Bought this already installed on an '88 cradle. It's out of a '99 Bonneville and included the motor/trans, PCM, stripped harness, '88 cradle with hubs and suspension installed, fuel tank with upgraded pump and modified lines.

So far I've taken the top end down to the LIM to replace all the gaskets I could find: LIM metal gasket set, exhaust manifold gaskets, fuel inj. o-rings top and bottom, supercharger gasket, cleaned TB and new gasket and all sensor o-rings. Also cleaned it up and tried to organize the wiring in preparation for building the harness.

I've been reading for a few days to get a good starting point to build the harness. One question that I can't find after searching is how to mount the '88 cradle into my '87 since I can't find anyone making/selling the adaptor plates that I found were being used in prior posts. Anyone have any direction for that?

Here's the swap when I first got it home


Here it is now


Here's the rear of the car (kinda crowded in the garage right now)

quote Originally posted by eodtech72: One question that I can't find after searching is how to mount the '88 cradle into my '87 since I can't find anyone making/selling the adaptor plates that I found were being used in prior posts. Anyone have any direction for that?

http://www.arrautmotorsports.com/parts/suspensions

About halfway down the page.


Good luck on swap.

Thanks for the link, already sent an email to order.

During the wiring today I ran into a few conflicting wires:

1. My EGR has 5 wires one of which is purple and it isn't listed in the wiring I downloaded. Anyone know this wiring well?

2. My alternator has 2 wires, 1 red which I see where it goes but I don't see the other one which is grey?

Appreciate any help.

Maybe you can match up your questionable EGR wire by process of elimination:
C1 32 RED EGR A
C2 4 GRY EGR E
C2 28 BRN EGR C
C1 31 BLK EGR B
C2 30 GRY EGR D


The grey alternator wire might go to PCM C2, pin 29, wire #23, "Gen Term F Monitor"? Gray - Used by some PCMs, not used with the standard Series 2 PCM swap.

[This message has been edited by Ken_86gt (edited 09-29-2014).]

I have never seen an EGR valve connector with a purple wire.

EGR A - C1 32
EGR B - C1 31
EGR C - C2 28
EGR D - C2 33 <--
EGR E - C2 4

The actual colors of plastic insulation of the wires is ignored by the electrons... And apparently GM also when it comes to the EGR valve.

WHY use Coil Overs and Not cut off the lower Spring perch ?

I bought just like it sits but if I can cut those off I will. Currently have the wire harness built except for the egr and tranny wiring. Still trying to find some info on how to finish it up. I'll be posting some updated pics later tonight.

Just updating some pics of the wire harness build. Still have some questions that I'm searching for to finish up....

This may help you

Round looking connector
C1 4 Lt Green Shift Solenoid A Control (1-2 Shift) A
C1 22 Pink Transmission Fluid Pressure Sw A N
C1 44 Yellow//Black Shift Solenoid B (2-3 Shift Solenoid) B
C1 62 Dk Blue/White AT Input Shaft Speed Sensor Low V
C1 63 Red/Black AT Input Shaft Speed Sensor High S
C2 17 Red Transmission Fluid Pressure Switch P
C2 45 Red/Black AT Pressure Control Solenoid High C
C2 46 Lt. Blue/White AT Pressure Control Solenoid Low D
C2 57 Dk. Blue Transmission Fluid Pressure B R
C2 63 Yellow AT TCC Release Switch Input U
C2 68 Yellow/Black Trans Fluid Temp Sensor Signal L
C2 78 Brown AT TCC PWM Solenoid Control T

7 pin grey connector is the Transmission Range Selector Switch
A ORN/BLK 434 Park/Neutral input
B ORN 840 Fused Battery Feed
C Lt GRN 275 Park Output to Rear Compartment Release
D BLK 1050 Ground
E PPL 6 Crank Relay Output-Coil
F Lt GRN 24 Backup Feed Lamp
G YEL 5 Ignition Voltage

4 Pin Transmission Range Switch
A WHT 776 Transmission Range Switch Signal P (Parity) C2 16
B YEL 772 Trans Range Switch Signal B C1 68
C YEL 773 Trans Range Switch Signal C C2 56
A YEL 771 Trans Range Switch Signal A C2 16

[This message has been edited by Ken_86gt (edited 09-30-2014).]