Need 4-pin GM module - The 1947 - Present Chevrolet & GMC Truck Message Board Network

hanssolo · 10-24-2003, 05:24 AM

Anyone got a good junkyard spare laying around? Must be "GM". I'm tired of the foreign junk. Can send up to $10 up front for postage and effort depending on your knowledge of it. Small padded envelope would do I guess.

VTKidder · 10-24-2003, 10:26 AM

I'm heading junkyarding tomorrow and will check it for you; any particular years that run the 4-pin? I'll grab a couple if I find some. Just let me know what years I should be looking in.

hanssolo · 10-24-2003, 03:19 PM

All 1975-1980 GM. Some 1974 Cads, Buicks and Olds. After 1980 4&5 pins and then 7 pins mingled. All 7 pin have no vacuum advance. So '75-'80 is a pretty sure bet. I don't know if theres a difference between the 6 or 8 cyl. but mines a V8.
Thanx VT and happy hunting.

**68 Stepside** · 10-24-2003, 08:29 PM

I don't know if there's any difference between the 6 & 8 cyl modules either, but I have a GM module out of a V6 HEI in my 406's HEI. It seems to run just fine.

*Phillip Johnson* · 10-24-2003, 08:49 PM

Ive had good luck with the one from Napa.. Autozone has a fairly good one also. Most jusk yards wont tear a good HEI apart when they will sell them for $25 complete if you pull and $50 if they pull.

hanssolo · 10-24-2003, 09:53 PM

68 stepside- thanx. That answers that question. Are there any large pick-yer-own-parts yards in our area? I think they're the only way to go.
As far as generics...I had lengthy discussion with fellow board member who works distributor testers and he convinced me that original GM modules produce the cleanest and most reliable signal. He's seen some nasty signals on the auto parts replacements.

cableguy0 · 10-25-2003, 11:34 AM

go get an msd module or something instead of screwing with a used module thats gonna go bad. could be tomorrow could be 2 years but ya never know

Longhorn Man · 10-25-2003, 11:48 PM

I have a GM one laying around...shooting you a PM.
VTKidder was here first though. (Don't want to step on anyone's muddy junk yard feet)

VTKidder · 10-27-2003, 07:50 AM

Have at it.....I didn't stumble across anything this weekend. Checked a couple rigs, but they'd had the module heisted already. Sorry....

Huck · 10-27-2003, 09:31 AM

While changing the module, change the condenser along with it. It's cheep and can dirve you nuts when it starts to go---most noticeable when wet/damp but seems fine when dry. Only takes a minute to swap out with module.

busterwivell · 10-27-2003, 04:41 PM

I went to the Chevy dealer for one. Told him for a 78. Seems like it was $40/45 new.

10-24-2003, 05:24 AM	#1
hanssolo Registered User Join Date: Sep 2001 Location: central Ill. USA Posts: 447	Need 4-pin GM module Anyone got a good junkyard spare laying around? Must be "GM". I'm tired of the foreign junk. Can send up to $10 up front for postage and effort depending on your knowledge of it. Small padded envelope would do I guess. __________________ 69 C10 longbed: 357c.i. /TH400/3.73s/AC/ beige primer/saving $ for paint ______________________________

10-24-2003, 03:19 PM	#3
hanssolo Registered User Join Date: Sep 2001 Location: central Ill. USA Posts: 447	All 1975-1980 GM. Some 1974 Cads, Buicks and Olds. After 1980 4&5 pins and then 7 pins mingled. All 7 pin have no vacuum advance. So '75-'80 is a pretty sure bet. I don't know if theres a difference between the 6 or 8 cyl. but mines a V8. Thanx VT and happy hunting. __________________ 69 C10 longbed: 357c.i. /TH400/3.73s/AC/ beige primer/saving $ for paint ______________________________ Last edited by hanssolo; 10-24-2003 at 03:24 PM.

10-24-2003, 08:29 PM	#4
68 Stepside huh? Join Date: May 2000 Location: Washington, Illinois Posts: 5,690	I don't know if there's any difference between the 6 & 8 cyl modules either, but I have a GM module out of a V6 HEI in my 406's HEI. It seems to run just fine. __________________ Someday when I'm lonely, Wishing you weren't so far away, Then I will remember Things we said today. RIP El Jay

10-24-2003, 09:53 PM	#6
hanssolo Registered User Join Date: Sep 2001 Location: central Ill. USA Posts: 447	68 stepside- thanx. That answers that question. Are there any large pick-yer-own-parts yards in our area? I think they're the only way to go. As far as generics...I had lengthy discussion with fellow board member who works distributor testers and he convinced me that original GM modules produce the cleanest and most reliable signal. He's seen some nasty signals on the auto parts replacements. __________________ 69 C10 longbed: 357c.i. /TH400/3.73s/AC/ beige primer/saving $ for paint ______________________________

10-25-2003, 11:34 AM	#7
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,948	go get an msd module or something instead of screwing with a used module thats gonna go bad. could be tomorrow could be 2 years but ya never know __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

10-24-2003, 10:26 AM	#2
VTKidder Registered User Join Date: May 2003 Location: Vermont Posts: 996	I'm heading junkyarding tomorrow and will check it for you; any particular years that run the 4-pin? I'll grab a couple if I find some. Just let me know what years I should be looking in.

10-24-2003, 08:49 PM	#5
Phillip Johnson Account Suspended Join Date: Apr 2000 Location: Grants Pass, Oregon Posts: 1,579	Ive had good luck with the one from Napa.. Autozone has a fairly good one also. Most jusk yards wont tear a good HEI apart when they will sell them for $25 complete if you pull and $50 if they pull.

10-25-2003, 11:48 PM	#8
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	I have a GM one laying around...shooting you a PM. VTKidder was here first though. (Don't want to step on anyone's muddy junk yard feet)

10-27-2003, 07:50 AM	#9
VTKidder Registered User Join Date: May 2003 Location: Vermont Posts: 996	Have at it.....I didn't stumble across anything this weekend. Checked a couple rigs, but they'd had the module heisted already. Sorry....

10-27-2003, 09:31 AM	#10
Huck Senior Member Join Date: Jun 2001 Location: Shelbyville, KY Posts: 3,261	While changing the module, change the condenser along with it. It's cheep and can dirve you nuts when it starts to go---most noticeable when wet/damp but seems fine when dry. Only takes a minute to swap out with module.

10-27-2003, 04:41 PM	#11
busterwivell Registered User Join Date: Jan 2002 Location: Sahuarita, AZ USA Posts: 2,033	I went to the Chevy dealer for one. Told him for a 78. Seems like it was $40/45 new. __________________ Bill - Tucson, AZ 47 Chevrolet 2 dr sedan 56 Chevrolet 210 2 dr sedan 66 Chevrolet Malibu 2 dr 4 speed 71 Chevrolet C30 Longhorn 86 Chevrolet Monte Carlo SS (Sold) 01 Chevrolet Tahoe IM - BUSTERWIVE@aol.com



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