Engine won't start or turn over - UPDATED

[Russell]

Thank you! Thank you! Thank you!
Thank you to everyone with the tips to help troubleshoot and repair my starting problem.

It wasn't the starter, it wasn't the neutral safety switch, it wasn't the wiring, IT WAS THE IGNITION SWITCH!

After going through the helpful tips you guys provided, and some additional reading, and some electrical troubleshooting with a meter, I found that
the start position in the five-position ignition switch wasn't working.

I ordered a ACDELCO D1405B Ignition Starter Switch for a 1978 GMC K35 PICKUP 6.6L V8 through Rock Auto. It was a perfect match. I put it in tonight,
and it started right up.

Thanks again for all the help. I am grateful beyond words for this forum and this GMC community!!!
--
Russell Keith,
1978 E2 "Harry" 403 (still carbureted), Danny Dunn Tranny, Thorley, Stock Brakes w/Remote Vacuum Brake Booster, Quad Bags, Dakota Digital Dash, 6.5 kW
Onan, Dunedin, Florida

 

[charles boyd]

Good news.. make sure the switch is adjusted where it will operate with tilt in all positions.

> Thank you! Thank you! Thank you!
> Thank you to everyone with the tips to help troubleshoot and repair my starting problem.
>
> It wasn't the starter, it wasn't the neutral safety switch, it wasn't the wiring, IT WAS THE IGNITION SWITCH!
>
> After going through the helpful tips you guys provided, and some additional reading, and some electrical troubleshooting with a meter, I found
> that the start position in the five-position ignition switch wasn't working.
>
> I ordered a ACDELCO D1405B Ignition Starter Switch for a 1978 GMC K35 PICKUP 6.6L V8 through Rock Auto. It was a perfect match. I put it in
> tonight, and it started right up.
>
> Thanks again for all the help. I am grateful beyond words for this forum and this GMC community!!!

--
C. Boyd
76 Crestmont
East Tennessee

 

[Matt Colie]

> Thank you! Thank you! Thank you!
> Thank you to everyone with the tips to help troubleshoot and repair my starting problem.
> It wasn't the starter, it wasn't the neutral safety switch, it wasn't the wiring, IT WAS THE IGNITION SWITCH!
> After going through the helpful tips you guys provided, and some additional reading, and some electrical troubleshooting with a meter, I found
> that the start position in the five-position ignition switch wasn't working.
> I ordered a ACDELCO D1405B Ignition Starter Switch for a 1978 GMC K35 PICKUP 6.6L V8 through Rock Auto. It was a perfect match. I put it in
> tonight, and it started right up.
> Thanks again for all the help. I am grateful beyond words for this forum and this GMC community!!!

Russell,

This is want the community likes to hear and what we are here to promote.

This is why we always start with the diagnostics...

Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit