l36 to l67 pcm interchange questions

**98PONTIAC** · 12-17-2012

Ok hello all new to the forums i have a question i would like to ask maybe i can get some info on my swap. ok sooo heres what i have....

i bought a 99 buick regal park avenue pretty much for my swap, im swapping the l67 into my 98 grand prix gt (spun bearing) my motor will be in tomorrow an hooked up i guess my question is, is the buick pcm a direct plug an play for my 98 grand prix or am i gonna have to do some repining?

an as farm as the swap im swapping pcm,motor,trans

I'm not swapping the wiring due to im gonna run the bbv on vacum only no wiring

Thanx for any an all help

**BillBoost37** · 12-17-2012

PCM may not work, as there was never a Regal Park Avenue. A PA is very unlikely to work well in the GP, Regal might.

**98PONTIAC** · 12-17-2012

good eye lol i meant ultra...anyways do you think i should just by a pcm from a gtp or is there a possibility i could repin the pcm connector. at this point is there a plug an play pcm i could purchase from another l67 equipped vehicle??

**BillBoost37** · 12-17-2012

If you've dropped in the L67 on your L36 harness, you could use a GTP file. However the problems there will be the map sensor (unless you realized it's a cut and solder same colors) to connect it and the Boost control circuit will likely toss a light. But heck, it's a light, not the end of the world.

**98PONTIAC** · 12-17-2012

yea i know about the map sensor an the light doesnt bother me for now thats minor. my main concern is getting the car started i have access to alldata also for wiring diagrams. what if i buy a tuned pcm from zzp for a gtp application.

Now if i plug the ultra pcm into my gt with the l67 can i expect it to start or nothing at all?

**BillBoost37** · 12-17-2012

I'm not sure on the pinouts between the two. Likely it'll start....or fry. I'd say you have about a 60/40 chance w/o looking at the wiring.

**BillBoost37** · 12-17-2012

Might be like the intrigue in my garage currently. Put a 2K Regal bin on a pcm and it says... nada! on a 98 Regal it supposedly started

**98PONTIAC** · 12-17-2012

Lol, I was just going to go buy a gtp pcm im assuming the wiring would be the same but with the way my lucks going i would spend 100 on the pcm an fry it lol i guess at this point my priority is to put my hands on the diagram an see what she says.

**98PONTIAC** · 12-17-2012

Will update with pics an progress, motor going in tom.

**98PONTIAC** · 12-17-2012

Is there any pcm that will be a direact plug an play for my 98 gp gt with a l67 engine I'm using the l36 harness I have a 99 buick ultra pcm which is the car my swap came from

**DOHCZ34** · 12-18-2012

A 1998 gtp pcm would be plug and play. The ultra pcm won't work.

**98PONTIAC** · 12-18-2012

Thanx will pick one up this weekend. Got new oil pan gasket valve cover gaskets put on including changing oil filter housing an gasket putting motor in Sunday should be running. Does it have to be 98 only or can it be 98-02?