Broadcast code
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
What car / trans ?
Codes are unique to a certain year / trans combination.
Is printed on the memcal inside the ECM
http://chevythunder.com/prom_bcc_1989.htm
Codes are unique to a certain year / trans combination.
Is printed on the memcal inside the ECM
http://chevythunder.com/prom_bcc_1989.htm
Last edited by rodj; Oct 28, 2008 at 02:25 AM.
Drifting
Joined: Oct 2004
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From: Hawaii
Last edited by James93LT1; Oct 28, 2008 at 12:18 PM.
Team Owner
Joined: Sep 2003
Posts: 25,331
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Try your VIN here and check the results. I do believe it will give the correct "original/as built" information and include any "rolling" updates.
http://tis2web.service.gm.com/tis2web
http://tis2web.service.gm.com/tis2web
Thread Starter
Pro
Joined: Oct 2003
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From: Hesperia California
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Team Owner
Joined: Sep 2003
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Did you try the link I provided for you to enter the VIN? I've used this for calibration information and PROM ID's for years and I used it yesterday for some '90 and '91 information. It worked for them!
BTW no 3.45 in '89 MY either 3.33 or 3.54 but "rodjs" info is good both axle ratios I'm quite sure. I did though see some other information in a parts catalog for an ANYL I believe but both used the same service replacement PROM. I'm interested in what information the link provided.
BTW no 3.45 in '89 MY either 3.33 or 3.54 but "rodjs" info is good both axle ratios I'm quite sure. I did though see some other information in a parts catalog for an ANYL I believe but both used the same service replacement PROM. I'm interested in what information the link provided.
Last edited by WVZR-1; Oct 29, 2008 at 02:00 AM.
Team Owner
Joined: Sep 2003
Posts: 25,331
Likes: 2,722
Here's an '87 MY VIN from eBay: 1G1YY3186H5124850 You can use this to see how it works. You need to use some avalable information but you'll see all the possibel combinations to match specific RPO's etc. We used this information in OBD1 days to arrive at the "more current" available updates for the PROM. It surprises me that it would do one '87 VIN and NOT another. Is yours an EXPORT specific build?
