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There are no fuses, relays, or switches between the ign. sw. and the starter on a 94 burb. Check the CRANK fuse for voltage when cranking. It does not feed the starter, but does signal the LP relay. Could be the firewall connector or even a fried sol. wire near the starter.

Ever notice how similar the 6.5 timing cover is to a Pontiac 389 timing cover? My old Pontiacs were a pita also.

Just curious, is this the FFM your van uses?

Found that photo on the web, thanks anyway.

It bolts to the P/S pump to support the pressure hose with EVO equipped trucks.

The security lamp is turned on by the PCM grounding the security lamp. The PCM must get the correct code from the EVO/PASSLOCK module or the PCM will ground the lamp and kill the injectors.

Have you tried running it with the CPS disconnected and then again with the OPS disconnected to see if there is any difference in how it runs? I doubt the injectors are the problem or the IP since both IP's do the same thing. Probably electrical or even timing gear off. You could try removing...

Injector line timing/layout is the same for all 6.2 & 6.5 diesels.

A 97 truck should not have passlock, it started in 98. With passlock the resistor mod simply bypasses the ignition switch sensor. Passlock will still be there, and can only be turned off by programming the PCM. A 97 PCM does not have passlock enabled.

Does your R/V have a turbo?

I don't think that will work. The VSSB does not output a modified VSS signal (40 PPR), that goes straight thru. It only outputs modified PPM signals. The gasser PCM would need a modified VSS signal. There are magic boxes that will do that.

Like this? https://www.ebay.com/itm/235501225618 or search workhorse

A 96-up gas truck will not have a VSSB. Only diesels have the VSSB after 1995.

I was going to say about 6. Looking good.

Mine were the original lines.

That is the GM 16147609 TCM, the part num has been removed. The OP should have the same TCM but maybe a different BCC (BDWT). Should work just fine.

ATP was making that cable long before I contacted them. They either think it is the same as the 6.5 cable or they just don't want to invest in another part number. Y-368 is for the 6.2 and uses a different bracket on the IP. This has been a problem for a long time. And on the IP differences -...

I drew that for ATP trying to get them made, they did not respond.

Go for it -