The 1947 - Present Chevrolet & GMC Truck Message Board Network

The 1947 - Present Chevrolet & GMC Truck Message Board Network (https://67-72chevytrucks.com/vboard/index.php)
-   The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board (https://67-72chevytrucks.com/vboard/forumdisplay.php?f=4)
-   -   Somebody tell me what this is please, other then a black box (https://67-72chevytrucks.com/vboard/showthread.php?t=478551)

chevybuldr 08-07-2011 10:08 PM

Somebody tell me what this is please, other then a black box
 
2 Attachment(s)
Whats this for? Is it the same for big block and small block? It was under the dash of both an '86 and '88 suburban I parted.

Thanks in advance

cochino12 08-07-2011 10:14 PM

Re: Somebody tell me what this is please, other then a black box
 
Is that the power window module?

Rogue_Alphonse 08-07-2011 10:17 PM

Re: Somebody tell me what this is please, other then a black box
 
Quote:

Originally Posted by chevybuldr (Post 4833510)
Whats this for? Is it the same for big block and small block? It was under the dash of both an '86 and '88 suburban I parted.

Thanks in advance

I think it's the ...ECU? or whatever they called it for the electronically-controlled Quadrajets they had in 1985 and '86. My '86 C-10 had one that looked damn similar, but it was in yellow plastic rather than white and not on a big bracket like that. It was mounted on the passenger side where GM later mounted the TBI ECU's.

chevybuldr 08-07-2011 10:22 PM

Re: Somebody tell me what this is please, other then a black box
 
Quote:

Originally Posted by Rogue_Alphonse (Post 4833531)
I think it's the ...ECU? or whatever they called it for the electronically-controlled Quadrajets they had in 1985 and '86. My '86 C-10 had one that looked damn similar, but it was in yellow plastic rather than white and not on a big bracket like that. It was mounted on the passenger side where GM later mounted the TBI ECU's.

No this is up near the ash tray area I think it was or the break pedel. The ECU is still in the '88 for the TBI.

Rogue_Alphonse 08-07-2011 10:24 PM

Re: Somebody tell me what this is please, other then a black box
 
Quote:

Originally Posted by chevybuldr (Post 4833547)
No this is up near the ash tray area I think it was or the break pedel. The ECU is still in the '88 for the TBI.

I never really dug into that part of the dash enough to find anything like that... got me stumped!:lol:

rwhit57 08-07-2011 10:44 PM

Re: Somebody tell me what this is please, other then a black box
 
Could it be for trailer brakes? I know a lot of Suburbans had tow packages. I have parted out a number of pickups and I never remember seeing one of those.

My other guess would be something to do with the factory radio.

my4by2 08-07-2011 11:47 PM

Re: Somebody tell me what this is please, other then a black box
 
I believe that is the knock retard ECU for the distributor - should have a knock sensor in the block that runs to it. They used this to retard the timing automatically when it sensed any engine knock.

chevybuldr 08-07-2011 11:50 PM

Re: Somebody tell me what this is please, other then a black box
 
Quote:

Originally Posted by my4by2 (Post 4833793)
I believe that is the knock retard ECU for the distributor - should have a knock sensor in the block that runs to it. They used this to retard the timing automatically when it sensed any engine knock.

But on an '88 with TBI wouldnt that be in the ECU?

thirdstreettito 08-07-2011 11:58 PM

Re: Somebody tell me what this is please, other then a black box
 
I think it's a trailer brake controller, a very basic one.

GmtGmt 08-08-2011 12:32 AM

Re: Somebody tell me what this is please, other then a black box
 
thats the computer for the cruise control

chevybuldr 08-08-2011 12:34 AM

Re: Somebody tell me what this is please, other then a black box
 
Quote:

Originally Posted by GmtGmt (Post 4833858)
thats the computer for the cruise control

Now that sounds like it might be.

MalibuSSwagon 08-08-2011 12:56 AM

Re: Somebody tell me what this is please, other then a black box
 
The knock retard ECU for 85-86 CCC systems is mounted in the same location as the F/I ECU for 88-91 trucks, behind the glove box in a white tray. So thats not it.

BLE 'BURBAN 08-08-2011 01:31 AM

Re: Somebody tell me what this is please, other then a black box
 
1 Attachment(s)
Quote:

Originally Posted by GmtGmt (Post 4833858)
thats the computer for the cruise control

That's exactly what that is. it mounts to the right of the steering column support just above the brake pedal. Item # 11 & 12 in the diagram

chevybuldr 08-08-2011 01:42 AM

Re: Somebody tell me what this is please, other then a black box
 
Awsome Thank you guys!!


All times are GMT -4. The time now is 07:15 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2026, vBulletin Solutions Inc.
Copyright 1997-2025 67-72chevytrucks.com