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#1 |
Registered User
Join Date: Oct 2008
Location: Livermore ca
Posts: 699
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Somebody tell me what this is please, other then a black box
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 |
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#2 |
It followed me home?
Join Date: Mar 2003
Location: Yup
Posts: 5,751
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Re: Somebody tell me what this is please, other then a black box
Is that the power window module?
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Adam That's why they call it a shortcut Kyle, if it was easy it would just be the way. 86 c-10 SWB 85 CCSB 90 GMC K30 Crew SRW 1985 C30 Dually |
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#3 |
Registered User
Join Date: Dec 2009
Location: Gap PA
Posts: 280
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Re: Somebody tell me what this is please, other then a black box
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.
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1991 Mustang GT Vert, T-5 w/ Pro 5.0, Trick Flow upper & lower, BBK cold air intake, 3:73, BAMA chip, etc. 1988 K5 Blazer, [coming soon] TBI 400, SM465/NP208, 12 bolt rear, 3:08's, looks like a 1980. 1998 Jeep Grand Cherokee 4.0 fully loaded daily driver! Where there's a will, there's a rig! |
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#4 | |
Registered User
Join Date: Oct 2008
Location: Livermore ca
Posts: 699
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Re: Somebody tell me what this is please, other then a black box
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#5 | |
Registered User
Join Date: Dec 2009
Location: Gap PA
Posts: 280
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Re: Somebody tell me what this is please, other then a black box
Quote:
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1991 Mustang GT Vert, T-5 w/ Pro 5.0, Trick Flow upper & lower, BBK cold air intake, 3:73, BAMA chip, etc. 1988 K5 Blazer, [coming soon] TBI 400, SM465/NP208, 12 bolt rear, 3:08's, looks like a 1980. 1998 Jeep Grand Cherokee 4.0 fully loaded daily driver! Where there's a will, there's a rig! |
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#6 |
Registered User
Join Date: Jan 2011
Location: Tulsa,Okla
Posts: 590
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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. |
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#7 |
Registered User
![]() Join Date: Dec 2010
Location: Hot Springs, AR.
Posts: 1,215
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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.
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1977 Chevrolet K30 LWB Crew Cab 497HP Mast Motorsports 6.0L LY6 HO engine GM NV4500 5-speed, Centerforce clutch + NP205 D60 + 14-bolt FF w/ Eaton posi + disc brakes Skyjacker 2.5" full spring lift w/ Nitro shocks Custom paint + interior http://67-72chevytrucks.com/vboard/s...d.php?t=435722 |
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#8 |
Registered User
Join Date: Oct 2008
Location: Livermore ca
Posts: 699
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Re: Somebody tell me what this is please, other then a black box
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#9 |
Resident of Here
Join Date: May 2008
Location: Wesley Chapel, FL, USA
Posts: 7,716
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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.
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~Bradley~ 2004 Black GTO LS2/T56 too much to list ![]() Miss having a truck ![]() |
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#10 | |
Conversion Truck Addicted
Join Date: Sep 2009
Location: Denmark, Europe
Posts: 1,551
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Re: Somebody tell me what this is please, other then a black box
thats the computer for the cruise control
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Thomas Quote:
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#11 |
Registered User
Join Date: Oct 2008
Location: Livermore ca
Posts: 699
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Re: Somebody tell me what this is please, other then a black box
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#12 |
Registered User
Join Date: Sep 2009
Location: Weare,NH
Posts: 1,592
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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.
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#13 |
In the Forgotten far North.
![]() Join Date: Jul 2007
Location: Anchorage, Alaska
Posts: 2,627
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Re: Somebody tell me what this is please, other then a black box
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
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1987 R3500 CREW CAB DUALLY (BIG RED)Acquired 06/12/2015 1990 chevy suburban V2500 5.7L My cluster Mods-Nov 2007 overhead console Stereo install Round 2 Aug 2009 Heated/turn signal mirror upgrade |
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#14 |
Registered User
Join Date: Oct 2008
Location: Livermore ca
Posts: 699
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Re: Somebody tell me what this is please, other then a black box
Awsome Thank you guys!!
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