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Where to find Obsolete GM PROM
I diagnosed a 1989 Buick Riviera with a hard start condition. If the ignition key is cycled for 10 seconds the vehicle will always start back up. The fix is a PROM update #16141292. This PROM is no longer available through GM. Where can I find a source that wo... Login to read more. 
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| Engine | 3.8 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
1989 Buick Riviera Luxury 3.8L
| Engine | 3.8 L |
| Trans | 4-speed Automatic (Electronic) |
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