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GM ECU eproms

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[edit] GM House Number to Industry Part number

[edit] Cross Reference

In GM (in what can only be described as an attempt to keep life interesting) decided to use house numbers on their EPROMS. The tables here will help you figure out which chip type it is.
When working with 2732 chips - do not assume you know which type it is and program them with the lowest Vpp until they work. Assume that many 2732 will have been programmed at the wrong voltage causing damage - so have spares on hand.

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Chevy and GMC Trucks:
ECM P/N PLATFORM EPROM TYPE
1227137 86 Astro/Safari Van, LB4, 4.3L 2732A
1228934 85 - 93 C/K Truck, Commercial Truck, (HD) Manual Trans LB4, 4.3L 2732A
1227747 87 - 91 C/K Truck, Van, 4.3L, 5.7L, 5.0L & 7.4L 2732A
1228747 87 - 92 C/K Truck, Van, 5.7L & 7.4L (HD) 2732A
1228062 89 - 90 4.3L LB4, 2.8L LL2 S-10 2732A
16144288 91 - 92 4.3L S-10 & C/K Truck 2732A
1227749 91 - 93 Syclone & Typhoon 27C128
16147060 or 16127470 91 - 93 C/K Truck, Van, 5.7L & 7.4L (HD) 27C256
1227165 87 - 89 S10 Truck, 2.5L, LN8 27C128
1227165 90 - 91 S10 Truck, 2.5L, LN8 27C128
1227165 or
16156647
91 - 93 S10 Truck, 2.5L, L38 27C128
16146299 92 C/K Truck, Van, 4.3L, 5.7L & 7.4L 2732A
16128420 92 - 93 C/K Diesel Truck L65, Auto Trans, TCM 27C128
16156647 92 S10 Truck, Astrovan 4.3L, L35 CPI 27C256
16156480, 93 - 95 C/K Truck, Van, 5.0L & 5.7L, 2732A
16196396 or
16171199
Manual Trans.
16168625 93 C/K Truck, Van, 4.3L, 5.0L & 5.7L 27C512
16196395 or
16197427
94 - 95 C/K Truck, Van, 4.3L, 5.7L & 7.4L 27C512
16196395 or
16197427
94 - 95 Truck, Van, 4.3L L35 CPI 27C512
16196395 or
16197427
94 C/K Truck, Van, 5.7L & 7.4L (HD) 27C512
16197427 or
16156930
95 C/K Truck, Van, 5.7L & 7.4L (HD) 27C512
16245358 95 C/K Truck, Van, 4.3L 27C512
16245358 95 Truck, Van, 4.3L L35 CPI 27C512
16197427 96 - 97 C/K Truck, L05 EXPORT ONLY 27C512


Chevy Cars:
ECM P/N PLATFORM EPROM
TYPE
1226870 85 Y CAR 5.7L TPI (L98) 2732A
1227165 86 Y & F CAR 5.0L / 5.7L TPI 27C128
1227165 87 - 88 Y & F CAR 5.0L / 5.7L TPI 27C128
1227302 86 - 89 F CAR LB6/LB8 V6 2732A
1227746 87 Caprice/MonteCarlo 4.3L LB4 2732A
1228063 88 F CAR 5.0L LO3 TBI 2732A
1228746 89 - 92 F & B Cars, LO3 & LO5 Eng. 2732A
1227165 89 Y & F CAR 5.0L & 5.7L 27C128
1227730 90 - 92 F CAR LH0 V6 27C256
1227727 or 90 - 91 Y CAR 5.7L TPI 27C256
1227730 90 - 92 F CAR 5.0L & 5.7L TPI
1228331 90 Corvette ZR1 (LT5) 27C256
1228331 91 Corvette ZR1 (LT5) 27C256
16136965 91- 93 Caprice, LB4, L03 & L05 Eng. 2732A
16163860 or
16163993
92 Corvette ZR1 (LT5) 27C256
16159278 92 - 93 Y CAR 5.7L, LT1 27C256
16159278 93 F CAR 5.7L, LT1 27C256
16163993 or
16196394
93 - 95 Corvette ZR1 (LT5) 27C256
16181333 or 16188051 94 - 95 Y, F & B CAR, Cadillac 5.7L, LT1, L99 (FLASH) (incl. 'Rev B') FLASH


Buick/Pontiac Cars:
ECM P/N PLATFORM EPROM
TYPE



1226459 84 - 85 LM9 3.8L V6 Turbo Buick/Pontiac 2732A
1226869 85 Pontiac Fiero 2.8L V6 2732A
1227170 86 - 88 Pontiac Fiero 2.8L V6 2732A
1227148 86 - 87 Turbo Buick 2732A

89 Trans Am LC2
1227748 87 - 88 Pontiac Fiero 2.5L 4 Cyl. LR8 27C128

87 - 90 Celebrity, 6000, Cutlass, Ciera, Century 2.5L 4 Cyl. LR8
1227748 89 Grand Am, Cutlass, Skylark 27C128

2.5L, L68, 4 Cylinder
1227748 90 - 91 Grand Am, Cutlass, Skylark 27C128

2.5L, L68, 4 Cylinder
1227749 87 - 90 Sunbird, Grand Am, 2.0L, LT3 Turbo 27C128
1228253 88 Buick / Pontiac LN3, 3800, V6 27C256
1228253 89 - 91 Buick / Pontiac LN3, 3800, V6 27C256
16141470 91 Buick / Pontiac L27, 3800, V6 27C256
16141470 92 - 93 Buick / Pontiac L67, 3800, Supercharged 27C256
16132792 or
16141470
90 - 92 Pontiac W-Body L27, 3800, V6 27C256
16183247 or
16197428
94 - 95 Buick / Pontiac L67, 3800, Supercharged 27C512
16196387 94 - 95 Buick / Olds L82, 3.1L, V6 Manual Trans 27C256
1227730 87 - 89 Buick / Pontiac LB6, 2.8L, V6
89 - 90 Buick / Pontiac LH0, 3.1L, V6
27C256
1227727 89 - 90 Buick / Pontiac LG5 3.1L V6 MFI Turbo 27C256
1227730 91 - 93 J, L, W Cars LH0 3.1L V6 27C256
16149396 91 - 94 Buick / Pontiac LQ1 3.4L V6
93 - 94 Buick / Pontiac LH0 3.1L V6
27C256


Australian Holden:
ECM P/N PLATFORM EPROM
TYPE
1227808 88 Australian Holden 27C128
16176424 or 16195699 93 - 94 Holden VR 3.8L, 5.0L Auto 27C512
16176424 or 16195699 93 Holden VR 3.8L, 5.0L Manual 27C256
16176424 or 16195699 96 Holden VS 5.0L 27C512


Edelbrock Pro-Flow Systems:
ECM P/N PLATFORM EPROM
TYPE
Edelbrock Edelbrock Pro-Flow Systems 27C256


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