1989 T5 proms
#2
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Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: 1989 T5 proms
Where did you get those codes from?
This list
http://www.chevythunder.com/prom_bcc_1989.htm
has
ANYX is listed as a 305 auto
no ANYY but a APYY also a auto prom
Every-time GM made an changes for whatever reason they issued a new prom ID so the differences may be minor
This list
http://www.chevythunder.com/prom_bcc_1989.htm
has
ANYX is listed as a 305 auto
no ANYY but a APYY also a auto prom
Every-time GM made an changes for whatever reason they issued a new prom ID so the differences may be minor
#3
Re: 1989 T5 proms
Where did you get those codes from?
This list
http://www.chevythunder.com/prom_bcc_1989.htm
has
ANYX is listed as a 305 auto
no ANYY but a APYY also a auto prom
This list
http://www.chevythunder.com/prom_bcc_1989.htm
has
ANYX is listed as a 305 auto
no ANYY but a APYY also a auto prom
My oem prom is ANYX, and I have the 3:45 gears. And the scan ID on that chart is not accurate either.
But it's still good to see all the different variations.
#6
Supreme Member
iTrader: (31)
Re: 1989 T5 proms
Usually the biggest differences between the different broadcast codes will be what rearend gear ratio, and whether the chip is setup for 49-state Federal emissions standards, or California specific emissions. Those PROM's should be listed here on the site in the FAQ section in the article about factory PROM codes. If you're not in CA, I'd recommend using one with the 49-state, Federal emissions, and whichever gear ratio is the closest match to your car. You'll probably want to check both the Pontiac broadcast codes and the Chevrolet broadcast codes since I'm not sure which ones you posted apply to.
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