SWITCH CC RELEASE
B33
B34
B35
B36 K05 BLACK 1744 FI #1
B37 K13 YEL/BLK 846 FI #6
B38
B39
B40 GROUND
B41
B42 B36 FAN RELAY #1
B43 K07 RED/BLK 877 FI #7
B44 K08 LT BLU/BLK 844 FI #4
B45
B46
B47
B48 G35 GRY 597 5V REF
B49
B50
B51
B52
B53
B54 K20 ORG/BLK 469 LOW REF MAP
B55
B56
B57 B20 ORG/BLK 440 BATTERY +
B58 B16 DK GRN 1049 CLASS 2 SERIAL DATA(NOT REQ)
B59
B60
B61 K15 PNK/BLK 632 LOW REF CAM SENSOR
B62
B63 K21 BLK/WHT 2755 LOW REF OIL PRESS
B64 GROUND
B65
B66 K51 PURPLE 1666 O2 HIGH SIG BANK 2/1
B67 GROUND PCM GROUND
B68
B69 K48 PUR/WHT 1665 O2 HIGH SIG BANK 1/1
B70
B71
B72 T46 YELLOW 772 TRANS RANGE SWITCH SIG B
B73 K26 BRN/WHT 633 CAM SENSOR SIGNAL
B74 K55 YELLOW 410 ECT SENSOR SIGNAL
B75 B18 PINK 1020 OFF/RUN/CRANK 12V
B76 K10 BLK/WHT 845 FI #5
B77 K04 DK BLU/WHT 878 FI #8
B78
B79 T14 WHT 687 2-3 SHIFT SOLENOID
B80
G01 GROUND PCM GROUND
G02 T01 BRN 418 TCC PWM SOLENOID VALVE
G03
G04
G05
G06 T40 RED/BLK 1228 PC SOL VALVE HIGH CNTRL
G07
G08 T17 LT BLU/WHT 1229 PV SOL VALVE LOW CNTRL
G09 B45 DK GRN/WHT 465 FUEL PUMP SIGNAL
G10 B48 WHITE 121 TACH SIGNAL
G11
G12
G13
G14
G15 K45 BRN 25 ALT GBCM
G16
G17
G18
G19
G20 T16 LT GRN/BLK 822 VSS LOW
G21 T21 PUR/WHT 821 VSS HIGH
G22
G23
G24
G25 G34 TAN 472 IAT SENSOR SIGNAL
G26 K54 PURPLE 2121 IC #1
G27 K53 RED/BLK 2127 IC #7
G28 K57 LT BLU/WHT 2126 IC #6
G29 K58 GK GRN/WHT 2124 IC #4
G30
G31 G11 YELLOW 492 MAF SENSOR
G32 K46 LT GRN 432 MAP
G33 B56 FAN 2 RELAY
G34
G35
G36
G37
G38
G39 K44 RED 631 12V REF CMP
G40 GROUND
G41
G42 T25 TAN/BLK 422 TCC SOL CNTRL
G43
G44
G45
G46 B04 BRN/WHT 419 MIL
G47 T20 YEL/BLK 1223 2-3 SHIFT SOLENOID
G48 T02 LT GRN 1222 1-2 SHIFT SOLENOID
G49
G50 B21 DK GRN/WHT 817 VSS OUT
G51 T35 YEL/BLK 1227 TFT SENSOR
G52
G53
G54
G55
G56
G57 T45 BLACK 552 LOW REF AT
G58 K24 TAN/WHT 332 OIL PRESS SIGNAL
G59
G60 K16 BROWN 2129 IGN CNTRL REF LOW BANK 1
G61 K64 BRN/WHT 2130 IGN CNTRL REF LOW BANK 2
G62 T23 GRAY 773 TRANS RANGE SWITCH SIGNAL C
G63 T24 PINK 1224 TRANS FLUIS PRES SWITCH SIG A
G64
G65
G66 K65 PPL/WHT 2128 IC #8
G67 K66 RED/WHT 2122 IC #2
G68 K59 DK GRN 2125 IC #5
G69 K61 LT BLUE 2123 IC #3
G70
G71
G72 K02 BLK/WHT 3113 02 HEAT LOW BANK 1/1
G73
G74 K01 LT GRN 3212 02 HEAT LOW BANK 2/1
G75 K56 BRN 23 ALT FIELD DUTY CYCLE
G76
G77
G78
G79
G80
B01 TN/WHT 2500 HI SPEED GMALN + (CAN-BUS)
B02 TAN 2501 HI SPEED GMALN - (CAN-BUS)
B14 PNK 839 IGNITION 12V
PED1 B07 BROWN 1271 REF LOW SIG
PED2 B35 WHT/BLK 1164 5V REF
PED3 B41 LT BLUE 1162 APP SENSOR 2 SIG
PED5 B22 DK BLU 1161 APP SENSOR 1 SIG
PED6 B29 TAN 1274 5V REF
PED7 B08 PURPLE 1272 REF LOW SIG
TAC2 K31 DK GRN 485 5V REF
TAC3 K29 PURPLE 486 LOW REF
TAC4 B17 GRAY 397 CRUISE ON
TAC5 B33 GRY/BLK 87 CRUISE RES/ACC
TAC6 B32 LT BLU 20 CHMSL SUPPLY
TAC 7 B19 PINK 539 IGN 12V
TB4 K60 BROWN 582 TAC MOT CNTRL 2
TB2 K63 YELLOW 581 TAC MOT CNTRL 1
TB1 K52 BLACK 1704 LOW REF
TB6 K31 DK GRN 486 TP SENSOR 2
TB7 K29 PURPLE 485 TP SENSOR 1
TB8 K41 LT BLU/BLK 1688 5V REF
K73 BLACK GROUND
Along the way I modified the truck harness with the correct connectors for the E40/T42.
I also learned that an LS3 throttle body will work with this combination.
I did an exhaustive bit of research, most of it said this absolutely could not be done. Well I am here to tell you this is false!
I won't say it is cheap or easy, but it can be done.
EFI connection supplied all of the terminals and plugs for the swap, BlueCat Tuning did the basic PCM/TCM flash, a local auto salvage yard supplied the PCM and matching pedal assembly and an Ebay vendor provided the TB adapter. I proved that the LS3 throttle body will work without a hitch. Yes it will go to full throttle opening and not throw a code.
If anyone needs further information please PM. I will be happy to assist.
GMT800 to E40/T42 harness conversion
GMT800 BLUE=B GREEN=G E40 BLUE=B BLACK=K GRAY=G T42=T
GMT800 E40 COLOR CIRCUIT # DESCRIPTION
B01 GROUND
B02 K43 LT GRN 1867 12 V REF
B03 K09 PNK/BLK 1746 FI #3
B04 K06 LT GRN/BLK 1745 FI #2
B05
B06
B07 K37 GRY 2705 5V REF OIL PRESS
B08
B09
B10
B11 K72 LT BLU 1876 KNOCK SENSOR 2
B12 K62 DK BLU/WHT 1869 CKP SENSOR
B13
B14
B15
B16
B17 T44 DK BLU/WHT 1225 TRANS FLUID PRESS SW SIG B
B18 T33 RED 1226 TRANS FLUID PRESS SW SIG C
B19 B19 PINK 439 IGN 1 VOLTAGE
B20 T32 ORANGE 440 BATTERY +
B21 K14 YEL/BLK 1868 CRANK POSITION GRND
B22
B23
B24 GROUND
B25
B26 K70 TAN 1667 O2 LOW BANK2/1
B27 GROUND
B28
B29 K49 TAN 1664 O2 LOW BANK1/1
B30
B32 T32 BLK/WHT 771 TRANS RANGE SWITCH SIG A
B31 B46 PURPLE 420 TCC BRAKE SWITCH CC RELEASE
B33
B34
B35
B36 K05 BLACK 1744 FI #1
B37 K13 YEL/BLK 846 FI #6
B38
B39
B40 GROUND
B41
B42 B36 FAN RELAY #1
B43 K07 RED/BLK 877 FI #7
B44 K08 LT BLU/BLK 844 FI #4
B45
B46
B47
B48 G35 GRY 597 5V REF
B49
B50
B51
B52
B53
B54 K20 ORG/BLK 469 LOW REF MAP
B55
B56
B57 B20 ORG/BLK 440 BATTERY +
B58 B16 DK GRN 1049 CLASS 2 SERIAL DATA(NOT REQ)
B59
B60
B61 K15 PNK/BLK 632 LOW REF CAM SENSOR
B62
B63 K21 BLK/WHT 2755 LOW REF OIL PRESS
B64 GROUND
B65
B66 K51 PURPLE 1666 O2 HIGH SIG BANK 2/1
B67 GROUND PCM GROUND
B68
B69 K48 PUR/WHT 1665 O2 HIGH SIG BANK 1/1
B70
B71
B72 T46 YELLOW 772 TRANS RANGE SWITCH SIG B
B73 K26 BRN/WHT 633 CAM SENSOR SIGNAL
B74 K55 YELLOW 410 ECT SENSOR SIGNAL
B75 B18 PINK 1020 OFF/RUN/CRANK 12V
B76 K10 BLK/WHT 845 FI #5
B77 K04 DK BLU/WHT 878 FI #8
B78
B79 T14 WHT 687 2-3 SHIFT SOLENOID
B80
G01 GROUND PCM GROUND
G02 T01 BRN 418 TCC PWM SOLENOID VALVE
G03
G04
G05
G06 T40 RED/BLK 1228 PC SOL VALVE HIGH CNTRL
G07
G08 T17 LT BLU/WHT 1229 PV SOL VALVE LOW CNTRL
G09 B45 DK GRN/WHT 465 FUEL PUMP SIGNAL
G10 B48 WHITE 121 TACH SIGNAL
G11
G12
G13
G14
G15 K45 BRN 25 ALT GBCM
G16
G17
G18
G19
G20 T16 LT GRN/BLK 822 VSS LOW
G21 T21 PUR/WHT 821 VSS HIGH
G22
G23
G24
G25 G34 TAN 472 IAT SENSOR SIGNAL
G26 K54 PURPLE 2121 IC #1
G27 K53 RED/BLK 2127 IC #7
G28 K57 LT BLU/WHT 2126 IC #6
G29 K58 GK GRN/WHT 2124 IC #4
G30
G31 G11 YELLOW 492 MAF SENSOR
G32 K46 LT GRN 432 MAP
G33 B56 FAN 2 RELAY
G34
G35
G36
G37
G38
G39 K44 RED 631 12V REF CMP
G40 GROUND
G41
G42 T25 TAN/BLK 422 TCC SOL CNTRL
G43
G44
G45
G46 B04 BRN/WHT 419 MIL
G47 T20 YEL/BLK 1223 2-3 SHIFT SOLENOID
G48 T02 LT GRN 1222 1-2 SHIFT SOLENOID
G49
G50 B21 DK GRN/WHT 817 VSS OUT
G51 T35 YEL/BLK 1227 TFT SENSOR
G52
G53
G54
G55
G56
G57 T45 BLACK 552 LOW REF AT
G58 K24 TAN/WHT 332 OIL PRESS SIGNAL
G59
G60 K16 BROWN 2129 IGN CNTRL REF LOW BANK 1
G61 K64 BRN/WHT 2130 IGN CNTRL REF LOW BANK 2
G62 T23 GRAY 773 TRANS RANGE SWITCH SIGNAL C
G63 T24 PINK 1224 TRANS FLUIS PRES SWITCH SIG A
G64
G65
G66 K65 PPL/WHT 2128 IC #8
G67 K66 RED/WHT 2122 IC #2
G68 K59 DK GRN 2125 IC #5
G69 K61 LT BLUE 2123 IC #3
G70
G71
G72 K02 BLK/WHT 3113 02 HEAT LOW BANK 1/1
G73
G74 K01 LT GRN 3212 02 HEAT LOW BANK 2/1
G75 K56 BRN 23 ALT FIELD DUTY CYCLE
G76
G77
G78
G79
G80
B01 TN/WHT 2500 HI SPEED GMALN + (CAN-BUS)
B02 TAN 2501 HI SPEED GMALN - (CAN-BUS)
B14 PNK 839 IGNITION 12V
PED1 B07 BROWN 1271 REF LOW SIG
PED2 B35 WHT/BLK 1164 5V REF
PED3 B41 LT BLUE 1162 APP SENSOR 2 SIG
PED5 B22 DK BLU 1161 APP SENSOR 1 SIG
PED6 B29 TAN 1274 5V REF
PED7 B08 PURPLE 1272 REF LOW SIG
TAC2 K31 DK GRN 485 5V REF
TAC3 K29 PURPLE 486 LOW REF
TAC4 B17 GRAY 397 CRUISE ON
TAC5 B33 GRY/BLK 87 CRUISE RES/ACC
TAC6 B32 LT BLU 20 CHMSL SUPPLY
TAC 7 B19 PINK 539 IGN 12V
TB4 K60 BROWN 582 TAC MOT CNTRL 2
TB2 K63 YELLOW 581 TAC MOT CNTRL 1
TB1 K52 BLACK 1704 LOW REF
TB6 K31 DK GRN 486 TP SENSOR 2
TB7 K29 PURPLE 485 TP SENSOR 1
TB8 K41 LT BLU/BLK 1688 5V REF
K73 BLACK GROUND
