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PostPosted: Mon Jul 24, 2023 11:56 pm 
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Joined: Mon Jul 24, 2023 11:13 pm
Posts: 1
Year and Trim: 2000 Bonneville SSEI
Okay I'm new. I've found a thread about 3800 series 2 being swap into a 2000-2005 Deville.. I think this was the catalyst of my very 1st swap that's on very low budget. So I rather take a non invasive approach on swapping this vehicle. I also chosen not to swap subframes due to cost concerns. So here's my list;

2000 Pontiac Bonneville SSEi - $150 (Donor Car)
**Good 3.8 S/C, and Good 4t65e
2005 Cadillac DTS Premium <$600
(Project Replacement Car)
**4.6 needs timing worked on, but I'm not taking any chances on that motor so I'll probably sell the northstar as collateral.

And here's what I compiled from the very first forum as this is for to swap a Supercharged Series 2 V6 from a 2000 Bonneville SSEI into a 2005 Cadillac DTS Premium, if there's anything I'm missing please let me know.

*1) SSEI Engine and Engine Wiring with minimal modifications to the DTS hood fuse box connector. All of the Caddy interior electronics will work properly for the 3800 s/c v6.

*2) SSEI Exhaust downpipe can be bolted directly to the DTS exhaust. It will retain the factory 3800 starter location. Also, the A/C lines route the same, so the DTS Condenser wouldn't need replacement. The DTS accumulator is also in the same place. 2000-2003 Bonneville SSEI models came equipped with Stabilitrak 2.0. So the ABS wiring is also the same as the DTS.

*3) The DTS 4t80e transmission can be used with the 3800 s/c, just re-drill the flex plate for the four bolt converter and re-drill one bell housing bolt.

*4) 90% of the 2000-2005 Deville DTS wiring was much closely matched to the 2000-2003 Bonneville SSEI. All the major SSEI wiring plugs do match up to the DTS, so reprogram the BONNEVILLE PCM to match your specific DTS VIN. But REUSE THE BONNEVILLE ENGINE HARNESS. Bypass the communication line at the electronic suspension module, so there's no "service suspension". You'll also have to do the "RELEARN" for the Bonneville PCM once everything gets converted over to the DTS. Key on till the security light goes out on the dash (approx 10 minutes) cycle key off, back on twice more (30 min total time) to get the DTS can recognize it.

Last edited by DeUndefined1 on Wed Jul 26, 2023 3:01 pm, edited 1 time in total.

PostPosted: Tue Jul 25, 2023 10:03 pm 
Certified Bonneville Nut
Certified Bonneville Nut
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Joined: Wed May 21, 2008 11:47 pm
Posts: 6831
Location: Philadelphia
Year and Trim: 95 SLE
From what I've read, James (turbocharged400sbc) and Ryan and were able to get a L67 pcm to control the 80e.

95 SLE... a keeper. 241k miles. Low and Slow.
97 BMW 528i
98 Infiniti vq35'd i30: 13.3@104mph, 30MPG Hwy (RIP)
02 Jag X-type
03 BMW M5
05 Chevy Cobalt LS
07 Infiniti G35s 6MT (Sold)
07 Ducati Monster S2R 800 with DS1000 swap
83 Yamaha IT175K
72 Yamaha DS7: '74 RD250 swap, JL chambers

Info on dropping a 92-99: Here.

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