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 Post subject: service manuals...
PostPosted: Wed Oct 10, 2018 2:28 pm 
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Joined: Tue Aug 25, 2009 8:32 pm
Posts: 4759
Location: SE Michigan
Year and Trim: '99 Montana
'04 Dirtymax
'97 Camaro
'92 Trofeo
I've been double and triple checking the manuals on my '97 L67 swap ('98 engine harness), specifically for any differences in the Engine Controls section to identify what goes through the C101 pass-through.

Currently the fuel gauge doesn't work. I was able to find the wiring diagram for the '98 harness, shows the PCM connections for the fuel sender input and output. I found the PCM fuel sender input for the '97, but it doesn't mention an output for the '97. Thus far, the majority of the wires have been the same, with minor differences.

The differences I've found so far are:
-Need to confirm that a splice labelled S.929 loops C101 pins C1 and B4 on the body harness side. If not then need to add C1 to '98 harness and splice into B4 so the fuel tank pressure sensor works.
-No wiring diagrams for the 4t60 in this section - have to reference individual diagrams in the transmission section to know that there is a difference between the 4t60 and 4t65 wiring (now I don't feel as bad lol).
-Move body harness L3 pin to C3 (oil life reset switch for Buicks). The body harness with the L3 pin shouldn't have a wire in C3, but the '98 harness has a wire on L3, though nothing bad should happen if you press the button.
-C6 pin on the '97 harness is a IP fuse #5 +12v R/S for the EGR - it is not used on the '98 harness, giving you a free switched power source!
-Pin D7 on the '98 harness is the output from the PCM to the fuel gauge. I can't find the corresponding pin on the '97 harness (is it the same or different?)

I've checked the PCM connector end views in my '97 manuals - information there conflicts with information in the individual schematics - the '97 makes no mention of either fuel level input or output, and the '98 only mentions the input. And of course, while I can't really trust them at this point, I can't even find a connector end view with list by cavity for the C101 connector in either manual.

So, does anybody else have access to a (possibly better revision) '97 H-body manual that can check page 6E-21 for the fuel level output or know where I can find the '97 C101 end view and/or cavity list?

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The Fleet:
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'92 Trofeo - Fair weather DD
'99 Montana - top swap 3800
'04 Sierra 2500HD - LLY Duramax

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 Post subject: Re: service manuals...
PostPosted: Thu Oct 11, 2018 11:04 am 
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Posts: 25871
Location: Browerville, MN
Year and Trim: 2004 GXP - plus a handful of other Bonnevilles
I'm using the Techline ESI and I see nothing of the C101 connector end view. I've attached the Engine Controls Connector End Views.


Attachments:
1997 Engine Controls Connector End Views.docx [44.97 KiB]
Downloaded 242 times

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 Post subject: Re: service manuals...
PostPosted: Thu Oct 11, 2018 12:46 pm 
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Certified Bonneville Nut
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Joined: Tue Aug 25, 2009 8:32 pm
Posts: 4759
Location: SE Michigan
Year and Trim: '99 Montana
'04 Dirtymax
'97 Camaro
'92 Trofeo
That does help, it at least shows what pin on the original PCM was controlling the gauge. I'll have to see if I saved the original harness, and hopefully trace it back from there.

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Boost addict
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The Fleet:
'93 SSEi - Twincharged + manual Build thread
'97 Camaro - Top swap
'05 STS - V8, AWD, her DD
'92 Trofeo - Fair weather DD
'99 Montana - top swap 3800
'04 Sierra 2500HD - LLY Duramax

Current project:
Something cool, trust me.

Upcoming projects:
'92 Bonneville SSE
'87 LeSabre T-type
'67 LeSabre

Gone to greener pastures:
'84 Sierra Classic - Twin turbo 3800
'97 LeSabre - Top swap

RIP:
'86 LeSabre - pictures
'93 SE - L67


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 Profile  
 
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