Potential For Delay Really Getting Strong
There's got to be one or two similarities between an LT-1 in a mid-nineties B-body and a 6 cyl. in a last gen W-body...... or not. But I repeat you're absolute best approach will be to hunt on a forum that caters to your particular car, as the name 'Impala' might end up being the only thing the two cars share in common. You might get lucky with some codes that crossover.... or not. But curious what did a few searches on your own bring up for that code on a 3.4L.?
\'96SS SOB: SSRI, Herter Tune, Tri-Y II, , 3000 Edge, F/HO bars, METCO extendeds with CV MMC, Bilsteins, currently Vredestein Ultrac Sessanta (315/35 rear)
\'96FWB BUW-Butt Ugly White: PCMPerformance tune, HDFA w/ swissed filter, 1/2 SLP s.s. catback with H- and Flow Super 50s, oem opti rebuilt 3 times, SS Bars, METCO LCA, Airlift 1000, Monroe SS, PowerTrax No-Slip, CTS wheels with +1 rubber. Finally, wait for it... LT-4 knock module!