97 Bonneville SSE 40th anniversary ed - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 05-06-2009, 01:52 AM   #1
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Default 97 Bonneville SSE 40th anniversary ed

Hi everyone just picked up a really clean 97 sse 40th ann edition dirt cheap with a bad tranny. Was wondering if a ser 2 supercharged engine will drop in without any mods since i have to pull out the motor anyway with the trans. Thanks will post pics tomorrow.
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Old 05-06-2009, 08:48 AM   #2
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As long as it'* the same year you just drop it in. If it'* a different year you may need the wire harness and PCM
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Old 05-06-2009, 09:18 AM   #3
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A different harness and pcm are not needed. You can add to your harness and reprogram the pcm. I've found this out to be an easier method from having done a few swaps.

The 96-99 Bonnevilles all had the same motor and bracketry to the average observer and would all drop in w/o much work at all.

Any Series 2 motor will go in easily if you swap the alternator and it'* bracket, AC bracket and the rear exhaust manifold with your existing ones. The coil packs and bracket/tensioner would need to be from an SSEi 96-03.

Wiring wise you would need a wiring kit available from Intense-Racing or ZZP for about $25-$30.

Your pcm would need to be reprogrammed for the supercharged tables etc with the correct transmission gear ratio.

Your transmission would be a weak point, but an output shaft, differential, diff cover and different passenger axle would turn yours into an HD version.

Tada..you would have a full supercharged car as it would have come from the factory if it had been made that way.
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Old 05-06-2009, 09:24 AM   #4
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That'* all well and good if he has access to or has a tuner. If not, changing the PCM that comes with the motor is easier.
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Old 05-06-2009, 10:03 AM   #5
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Originally Posted by Danthurs View Post
That'* all well and good if he has access to or has a tuner. If not, changing the PCM that comes with the motor is easier.
No, it'* not. The SC vehicle has a fuel pump module that the NA doesn't among some other items. This would kick on a few different DTC lights if not programmed properly. Dropping in a different pcm will also have a different VIN#, w/o knowing what state he'* in and it'* emissions laws, it would be hasty to not warn about the potential for emissions/state law issues by showing up with the wrong vin in the pcm.
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Old 05-06-2009, 10:20 AM   #6
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This is starting to look like a tennis match, my necks getting tired going back and forth. I see alot of good info floating here, and when the kinks iron out, somebody want to make a "How To" thread. please?
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Old 05-06-2009, 10:28 AM   #7
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You bring up a good point Bill. I had not thought about the vin. In both cases he will need a tuner. Unless he gets a programed PCM with a performance tune. The vin can be set at that time. In both cases the PCM would need to be dealt with.
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Old 05-06-2009, 10:33 AM   #8
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I just realized what a rookie i am. ALL of that was completely over my head.LOLOL
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Old 05-06-2009, 10:42 AM   #9
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We all have to start at the rookie point. In time it gets better. I think one point that was made here is, if your going to do much more then simple mods a tuner is the best money you can spend.
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Old 05-06-2009, 10:52 AM   #10
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I got the basics, I just get lost when you guys start usin all the acronyms, DTC, PCM and what not.LOL
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