Crank no start

[snarl]

So Friday I had a fishbite and stall episode. Pulled over truck started fine and ran great rest of the day. Saturday truck starts fine, run some errands and proceed to replace water pump and radiator. I had disconnected the positive cables. Got that all done and now the truck won't start.

New PMD and cable
Gutted fss
Have fuel to ffm,out of air bleed,out of drain and to injection pump
Fuel in clear retun line, moves a little when cranking
Tried cranking with optical sensor unplugged and cps unplugged, no difference
Have SES light when cranking. (power to ecm)
No fuel out injector lines.
Tried both pmd without extension harness

[Yukon6.2]

Have you ever changed you ignition switch?

[snarl]

No I haven't.

[Yukon6.2]

My 98 has a bunch of electrical issues that went away after changing the switch.
Same on my 2004 Topkick.

[a5150nut]

Ignition switch is little box on lower steering column not the key cylinder.

[Yukon6.2]

Not on my 98 or 04 they were mounted on the column behind the key tumbler.

[Robyn]

Every GM I have owned had the switch on the top of the column about 6 inches or so down toward the firewall from the key unit.

There is a rod that connects the sliding switch to the key/lock unit.

Later ones that use the "chip key" may be different.

[Yukon6.2]

No chip keys on my trucks

[Robyn]

Our 2007 Avalanche has the chip key
Spendy to get extras made.

We only got one key with the rig....so had to get an extra.
The 07 does not have a locking column either....I was surprised at that.

[phantom309]

When the batteries have been disconnected,. The first start the glow plugs cycle off very quickly.
Takes at least two tries,...

[snarl]

PCM was bad.

[DieselDavy]

Thanks for reporting back! It's always nice to know how things turned out.
How old/miles was the PCM?
Dave

[snarl]

Original as far as I know. 285000 miles

[phantom309]

Original as far as I know. 285000 miles

I'm a little confused your original post states otherwise,.??

[DmaxMaverick]

I'm a little confused your original post states otherwise,.??

PMD. PCM. Meh. Same thing.

[phantom309]

New PMD and cable






PMD. PCM. Meh. Same thing.

You think i'm new here,? :)

[snarl]

??????

[DmaxMaverick]

??????
(Ditto)


snarl (original post):

New PMD and cable
PCM was bad.DieselDavy:

How old/miles was the PCM?snarl:

Original as far as I know. 285000 milesphantom309:

I'm a little confused your original post states otherwise,.?? Me:

PMD. PCM. Meh. Same thing.

[snarl]

PMD- Pump mounted driver
PCM - Powertrain control module (the computer)

[Kennedy]

So Friday I had a fishbite and stall episode. Pulled over truck started fine and ran great rest of the day. Saturday truck starts fine, run some errands and proceed to replace water pump and radiator. I had disconnected the positive cables. Got that all done and now the truck won't start.



Is this a southern thing or something?

[trbankii]

I run into people that do that around here too.

[JohnC]

Did they learn on British cars?

Good way to weld your wrench to the chassis.