1989 350tpi prom chip
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From: Ontario, Canada.
1989 350tpi prom chip
Does anyone know the GM part number for the stock 350tpi prom chip used in 1989. I have a 1989 IROC that came with a 305tpi automatic in it. I have since replaced the engine with some upgrades and I know that I need a 350 chip for it. The GM dealer has given me two numbers that are possible but thought I would ask the message board to see what answer I can get here. Thanks.
Joined: Feb 2000
Posts: 1,855
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From: St. Augustine, FL
Car: 89 GTA
Engine: 383
Transmission: 4L80E
Axle/Gears: 12 bolt-3.73
The dealer should be able to tell you. I think it's APYP, but don't quote me.
Might want to check the prom tuning tech article and follow the links, I know it's in there.
Might want to check the prom tuning tech article and follow the links, I know it's in there.
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From: Irmo, SC
Car: 1992 Pontiac GTA
Engine: 305TPI
Transmission: 700R4
Axle/Gears: 10-bolt, 2.73
If you have an auto/2.77 gears, the part number is 16150499. If you have an auto/3.27 gears, the part number is 16150502. Info is from AC Delco's site.
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